How can we help you?

Having your system information ready can help our Technical Support team troubleshoot your issue more quickly. Before calling, have:

• Your Sol-Ark inverter ID and serial number
• Inverter model
• Installer/company name, if applicable
  • Installer Corps 6-digit partner ID
  • Single line diagram of installed system
• Battery manufacturer and model
• A description of the issue and when it started
• Any fault or warning codes shown on the inverter or in MySolArk
• Photos of the installation, wiring, inverter screen or error message when relevant
• Access to the inverter/system while speaking with Technical Support, whenever possible
• Your MySolArk account/site information if the issue involves monitoring or connectivity

Your inverter ID and serial number may be found in several locations, depending on your inverter model:

• Equipment label: Check the identification label on your inverter.
• Inverter display: On some models, the serial number can be found on the inverter screen at the bottom right of the settings menu screen, in the same system information area where the firmware version is displayed.
• MySolArk: In MySolArk v2, you can find your inverter information under Manage My Plant.

Yes. Being at the system allows you or your installer to check settings, indicator lights, wiring and system behavior while working with Technical Support.

Installation Manuals, Data Sheets Quick Start Guides, App Notes and other documentation can be found on the Sol-Ark Product Document Library.

Safety Warning: Before startup, ensure the inverter and system have been installed, wired, and inspected in accordance with the applicable installation instructions, electrical codes, and safety requirements. Installation and startup should only be performed by qualified personnel. Do not energize the system if wiring is incomplete, connections are loose, equipment is damaged, or any unsafe condition is present.

Before powering on your Sol-Ark inverter, review and follow the installation and startup instructions in the Quick Start Guide for your specific inverter model. View the Quick Start Guide.

Before engaging the grid power to the inverter, verify the inverter’s grid settings matches the site’s electrical service.

Professional installers with compatible residential systems can use the MySolArk Installer App, which provides guided commissioning covering system topology, connectivity, hardware validation, battery configuration, grid settings, operating profiles and final system verification. Professional installers with compatible commercial & industrial systems can use the MySolArk V1 app for commissioning systems. Note: C&I systems should be available to commission in the MySolArk Installer App starting in December of 2026.

Adding battery storage gives you more control over how and when you use energy. A battery can store excess solar or grid energy for later use, helping provide backup power during outages while also supporting everyday energy management and potential utility savings.

Depending on your system design and utility rate plan, adding a compatible battery can help you:

• Keep essential loads powered during outages – Store energy for backup power when the grid goes down.
• Maximize solar self-consumption – Store excess solar production during the day and use it later instead of sending it back to the grid.
• Reduce peak energy use – Use stored energy during higher-cost or high-demand periods to help reduce grid consumption and support peak shaving.
• Optimize time-of-use rates – Charge and discharge your battery around utility rate periods to help shift energy consumption away from more expensive times.
• Integrate a generator – Sol-Ark hybrid inverters support generator integration and controls, allowing a generator to work alongside solar and battery storage as part of a more resilient energy system.
• Track energy usage with CTs – Current transformers (CTs) allow the system to measure energy flowing to and from the grid and your home, giving you greater visibility into consumption, solar production, and overall system performance.
• Gain greater energy flexibility – Adjust battery reserves and energy-use strategies based on whether your priority is backup power, self-consumption, or energy-cost management.

Battery installation varies depending on your Sol-Ark inverter and battery model. Batteries connect to the inverter through the designated battery terminals, while supported lithium batteries may also use a communication connection to share information with the inverter.

Always follow the installation instructions for your specific Sol-Ark inverter and the battery manufacturer's requirements for wiring, protection, communication and system configuration.

For professional installers, the MySolArk Installer App can also guide you through battery configuration during commissioning on compatible residential systems.

Sol-Ark offers battery solutions for both residential and commercial energy storage applications.

• Residential: Sol-Ark residential hybrid inverters feature a flexible 48V battery architecture designed to work with a wide range of battery manufacturers. Battery compatibility, closed-loop communication, and system certification can vary by inverter and battery model. Sol-Ark currently works with more than 25 battery suppliers and partners for its 48V residential platform. Before selecting or installing a battery, check our current Certified Battery Partners and confirm the specific system configuration with the battery manufacturer or Sol-Ark Technical Support. View available battery partners.
• Commercial & Industrial (C&I): Sol-Ark offers its own high-voltage commercial battery energy storage solutions designed to pair with compatible Sol-Ark C&I hybrid inverters. The L3 Series LimitLess™ Battery Energy Storage System (BESS) provides an integrated Sol-Ark inverter and battery solution for applications such as backup power, peak shaving, energy cost management, solar self-consumption, and other commercial energy strategies.

Battery and inverter compatibility depends on the specific model, system configuration, and application. Consult the applicable Sol-Ark product documentation or contact Sol-Ark for assistance designing a C&I energy storage system. Sol-Ark can provide system design guidance but does not provide Professional Engineer (PE) stamped plans for Residential or C&I projects.

Supported lithium batteries can communicate with the Sol-Ark inverter to provide information such as battery State of Charge (SOC) and operating limits. Communication requirements vary by battery manufacturer and model, including the required cable, communication protocol and battery configuration. Follow the battery manufacturer's instructions, Sol-Ark's LV and HV Battery Integration Guides and your Sol-Ark inverter installation manual when setting up battery communication.

