Off-grid Inverter FAQs

A: If the EPS (power backup) function is activated, the SNA inverter may display a load reading of less than 60 watts even when no load is connected to the EPS output port.

A: Warning code 00 signifies a “Battery communication fault,” indicating a failure in communication between the battery and the inverter. Additionally, Fault code 00 may suggest a communication issue between control CPUs, prompting a need for a firmware update or system restart. Status code 00 indicates “Standby” mode, indicating the inverter remains in standby due to unmet conditions to switch work modes.

A: In SNA inverters, the fan operates based on specific power thresholds. When charge or discharge power exceeds 300 watts, the left and middle fans activate. Additionally, the right fan engages when PV power exceeds 300 watts or grid import power exceeds 5000VA.

A: The recommended depth of discharge (DOD) depends on system design, including factors like battery capacity and load consumption. For systems with stable grid input aiming for an 80% DOD, adjust “On-grid cutoff SOC or On-grid EOD” to 20%. For systems with unstable or no grid input, set “Off-grid cutoff SOC or discharge cutoff SOC” to 20%, ensuring it’s lower than the “On-grid cutoff SOC” setting.

A: If the battery operates in lithium mode with communication, voltage data originates from the battery’s BMs. However, if voltage readings persist after the battery breaker is turned off, it could indicate the battery was recently active or the inverter operated in charge mode.

A: Various conditions such as overload, short circuit, PV overvoltage, overheat, or fan failure can trigger a fault in the inverter, causing it to shut off its output. Any abnormal conditions detected by the DSP will lead to a shutdown.

A: The displayed current on the monitoring platform reflects data provided by the battery’s BMs. If the BMs accurately report a total current of 200Ah, the monitoring system will display 200Ah. Ensure to consult with the battery supplier for accurate information.

A: Sudden changes in SOC may result from battery SOC calibration issues. Check MaxCellVoltage and MinCellVoltage for imbalanced battery cell voltages.

A: Check the battery status on the home page. If it shows specific codes like 0x10, 0x11, 0x12, 0x13, 0x20, 0x21, 0x22, or 0x23, it indicates the battery has requested forced charging.

A: This could occur due to an instantaneous power outage and recovery. After recovery, manually restart the inverter to clear the fault, or check if the charging power of the inverter exceeds 300W.

A: If the battery operates in lithium mode, voltage data originates from the battery BMS and is unrelated to the inverter. In lead acid mode, SOC reading accuracy may vary, suggesting voltage control as an alternative approach.