Solis S5-EH1P-L Inverter Battery Settings and Pairing Guide

Key Takeaways

• Always confirm your battery's compatibility with the Solis S5-EH1P-L inverter before connection.
• Lithium-ion batteries typically manage their own charge parameters through the BMS via CAN communication.
• Lead-acid batteries require careful manual configuration of multiple voltage and current settings.
• Incorrect battery settings can lead to system malfunction, battery damage, and may void your inverter's warranty.

How do I configure battery settings for my Solis S5-EH1P-L inverter?

The Solis S5-EH1P-L hybrid inverter series supports both compatible lithium-ion (Li-ion) and lead-acid batteries. Proper configuration is essential for safe and efficient operation. For Li-ion batteries, settings are often communicated automatically via the CAN port, while lead-acid batteries require manual configuration of parameters like Equalizing Voltage and Floating Voltage.

Diagnosis and Initial Checks

Before adjusting any settings, perform these checks to ensure your battery system is correctly recognized and functioning.

1. Check for "NO-Battery" Error: If the inverter displays "NO-Battery", it indicates the battery is not connected.

• • Meaning: The inverter does not detect a battery.
  • Action: Verify all battery cable connections are secure and correctly wired. Measure the battery voltage at the inverter connection point to ensure it is within the expected range for your battery type.

2. Check for "BatName-FAIL" Error: This error suggests a mismatch between the battery connected and the battery type selected in the inverter's settings.

• • Meaning: The inverter's internal configuration for the battery brand or model does not match the actual connected battery.
  • Action: Access the inverter's menu (Main menu → Advanced Settings → Password 0010) and confirm that the battery model selection is consistent with the actual battery installed.

3. Check for "CAN Fail" Error: For Li-ion batteries, this indicates a communication issue.

• • Meaning: Can failure is a failure of communication between inverter and battery.
  • Action: Check the CAN communication cable for proper connection at both the inverter and battery ends. Ensure you are using the correct cable, as some batteries require a special cable from the manufacturer.

4. Check for "OV-Vbatt" or "UN-Vbatt" Errors: These indicate battery overvoltage or undervoltage conditions.

• • Meaning: The battery voltage is outside its safe operating limits.
  • Action: Restart the system. If the fault persists, verify the battery voltage is within standards using a multimeter. Contact your battery manufacturer for further service if the battery itself is faulty.

Battery Configuration Troubleshooting

Battery Pairing and Settings

The Solis S5-EH1P-L inverter supports both lithium-ion and lead-acid batteries, each with distinct pairing and configuration requirements.

Compatible Lithium-ion Battery Models

The Solis S5-EH1P-L inverter is compatible with a range of lithium-ion battery models. Always refer to the specification of the battery before configuration. Using a non-compatible battery can lead to defects, damage, or collateral loss, which is not covered by the inverter's warranty.

Lithium-ion Battery Charge Settings

For lithium-ion batteries, the inverter communicates with the battery's BMS via the CAN Port. This port is used for CAN communication between inverter and lithium battery BMS. The BMS typically manages the specific charge and discharge voltage setpoints. You will primarily configure State of Charge (SOC) limits and current limits.

Lead-acid Battery Charge Settings

Lead-acid batteries are not recommended for general customers as they require experienced installers and technicians who can fully understand the battery parameters and configure the settings and installations correctly. Solis is not responsible for any potential damages caused by the use of lead-acid batteries.

For lead-acid batteries, manual configuration of detailed charge parameters is necessary. The following table provides example values; always consult your battery manufacturer's specifications for the correct settings.

These example values are referenced to an Environment Temp of Warm (25 degC). If your installation environment is Cold (5 degC) or Hot (40 degC), temperature compensation should be applied as per your battery manufacturer's guidelines.

Safety

Working with batteries and inverters involves significant electrical hazards. Always prioritize safety.

• Qualified Personnel: Operations must be accomplished by a licensed technician or Solis authorized person.
• Protective Gear: Always wear technicians’ gloves during the entire process to protect against electrical hazards.
• Electrical Standards: All electrical installations must comply with local and national electrical safety standards.
• Disconnection: Touching inner live parts or removing the inverter cover is a task for qualified technicians only. There are no user-serviceable parts inside, and unauthorized actions will void the warranty. Before any such work, disconnect the inverter from the utility grid and the PV input, and wait at least 5 minutes for capacitors to discharge.
• External Battery Switch: If your battery does not have a built-in DC breaker, an external battery switch must be installed between the battery and inverter for safe maintenance.
• Battery Compatibility: The inverter must be installed with compatible battery models. Any defect, damage, or collateral loss due to using a non-compatible battery is not covered by the inverter's warranty or compensation.
• Advanced Settings: The advanced settings menu is for authorized technicians only. Improper access and operation may result in abnormal results and damage to the inverter, and unauthorized access may void the warranty. The password for advanced settings is "0010".

When to call a technician instead

While basic troubleshooting can be performed by the user, certain situations require professional intervention to ensure safety and maintain warranty validity.

• Persistent Errors: If errors like "BatName-FAIL", "CAN Fail", "OV-Vbatt", or "UN-Vbatt" persist after performing the recommended checks.
• Internal Faults: Any indication of internal inverter faults, such as "OV-Vbatt-H/OV-BUS-H" (Battery overvoltage hardware failure), should be addressed by a qualified technician.
• Lead-acid Battery Configuration: Given the complexity and specific requirements, configuring lead-acid battery settings should be done by experienced installers or technicians. Solis explicitly states that lead-acid batteries are not recommended for general customers.
• Warranty Concerns: If you are unsure about battery compatibility or fear that your actions might void the inverter's warranty, contact a Solis authorized service provider. Unauthorized access to advanced settings or using non-compatible batteries can void your warranty.
• Physical Damage: If there is any physical damage to the inverter or battery, or if you suspect a component failure.