Professional installers commissioning compatible residential systems can also use the MySolArk Installer App's battery configuration workflow.

Residential: Yes. Depending on the inverter and battery configuration, Sol-Ark residential inverters can operate without closed-loop battery communication by managing the battery based on voltage and configured charge/discharge parameters.

The MySolArk Installer App supports commissioning for both open-loop and closed-loop battery configurations in residential systems. For open-loop batteries, the app provides a guided commissioning wizard that walks installers through voltage-mode setup and configuration.

The MySolArk v2 Mobile and Web Apps, as well as the Installer App, support monitoring of residential open-loop battery systems operating in voltage mode. Without closed-loop communication, the inverter does not receive battery information such as State of Charge (SOC) directly from the battery's Battery Management System (BMS). Battery settings must therefore be configured according to the battery manufacturer's specifications. Confirm that your battery supports open-loop/voltage-mode operation before configuring the system.

Commercial & Industrial (C&I): No. Sol-Ark commercial inverters and batteries must use closed-loop battery communication and cannot be operated in voltage mode. Proper communication between the inverter and battery BMS is required for system operation, monitoring, protection, and control.

Always follow the installation and configuration requirements for your specific Sol-Ark inverter and battery system. Contact your installer, battery manufacturer, or Sol-Ark Technical Support if you're unsure about the appropriate configuration.

Time-of-Use (TOU) settings allow you to control how your battery is used at different times of day. For example, you can preserve battery capacity for backup, use stored energy during higher-cost utility periods, or charge the battery during designated periods.

TOU schedules can define time periods, battery charge/discharge targets and power limits. The appropriate settings depend on your utility rate plan and how you want your system to operate. TOU controls battery usage while utility power is available and works in conjunction with the inverter's operating mode.

View Sol-Ark's TOU Guide for more information on how to set TOU up for your battery. Compatible residential systems can also use the visual Time-of-Use builder in the MySolArk Installer App. C&I systems will be available in the MySolArk app starting December 2026.

Sol-Ark hybrid inverters support generator integration for backup power and battery charging on compatible systems. The MySolArk Installer App provides guided wizard for setting up generator operations.

Generator configuration depends on your inverter model, generator and desired operating behavior. Settings may include generator charging, power limits and automatic generator start/stop where supported. Two-wire generator start requires compatible battery integration to enable start/stop functionality.

Because generator connections involve system wiring and operating parameters, refer to the installation manual for your specific inverter and your generator manufacturer's requirements. A qualified installer should perform generator installation and commissioning.

Sol-Ark systems can be designed for whole-home backup or to back up selected critical loads, depending on the inverter, battery capacity, electrical service, and overall system design.

With whole-home backup, the system is designed to support the home's backed-up electrical system during a grid outage, subject to inverter output capacity, available battery energy, solar production, and home demand.

With critical-load backup, selected circuits—such as refrigeration, lighting, communications, or other essential loads—are placed on a dedicated backup loads panel. During an outage, those circuits remain powered while non-backed-up circuits do not. If installed correctly, the generator terminal can also be utilized to shed loads based on battery SOC, grid status, and PV power (residential only). The MySolArk Installer App provides a guided, illustrated walkthrough during commissioning to help installers configure both whole-home and critical-load backup methods.

Your installer should determine the appropriate configuration based on your home's electrical service, expected loads, inverter capacity, battery capacity, and desired backup duration.

Your battery may not charge if it has already reached its configured State of Charge (SOC) limit, there is not enough available solar energy, grid or generator charging is disabled, or your Time-of-Use settings are preventing charging at that time. If the battery should be charging, check for any active warnings or faults and confirm that the battery is online and communicating with the inverter. Battery charge and voltage settings must also match the battery manufacturer's requirements.

To confirm the Closed Loop communications are working, on the inverter screen select the Gear Icon, then Li-Batt Info. You should see values coming from the BMS. If you only see zeroes on the screen, the communication is not functioning. If the issue continues, contact your installer or Sol-Ark Technical Support.

Your battery may not discharge if it has reached its minimum State of Charge (SOC) or backup reserve, battery discharge is restricted by your current operating mode or Time-of-Use schedule, or available loads are being supplied by solar or the grid instead.

Battery protection limits can also restrict discharge. Check your battery SOC, current operating mode, Time-of-Use settings and the system's event or alarm history. Your MySolArk app should provide visibility into power flow, equipment status and system events on compatible systems.

If the battery is available but consistently does not discharge when expected, contact your installer or Sol-Ark Technical Support.

A small amount of grid usage can be normal depending on system configuration and changing household loads. Your system may also intentionally use grid power because of its operating mode, Time-of-Use schedule, minimum battery SOC or backup reserve settings.

For example, the system may preserve stored battery energy for backup rather than discharging it to serve loads. Review your current battery SOC, backup reserve, Time-of-Use schedule and operating mode to make sure they match how you want your system to operate. Your MySolArk app supports monitoring and configuration of backup-power and Time-of-Use strategies on compatible systems.

