Compatible Batteries & Non-Compatible Batteries (S6-EH2P only)

Several battery models have been officially "matched" with the S6-EH2P(9.6-16)K-SV-YD-L-US series. In this context, a "matched" status signifies that the CAN communication protocols between the battery and inverter have been fully harmonized. Each pairing undergoes rigorous physical installation and validation, performed either by Solis or an authorized battery partner. 

This inverter does not support RS485 closed-loop communication with any batteries. Only CAN closed-loop communication is supported using the Solis proprietary CAN protocol or one of the Solis-approved CAN protocols (example: Pylontech). 

During the matching testing process, a comprehensive Solis Test Report is completed and reviewed by our R&D team to eliminate interoperability risks. This rigorous validation allows Solis to guarantee a seamless, worry-free installation experience for our customers.

This represents the "Preferred Path." While selecting a battery from the official Compatibility List is the recommended standard for performance and reliability, we recognize that unlisted models are occasionally considered. This article outlines the alternative options available, and the specific caveats associated with each.

The official Solis Approved Compatible Battery List can be downloaded here: https://www.solisinverters.com/uploads/file/Solis-Battery_Matching-US-Pamphlet.pdf 

Please Note: This list is updated about once per month to reflect the new batteries that have been added. 

1. Solis Preferred Path: Approved Compatible Batteries (Closed-Loop CAN integration)

The most reliable way to ensure your system operates at peak efficiency is to select a battery from the Solis Approved Compatible Battery List. These batteries have undergone rigorous interoperability testing to ensure the communication protocols (CAN) are perfectly synchronized with each other.

• Communication: Closed-loop CAN (Active data exchange).
• Best for: New energy storage installations that are adding both PV and batteries at the same time
• Inverter Warranty: Maintained
• Performance: Optimal. The inverter receives real-time data on State of Charge (SOC), temperature, and voltage to manage charging cycles precisely. It also receives alarm data from the battery.
• Risk for the customer: Very low. All the equipment warranties are maintained and will be supported by after-sales service teams.
• Requirement: Select a battery from the official approved battery compatibility list and connect it to the inverter with a CAN communication cable. 

2. Open-Loop Integration (No Communication)

In scenarios where a battery does not have integrated communication (such as traditional lead-acid or certain simplified lithium-ion batteries), the inverter can be configured to operate in "Open-Loop" mode. Not all batteries support open-loop so please check with your battery manufacturer first to be sure they honor their warranty even when used in open-loop. 

• Communication: None. The inverter charges/discharges based on battery voltage and TOU settings only.
• Best For: Legacy energy storage systems or specific custom applications where the old inverter is being replaced by a new Solis hybrid. Best for cold-weather areas that use lead-acid batteries instead of lithium-ion.
• Inverter Warranty: Maintained
• Performance: Sub-optimal. There is no direct comms between the inverter and battery. The inverter cannot exercise automatic self-consumption like it can with a closed-loop battery.
• Risk for the customer: Moderate. The warranties are maintained, but the chances of issues arising increases since the inverter and battery do not have a communication channel. 
• Requirement: Do not connect a CAN communication cable between the BMS and the battery. Set up the inverter for open-loop communication. Check with the battery OEM that they allow the battery to be used in open-loop.

3. Closed-Loop Integration with Unverified Batteries (Warranty Voided)

Attempting to connect a battery via CAN that is not on the approved list and has not been tested by our engineering team is highly discouraged. This is to protect both Solis and Solis customers from potential interoperability issues that could arise since the pairing was never tested and vetted by us. If you want to pursue this path, it is best to obtain the battery CAN protocol from the battery OEM. Send this protocol to us at usservice@solisinverters.com and we can tell you if it matches any of the protocols we already support. This will increase performance, but the warranty will still be voided without the completion and approval of a Solis battery test report as explained in the next section.

• Communication: Closed-loop CAN (note: RS485 with the battery is not supported)
• Best for: Retrofits or inverter replacements where the inverter is being replaced with a Solis hybrid.
• Inverter Warranty: Voided
• Performance: Erratic. Without confirming compatible protocols, the system is highly likely to have issues.
• Risk for the customer: Very high. Incompatible communication protocols can lead to improper charging, battery damage, or system-wide faults. This configuration is considered a "high-risk” installation especially because the inverter warranty is voided when this path is pursued. 
• Requirement: The battery and inverter must both support CAN communication, ideally the same protocol.

4. Closed-Loop Integration with a Verified Solis Test Report (Warranty Maintained)

We recognize that the energy storage market is evolving rapidly. If you wish to use a closed-loop battery that is not yet on our approved list while keeping your warranty intact, you must undergo a formal verification process. Please submit a request to usservice@solisinverters.com to receive the Solis battery testing report. Fill this report out completely and then submit it to Solis for review. After the report has been approved, Solis will consider that battery model to be “officially compatible” and the inverter warranty will be maintained. 

• Communication: Closed-loop CAN 
• Best For: Large projects where many unverified batteries will be installed but the inverter warranty needs to also be maintained. 
• Inverter Warranty: Maintained, but only after approval of the report.
• Performance: Optimal. Exactly like the Preferred Path, perfect closed-loop comms.
• Risk for the customer: Very low. All the equipment warranties are maintained and will be supported by after-sales service teams.
• Requirement: The customer or battery manufacturer must submit a completed Solis Battery Test Report. This report is reviewed by our technical team; once the battery is officially approved for that specific installation, the warranty remains valid.

If you want to pursue Option 4. Closed-loop with Verified Testing (Warranty Maintained) but you are unable to conduct the testing and complete the test report yourself, please reach out to the battery manufacturer to see if they are willing and able to do the test report. If they are also unable and you would like to petition Solis to do it, please email usservice@solisinverters.com with your request. These types of requests are evaluated on a case-by-case basis with project size (business opportunity) heavily considered.

We are happy to share the Solis Compatibility Test Report, the Solis CAN protocol, or any other material that you would like. Please send in a request to usservice@solisinverters.com and we will quickly get back to you.