Your Sol-Ark system may export power to the grid for several reasons, including:

• Excess solar production: Solar production is greater than the power needed by your home or business, and the battery cannot or does not need to accept additional energy.
• AC-Coupled Microinverters: If AC-coupled microinverters are connected to the Sol-Ark system, excess solar production from the microinverters may be exported to the grid after the system’s loads and battery charging needs are met.
• Time-of-Use (TOU) / Sell settings: Your system may be intentionally configured to discharge stored energy to the grid during certain times, such as higher-value rate periods. This type of configuration may be used with utility rate structures such as California NEM 3.0.
• Virtual Power Plant (VPP) participation: If your system is enrolled in a VPP or utility program, it may export energy during scheduled events based on the program requirements and your configured settings.
• System configuration: Export behavior can also depend on operating mode, export settings, battery State of Charge (SOC), and utility requirements.

If your system is exporting when it should be configured for limited or zero export, contact your installer to verify the system configuration and current transformer (CT) installation. Incorrectly installed or configured CTs can affect how the inverter measures and manages power flowing to and from the grid.

Solar production varies with sunlight, weather (snow covered), shading, and seasonal changes in the sun’s angle. If your system is showing no PV production during daylight hours, first check your MySolArk app or the inverter for active warnings or faults.

Other potential causes include the PV disconnect being turned off, PV voltage being outside the inverter's operating range, or an installation or wiring issue. If there is no obvious system warning or disconnect issue, contact your solar installer or Sol-Ark Technical Support.

If you believe the solar array is producing but your Sol-Ark shows zero PV input, check whether the PV disconnect is on and review the inverter or your MySolArk app for warnings or faults.

The inverter must receive PV voltage within the allowable range for your specific model before it can begin producing power. Wiring, polarity, disconnects or other installation conditions can also prevent the inverter from detecting the array. An issue with the rapid shutdown system or transmitter may also interrupt PV output and prevent the inverter from receiving the expected PV voltage. The required PV operating range varies by inverter model, so refer to the installation manual on the Product Document Library for your specific product.

If the array is known to be energized but still shows zero production, have your installer troubleshoot the PV input.

Sol-Ark inverters continuously monitor the utility grid and may disconnect when grid voltage or frequency moves outside permitted operating limits. This can occur during an outage, brownout or other grid disturbance.

Depending on the condition, the inverter may reconnect automatically after the grid stabilizes and the required reconnection period has passed.

If the inverter repeatedly connects and disconnects while utility service appears normal, contact your installer or Sol-Ark Technical Support. Installation or configuration issues can also cause repeated grid disconnections. If the issue persists after system-side causes have been ruled out, you may need to contact your utility service provider to verify grid conditions on its distribution network.

Backup performance depends on more than the inverter's rated power. Your available backup power and runtime depend on your inverter capacity, battery capacity and State of Charge, solar production, household loads, battery discharge limits and system design.

Large loads such as HVAC equipment, water heaters, pumps and EV chargers can significantly affect available backup capacity and runtime.

If your system cannot support the loads you expected during an outage, contact your installer to review the original system design, backed-up loads and available battery capacity.

Your Sol-Ark automatically manages energy from solar, batteries and the grid based on system conditions and your configured settings. What appears to be unexpected switching may result from changes in solar production, household demand, battery State of Charge, backup reserve, Time-of-Use schedules or changes in grid conditions.

Start by reviewing the power-flow screen and event history your MySolArk app to see what was happening when the transition occurred.

If the system frequently switches between sources without an apparent reason, contact your installer or Sol-Ark Technical Support to review the system configuration.

An inverter may shut down or restart in response to an overload, battery condition, grid event, system fault or software/firmware update. Some protective events clear automatically once operating conditions return to normal.

Check the inverter or your MySolArk app for faults, warnings or events that occurred around the time of the restart. Your MySolArk app should provide system event history for troubleshooting.

If shutdowns or restarts happen repeatedly, contact Sol-Ark Technical Support rather than repeatedly power-cycling the system. Note the approximate date and time of the event before contacting support. This can help Technical Support review system events and operating conditions around the occurrence.

Generator operation depends on your inverter model, generator capabilities and system configuration. Battery integration is required for the inverter to accept the generator power.

If automatic generator start is not working, confirm that the generator itself is ready to operate and that generator operation is enabled/configured as intended.

Compatible automatic-start configurations also require the appropriate generator control connection.

If the generator starts but does not charge the batteries, the system's generator charging settings, battery limits or generator input conditions may be preventing charging. Have your installer verify the configuration or contact Sol-Ark Technical Support.

Some inverter sounds are normal. Fans may turn on and off as the inverter manages temperature, and you may hear clicks when internal relays change operating states. If you hear a new, unusually loud, persistent or abnormal sound—especially if it is accompanied by an alarm, fault, loss of power, excessive heat, smoke or an unusual odor—do not attempt to open or repair the inverter yourself.

Check the inverter or your MySolArk app for active alarms or faults. Review the System Alarms menu when the system is beeping or indicating an alarm.

If you see smoke, smell burning or believe there is an immediate electrical hazard, follow your system's emergency shutdown procedures and contact the appropriate qualified service professional.

If your Sol-Ark system includes batteries and is configured for backup power, it should transition to battery/solar operation when utility power is unavailable, subject to available battery energy, solar production, inverter capacity and system configuration.

After utility power returns, the inverter will monitor the grid before reconnecting. A short delay before reconnecting can be normal.

After an outage:

• Check that the system has returned to normal operation.
• Review battery State of Charge and current power flow.
• Check your MySolArk app or the inverter for active warnings, faults or events.
• Confirm that expected loads are operating normally.

Grid voltage and frequency disturbances associated with outages can cause the inverter to disconnect and then automatically recover after grid conditions stabilize. If the inverter does not reconnect, backup loads remain without power, or an alarm or fault remains active after grid service has stabilized, contact your installer or Sol-Ark Technical Support.

MySolArk V2 supports system alerts and notifications to help you stay informed about your system.

Make sure notifications are enabled for MySolArk V2 in your mobile device settings and review the notification options available within MySolArk.

Because an internet or communications outage can prevent system data from reaching MySolArk, we also recommend periodically checking that your system shows Online in the app.

If your inverter shows Offline in your MySolArk app, the most common cause is a loss of communication between the inverter's communications device and the internet. The inverter may still be operating normally even when monitoring is offline.

Check that your home internet is working, the inverter is powered on, and the Wi-Fi or communications dongle is powered and connected. For Wi-Fi connections, Sol-Ark systems require a compatible 2.4 GHz Wi-Fi network; 5 GHz is not supported for the Wi-Fi dongle.

If your Wi-Fi network name or password recently changed, you'll need to reconnect the inverter to the network. If everything appears to be connected correctly but the system still shows Offline, remove the screws securing the communications dongle to the inverter, then unplug the dongle. Wait 30 seconds, reconnect the dongle, and secure it to the inverter with the screws. Wait at least five minutes for the connection status to update in MySolArk. If the system remains offline after confirming internet connectivity, contact Sol-Ark Technical Support.

You can reconnect a compatible inverter using the Wi-Fi configuration tool in your MySolArk app.

In your MySolArk app, navigate to Me → Tools → Wi-Fi Configuration, select or scan for the inverter's communications device, and follow the prompts to connect it to your local Wi-Fi network. Select your 2.4 GHz Wi-Fi network, enter the Wi-Fi password and confirm the connection.

After configuration, allow several minutes for the communications device to reconnect and begin reporting data to MySolArk.

If you change your Wi-Fi network name, password or router, your inverter's communications device will need to be connected to the new network.

In MySolArk v1: Open your MySolArk app and navigate to Me → Tools → Wi-Fi Configuration, then follow the prompts to select your new 2.4 GHz network and enter the new password.

Changing your home's Wi-Fi settings does not require you to create a new MySolArk account or plant. Once the communications device reconnects to the internet, it should resume reporting to your existing system.

Temporary connectivity interruptions can cause monitoring data to be delayed or unavailable because system data must be transmitted from the inverter to MySolArk.

If you see missing historical data, unexpected zero readings or information that does not match your system's actual operation, first confirm that the system is currently online. Check the Wi-Fi signal strength at the inverter and confirm that your router or modem is operating normally. A weak or intermittent connection can prevent system data from being transmitted reliably to MySolArk.

If the issue continues, contact Sol-Ark Technical Support and provide the affected date/time range, screenshots and the type of data that appears incorrect. This information can help the team investigate the issue.

MySolArk displays data reported by your inverter and connected system components. Differences between what you expect and what is displayed can occur because household loads and solar production change quickly, while monitoring data is reported and refreshed at intervals.

If the values are consistently incorrect rather than temporarily different, the system configuration or installation may need to be checked. For example, the placement, orientation or configuration of current sensors can affect how grid import, export and household consumption are measured.

Check the system's current status and historical data to determine whether the issue is temporary or consistent. If power-flow values remain incorrect, contact your installer or Sol-Ark Technical Support.

MySolArk relies on an internet connection to transmit system data. Temporary internet interruptions, weak Wi-Fi, communications-device connectivity, or other network conditions can cause data to appear delayed or temporarily unavailable. First, confirm that the system shows Online and that your internet connection is working. If the system is offline, restore its network connection and allow time for MySolArk to reconnect and synchronize.

Sol-Ark’s current MySolArk platforms use synchronized system data, and existing historical production and consumption data remains available across supported MySolArk experiences. Data is currently reported in five-minute increments, so a two- to five-minute delay in reporting is normal.

If the data still appears out of sync after allowing time for synchronization, unplug the communications dongle and plug it back in, or press the “ESC” button below the inverter’s LCD screen. These steps may help restore data synchronization. After restarting the connection, allow several minutes for data to update in MySolArk. If data remains missing or out of sync after the system has been online and communicating normally, contact Sol-Ark Technical Support.

An Offline status in MySolArk does not necessarily mean your inverter has stopped operating. It can mean that MySolArk is no longer receiving data from the inverter because of an internet, network or communications-device issue.

Check the inverter itself to confirm its operating status and look for any active warnings or faults. If the inverter is operating normally but MySolArk remains offline, troubleshoot the internet/communications connection.

If the inverter itself is showing a fault or is not operating, contact Sol-Ark Technical Support.

In MySolArk, a system is organized as a plant. When setting up a new system, select Create Plant and follow the prompts to enter the site information and register the system's communications gateway.

Depending on your equipment, you can scan the QR code on the communications device or enter its serial number and registration key manually. You'll then be guided through network configuration to bring the system online.

If you are adding an inverter to an existing system, you can add the new communications dongle to your existing plant. In MySolArk, open the Equipment tab for the plant and select Add in the upper-right corner. Enter the dongle serial number and KEY printed on the dongle when prompted.

To connect the new dongle to a network, you must be onsite with the system. Follow the network connection instructions in the applicable Quick Start Guide to complete the connection and bring the new equipment online.

Professional installers commissioning compatible residential systems can also use the MySolArk Installer App, which supports gateway registration, site creation and connectivity verification as part of the commissioning workflow.

MySolArk allows plant access to be shared with system owners, installers and system managers, so multiple authorized users can access the same system without sharing account credentials.

Installers using the MySolArk Installer App can also share plant access with the homeowner after commissioning is complete. The homeowner can then use their own MySolArk account to monitor the system.

The State of Charge (SOC) displayed by your Sol-Ark system is based on information provided by the battery's Battery Management System (BMS) when closed-loop communication is being used. If the displayed SOC appears incorrect, possible causes include a battery communication issue, battery imbalance, recent changes to the battery bank, or the battery's SOC calculation needing time to recalibrate. For systems operating without closed-loop battery communication, SOC is estimated based on battery voltage and may be less precise.

Check for battery or communication warnings and compare the SOC shown by Sol-Ark with the information reported directly by the battery, if available. If there is a significant or persistent difference, contact your battery manufacturer, installer or Sol-Ark Technical Support.

A battery communication error means the inverter is not receiving the expected information from the battery's Battery Management System (BMS).

Common causes include a disconnected or incorrect communication cable, incorrect battery communication settings, the battery being offline, incompatible firmware or an issue within the battery's BMS.

Check that the battery is powered on and review both the battery and inverter for active warnings or faults. Because communication requirements vary by battery manufacturer and model, refer to the battery manufacturer's instructions before changing communication settings or cables.

If communication was previously working and the error persists, contact your installer, battery manufacturer or Sol-Ark Technical Support.

A battery stopping below 100% does not necessarily indicate a problem. In an outage or with an off-grid system, generator charging or AC-couple charging does not charge to 100%. The battery's BMS may limit or stop charging based on cell voltage, temperature, battery balancing or other protective limits. Your Sol-Ark settings, Time-of-Use schedule or configured charge limits may also prevent the battery from fully charging.

The SOC displayed by the system can also differ slightly from the battery's actual available capacity, particularly while the BMS is balancing or recalibrating. Check for battery warnings or faults and confirm that your charge settings follow the battery manufacturer's recommendations. If the battery consistently stops charging significantly below its expected SOC, contact your battery manufacturer or installer.

Your system may stop using battery power when the battery reaches its configured minimum State of Charge (SOC) or reserve level. This reserve helps preserve battery capacity for backup power and can also help protect the battery from excessive discharge.

The battery's own BMS can also stop or limit discharge based on its internal protection settings, temperature, voltage or other operating conditions. If the battery stops discharging at a higher SOC than expected, review your minimum SOC/reserve and Time-of-Use settings and check for battery warnings or faults. Keep in mind that the battery's BMS may override inverter commands when necessary to protect the battery.

The minimum battery State of Charge (SOC), sometimes referred to as your battery reserve, determines how much stored energy your system keeps available rather than using it for normal energy needs.

On compatible systems, battery reserve and Time-of-Use settings can be managed through MySolArk. Increasing the reserve keeps more battery capacity available for backup, while lowering it allows more stored energy to be used during normal operation.

The available settings and allowable minimum SOC may depend on your battery and system configuration. Never set the minimum SOC below the battery manufacturer's recommended limit.

In many cases, yes, but battery expansion needs to be evaluated based on your existing battery system, inverter, battery manufacturer and system design. Before adding batteries, confirm that the battery manufacturer supports expanding an existing battery bank and review requirements for maximum system size, battery age, model, firmware, State of Charge and electrical configuration. Some manufacturers may have specific requirements for adding new batteries to an existing system.

Whenever possible, use the same battery model and type already installed. If the existing battery is no longer available or compatible, replacing the entire battery bank with a compatible solution may be necessary. Mixing batteries with different chemistries, capacities, communication protocols, or other specifications can create compatibility, charging, balancing, and performance issues and may cause more problems than the additional capacity solves.

For residential systems using a third-party battery partner, follow that battery manufacturer's expansion requirements.

For Sol-Ark C&I systems using Sol-Ark HV or HVR batteries, follow the applicable Sol-Ark system design and installation requirements.

We recommend having your installer evaluate the existing system before adding battery capacity.

Generally, batteries from different manufacturers or different battery models should not be combined within the same battery bank unless the battery manufacturers and the applicable system documentation specifically approve that configuration.

Different batteries can have different voltages, BMS behavior, charge/discharge limits, firmware and operating characteristics. Combining incompatible batteries can result in poor system performance, communication problems or battery protection events.

For residential systems, follow the battery manufacturer's requirements for approved battery configurations and expansion. For Sol-Ark C&I systems, use the specified Sol-Ark HV or HVR battery configuration for the applicable system.

PV string voltage and current must stay within the limits specified for your specific Sol-Ark inverter and each MPPT input.

When designing a PV string, your installer should verify the modules' open-circuit voltage (Voc), operating voltage (Vmp), short-circuit current (Isc), operating current and total PV power against the inverter's specifications. Temperature must also be considered because PV voltage can increase significantly in cold weather.

Do not assume the limits are the same across Sol-Ark inverter models. For example, the Limitless 18K currently specifies a maximum PV source-circuit voltage of 500VDC and specific current limits per MPPT.

Sol-Ark provides a Solar Design Tool, powered by OpenSolar that can help installers design and model systems.

Your Sol-Ark may intentionally reduce solar production when the system cannot use or send additional energy.

This can happen when the batteries are full or cannot accept additional charging power, household demand is low, grid export is disabled or limited, or the inverter has reached an operating or power limit. Utility or grid requirements can also affect how much energy the system is permitted to export.

PV production can also be limited by the array configuration. For example, exceeding an MPPT's usable current can cause the inverter to self-limit rather than use the additional available current.

If production is consistently lower than expected, review battery SOC, system operating mode, export settings, PV input values and any active warnings or faults.

Your system may not export if Grid Sell is disabled, the system is configured for limited/zero export, the batteries are charging, or there is not enough excess solar production after serving your loads.

Export behavior also depends on your system configuration and utility requirements. Some systems are intentionally configured not to send power back to the utility.

If your system should be exporting but isn't, your installer should verify the operating mode, export settings and CT sensor installation. Sol-Ark uses CT sensors to measure power moving to and from the grid, and correct CT location and polarity are important for export-control functions.

Sol-Ark inverters support operating modes designed to limit or prevent power from being exported to the utility grid. The appropriate configuration depends on your system design and application.

Limited Power to Load: For whole-home backup applications using a single inverter, Limited Power to Load can provide similar functionality without requiring external CTs.

Limited Power to Home: This mode uses CT sensors installed at the grid connection to measure power entering or leaving the property. The inverter adjusts its output based on those measurements. Correct CT placement, orientation, and configuration are essential for proper operation.

Self-consumption: Time of Use (TOU) must be enabled for the batteries to discharge and support self-consumption.

Preventing export: There is no separate Zero Export Power setting. To prevent intentional export, turn Solar Sell off and do not enable Battery Sell within the TOU settings.

Limited export: Limited-export configurations utilize the inverter's Power Control System (PCS) functionality together with the Solar Sell Watts setting to control the amount of power that can be exported to the grid.

Export-control requirements can vary by utility, jurisdiction, system configuration, and inverter model. Your installer should configure the system according to the approved interconnection requirements and the installation documentation for your specific Sol-Ark inverter.

A small amount of grid import can be normal, particularly when your system is configured for zero-export or limited-export operation.

Household loads can change almost instantly, while the inverter continuously adjusts its output in response. Maintaining a small amount of grid import also provides a buffer to help prevent brief, unintended exports to the utility.

Sol-Ark's current sensors have a measurement tolerance. Sol-Ark recommends configuring a small Zero Export Power value when the goal is to avoid exporting to the utility.

If grid import is consistently much higher than expected, check your battery SOC, operating mode and Time-of-Use settings, and have your installer verify CT sensor placement and configuration.

Many Sol-Ark hybrid inverters support generator integration for battery charging and backup power, but the connection method and supported generator capacity depend on the inverter model.

On compatible residential systems, a generator may connect through the inverter's dedicated GEN input. Larger generators may require a different configuration, such as connection through the GRID input. Generator voltage, frequency, capacity and configuration must meet the requirements of your specific inverter.

For automatic generator operation, compatible systems can use a two-wire start connection. A compatible battery must be installed and properly integrated with the Sol-Ark inverter for two-wire automatic generator start/stop operation. Generator charging can then be configured to start based on battery voltage or State of Charge. If Time-of-Use is enabled, the appropriate charging periods must also be configured for automatic generator charging to occur.

Because generator integration involves high-voltage wiring and model-specific settings, installation and configuration should be performed by a qualified installer using the manual for your specific Sol-Ark inverter.

Sol-Ark is compatible with many generators, but compatibility depends on the Sol-Ark inverter model, generator output and how the generator will be integrated.

For residential systems using the dedicated GEN input, the generator typically must provide the voltage and phase configuration specified for that inverter. For example, the current Limitless 18K manual specifies 120/240V split-phase generators on its GEN terminals and recommends less than 15% total harmonic distortion (THD) to help avoid frequent disconnections. Generator size limits also vary by inverter.

If you want the Sol-Ark to automatically start and stop the generator, the generator must support a compatible two-wire start function. A compatible battery must also be installed and properly integrated with the Sol-Ark inverter for two-wire automatic generator start/stop operation.

Before purchasing or connecting a generator, compare its voltage, phase, frequency, output capacity, THD and automatic-start capabilities with the requirements in the installation manual for your specific Sol-Ark inverter.

Automatic generator start requires both the inverter, generator, and battery system to be properly configured. On compatible systems, the generator must support two-wire start and be connected to the appropriate generator-start contacts on the Sol-Ark inverter. A compatible battery must also be installed and properly integrated with the inverter for two-wire automatic generator start/stop operation. The generator must be placed in its automatic or remote-start mode when required.

The Sol-Ark inverter can be configured to request generator operation based on conditions such as battery State of Charge (SOC) or battery voltage. If the generator isn't starting automatically, check that:

• The generator is ready and set to automatic/remote operation.
• The two-wire start connection is installed correctly.
• Generator charging and start thresholds are configured.
• The battery has actually reached the configured generator-start condition.
• There are no active generator, battery or inverter faults.

Some Sol-Ark models also provide a generator-force/test function that installers can use to verify the auto-start connection.

If the generator can start manually but not through the inverter, contact your installer or Sol-Ark Technical Support.

Your battery reserve determines how much stored energy your system keeps available instead of using it for everyday energy needs.

On compatible systems, battery usage can be controlled through Time-of-Use (TOU) settings by specifying the minimum battery State of Charge (SOC) allowed during different periods of the day. Once the battery reaches the configured SOC for that time period, the system will stop discharging it for normal loads and use another available energy source.

A higher reserve keeps more battery capacity available for backup, while a lower reserve makes more stored energy available for everyday use.

Do not set the minimum SOC below the battery manufacturer's recommended operating limits.

Time-of-Use (TOU) allows you to control when and how your Sol-Ark uses battery energy while connected to the grid. TOU schedules can be configured with different time periods, battery SOC targets and maximum discharge power. Depending on the configuration, you can use TOU to:

• Use stored battery energy during higher-cost utility periods.
• Preserve a desired amount of battery capacity for backup.
• Charge the battery from an AC source during selected periods.
• Export stored energy during selected periods where permitted.

Solar energy will continue to charge the battery when available regardless of whether AC charging is selected in a TOU period. Professional installers can also configure compatible residential systems using the visual Time-of-Use builder in the MySolArk Installer App.

Because TOU settings affect how your battery, solar and grid work together, make sure your schedule matches your utility rate plan and backup-power goals. View Sol-Ark TOU Guide to better understand this set up and the available settings.

Your Sol-Ark automatically manages available solar, battery and grid power based on the system's operating mode and settings.

The default work mode for systems with batteries is Battery First meaning that solar is first used to recharge the batteries, then cover loads, and then export to the grid if Grid Sell is enabled.

The Time-of-Use (TOU) feature allows you to use stored battery power first before pulling power from the grid. The schedule allows you to choose the amount of power that can be used from the battery down to a set State of Charge (SOC) or battery voltage level.

When Time-of-Use is disabled, the battery is set for back-up power use only.

Your operating mode, battery reserve, TOU schedule, grid-charging settings and export settings work together to determine how energy is prioritized.

Battery settings depend on the battery manufacturer, model, capacity and communication method. There is not one set of battery settings that is appropriate for every battery connected to a Sol-Ark inverter.

Important settings can include maximum charge and discharge current, battery capacity, minimum State of Charge, charging parameters and whether the system uses closed-loop BMS communication. Sol-Ark's inverter settings allow these parameters to be configured, but their appropriate values depend on the battery being used.

For residential systems using one of Sol-Ark's supported battery partners, follow the battery manufacturer's requirements for your specific model. Compatible batteries commissioned through the MySolArk Installer App may also support simplified battery configuration.

For Sol-Ark C&I systems using Sol-Ark HV or HVR batteries, use the settings and configuration specified in the applicable Sol-Ark installation documentation. Current product documentation for both HV and HVR systems is available in the Sol-Ark Product Document Library.

When in doubt, contact your battery manufacturer, installer or Sol-Ark Technical Support before changing battery parameters.

Some inverter settings directly affect battery operation, grid interaction, export behavior, generator operation and system safety. Incorrect settings can cause unexpected system behavior or prevent the system from operating as intended. Homeowners can safely manage supported user-facing features such as monitoring and appropriate energy-management settings through MySolArk.

However, advanced inverter, battery, grid, generator and commissioning settings should generally be configured by a qualified installer or with guidance from Sol-Ark Technical Support.

Grid-related settings are especially important because they may be determined by your utility's interconnection requirements and applicable grid profile. If you're unsure what a setting controls, do not change it until you've reviewed the documentation for your specific inverter or contacted your installer or Sol-Ark Technical Support.

You can check your inverter's current software/firmware version directly on the inverter or through MySolArk.

On supported inverters, select the gear/settings icon on the inverter display. The current COMM and MCU software versions are shown at the bottom-right of the screen. You can also view the software version from the Equipment section in MySolArk.

You can compare your installed version with the current version listed on Sol-Ark's Firmware & Software Updates page. Older or legacy inverter models may not support the latest software or firmware versions available for newer models. A different version does not necessarily mean that an update is required or available for your inverter.

No. Sol-Ark does not automatically update your inverter's firmware. Firmware updates are performed when needed and should follow Sol-Ark's recommended update process. Contact Sol-Ark Technical Support if you have questions about your current firmware version or believe an update may be required.

Sol-Ark inverter firmware updates are scheduled through Sol-Ark.

First, check your inverter's current software version and compare it with the version listed on the Firmware & Software Updates page. If an update is available, submit the Software Update Request Form to request the update for your system.

Once the update has been scheduled and completed, check your inverter or MySolArk to confirm that the new software version is installed. Try checking approximately 30–40 minutes after the scheduled update.

Not necessarily. You can begin by checking the inverter for active faults or warnings and reviewing when the issue started.

However, firmware can affect system operation, communications, monitoring and compatibility with newer Sol-Ark software. For example, MySolArk V2 requires minimum supported inverter, communications-device and dongle software versions.

As part of troubleshooting, check your current firmware against the version listed for your inverter on Sol-Ark's Firmware & Software Updates page. If an update is available, Sol-Ark Technical Support may recommend updating the system before continuing with troubleshooting.

Firmware updates are intended to update the inverter's software, but system configuration should always be verified after an update, particularly if your system uses customized battery, Time-of-Use, grid, generator or export settings. Before an update, installers should document important system settings when appropriate. After the update, confirm that the system is operating as expected and review critical settings if system behavior appears different.

If you're unsure whether an update could affect a specific configuration, contact Sol-Ark Technical Support before scheduling the update.

If the firmware version has not changed after the expected update period, first confirm that the inverter is powered on and connected to the internet. Check the current COMM and MCU versions on the inverter or in MySolArk to determine whether the update completed. Try checking approximately 30–40 minutes after the scheduled update.

If the update did not complete, do not repeatedly restart the inverter or attempt to install firmware files from an unofficial source. Contact Sol-Ark Technical Support for assistance and have your inverter model, inverter ID/serial number and current COMM/MCU versions available.

Warranty coverage depends on your specific Sol-Ark product, purchase date and applicable Limited Warranty. You can find the warranty for your inverter on the Sol-Ark Warranty Registration page, or the Sol-Ark Product Document Library. You will need to register your product (if you haven’t already), which helps verify warranty coverage and streamline future warranty claims.

For many current residential Sol-Ark inverters, the Limited Warranty is 10 years, beginning on the initial purchase date or the date the product was received by the end user, whichever is later, as documented by the applicable proof of purchase. Specific components or products may have different coverage periods, so always review the warranty for your model.

If you're unsure whether your inverter is still covered, contact Sol-Ark Technical Support with your inverter model, serial number and proof of purchase.

To submit a warranty claim, please reach out to Sol-Ark Tech Support. To help Sol-Ark evaluate a warranty claim, have the following information available:

• Inverter model and serial number
• Proof of purchase, such as the original invoice or receipt
• Description of the issue
• Shipping address for repaired or replacement equipment
• Any relevant fault codes, photos or system information requested by Technical Support

Sol-Ark Technical Support must also validate the reported issue before an RMA can be issued.

Having this information ready before contacting Technical Support can help speed up the troubleshooting and warranty process.

Start by contacting Sol-Ark Technical Support. A Technical Support representative will troubleshoot and validate the issue and determine the appropriate next steps. If the product needs to be returned, repaired or replaced, Sol-Ark will provide a Return Material Authorization (RMA) number and instructions for the next steps. Do not return equipment to Sol-Ark without prior authorization and an RMA number. Have your inverter model, serial number, proof of purchase, description of the problem and shipping information available when starting the process.

If you already have an open support case or RMA, have your case or RMA number available when contacting Sol-Ark Technical Support. Our team can confirm the current status and let you know if additional information or action is required. If replacement equipment has been authorized, Technical Support can also provide the latest available information regarding fulfillment and shipment.

Yes. Your installer can work with Sol-Ark Technical Support to troubleshoot your system and assist with a warranty or RMA request.

This can be particularly helpful when troubleshooting requires installation details, electrical measurements, system configuration or on-site work. Sol-Ark's documentation specifically contemplates installers working with Technical Support and, for some warranty processes, receiving replacement equipment when authorized by the system owner.

You can also contact Sol-Ark Technical Support directly as the system owner.

If you believe your inverter needs to be replaced, contact Sol-Ark Technical Support before removing or returning the equipment. Technical Support will troubleshoot the issue and determine whether repair, replacement or another solution is appropriate.

If a replacement is authorized, Sol-Ark will provide the applicable RMA and replacement instructions. Warranty remedies can include repair or replacement when Sol-Ark confirms a covered defect, subject to the terms of the applicable product warranty. Once a replacement is authorized, keep your RMA/case number available for any status inquiries.

A qualified installer should handle inverter removal and replacement. After installation, confirm that the replacement inverter is properly commissioned, connected to MySolArk and registered as required.

Some technical issues require additional troubleshooting, system data or review by a specialized support team.

If you already have an open case, reference your existing case number when contacting us rather than starting a new request. This helps our team keep troubleshooting history, system information and previous actions connected to the same issue.

If your system is still down or the issue remains unresolved, let the Technical Support representative know so the case can be reviewed for the appropriate next step.

Sol-Ark Technical Support first works to identify the cause of the reported issue. This may include reviewing inverter data, fault history, system configuration, installation information, photos or electrical measurements.

Warranty eligibility is then determined according to the Limited Warranty applicable to your product. If additional information is needed to determine the cause of a failure, Technical Support will explain what information is required.

If a claim is not covered, ask your Technical Support representative to explain the reason for the determination and the information used to reach it.