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Sofar Solar inverter ID fault codes (the ID01–ID107 range) decoded, with documented causes, fixes and a note on model-specific numbering.
Sofar Solar inverters report faults as numbered ID codes (e.g. ID01 GridOVP) shown on the display or in the monitoring app, rather than free-text errors. The ME3000SP/HYD storage family shares a common fault-code scheme covering grid, battery, PV, hardware-protection, thermal, communication and software faults. Numbering can shift between model generations (for example, GridOVP is ID01 on the ME3000SP but ID06 on some HYD 3K–6K-ES units), so always confirm against the manual for your exact model. Many "Hw…/unrecover…" codes are internal hardware-protection trips: the standard first step is to switch off the DC isolator and AC breaker, wait ~5 minutes, then restart, and contact Sofar support if the fault persists.
46 of 46 codes
The grid (mains) voltage measured by the inverter is too high — above the safe range the inverter is set to operate within.
What to do
If it happens occasionally the grid is briefly abnormal and the inverter reconnects automatically. If frequent, check that grid voltage is within the acceptable range and that AC wiring/breaker is sound; if readings are normal, contact Sofar support (protection thresholds may need adjustment with grid-operator approval).
The grid (mains) voltage measured by the inverter is too low.
What to do
Verify all AC isolators, MCBs and RCDs are switched on. Occasional events self-clear when the grid recovers; if persistent with mains present elsewhere, contact an engineer.
The grid (mains) frequency measured by the inverter is too high.
What to do
Occasional events self-clear when the grid normalises. If frequent, check grid frequency is within range and AC wiring; contact Sofar support if readings are normal.
The grid (mains) frequency measured by the inverter is too low.
What to do
Occasional events self-clear when the grid normalises. If frequent, verify AC safety devices are on and contact an engineer if it persists.
The inverter is measuring too high a voltage from the battery (battery overvoltage).
What to do
Verify battery overvoltage settings match the battery manufacturer's specifications; book a repair engineer to test the DC/battery components if it persists.
LLC bus voltage is too high and has triggered hardware protection — an internal inverter fault.
What to do
Turn off the DC isolator and AC breaker for ~5 minutes, then restart. Contact Sofar support if it persists.
Boost voltage is too high and has triggered hardware protection — an internal inverter fault.
What to do
Power cycle (DC isolator and AC breaker off ~5 minutes) then restart; contact Sofar technical support if unresolved.
Buck-Boost current is too high and has triggered hardware protection — an internal inverter fault.
What to do
Power cycle (~5 minutes) then restart; contact Sofar technical support if it persists.
The battery current is too high and has triggered hardware protection.
What to do
Power cycle (~5 minutes) then restart; contact Sofar support if it persists.
The grid (AC) current is too high and has triggered hardware protection.
What to do
Power cycle (~5 minutes) then restart; contact Sofar support if it persists.
Internal A/D sampling fault on the grid current channel.
What to do
Shut down and restart; contact Sofar support if the fault persists.
Internal A/D sampling fault on the grid voltage channel.
What to do
Shut down and restart; contact Sofar support if the fault persists.
The inverter is measuring too much current from the batteries (battery overcurrent).
What to do
Book a repair engineer to test the DC/battery system; power cycle if instructed.
Software-detected instantaneous AC overcurrent — the grid current is too high.
What to do
Switch off, wait ~5 minutes and restart; contact Sofar support if it persists.
Buck circuit current is too high.
What to do
Switch off, wait ~5 minutes and restart; check input current levels and contact support if unresolved.
The AC output current (RMS) is too high.
What to do
Investigate the cause of excessive output current; power cycle and contact support if it persists.
Grid-voltage consistency fault — the two independent voltage measurements disagree.
What to do
Shut down and restart; contact Sofar support if the fault persists.
Grid-frequency consistency fault — the two independent frequency measurements disagree.
What to do
Shut down and restart; contact Sofar support if the fault persists.
SPI internal communication lost between control boards.
What to do
Shut down and restart; contact Sofar support if it persists.
SCI communication fault between the control and communication boards.
What to do
Switch off, wait ~5 minutes and restart; contact Sofar support if it persists.
Battery temperature is too high.
What to do
Reduce charge/discharge current and ensure adequate ventilation around the battery; contact support if it persists.
The inverter heatsink temperature is too high (inverter overheating).
What to do
Reduce current settings and ensure good ventilation/airflow around the inverter; contact support if it persists.
The ambient/environmental temperature around the inverter is too high.
What to do
Reduce current settings and improve ventilation/cooling of the installation location; contact support if it persists.
Bus voltage is too high and has caused an unrecoverable fault.
What to do
Power cycle (off ~5 minutes) then restart; contact Sofar support if it persists.
Unrecoverable battery overcurrent fault while operating in EPS (backup) mode.
What to do
Contact Sofar technical support.
Unrecoverable EEPROM write fault — internal memory error.
What to do
Shut down and restart; contact Sofar support if it persists.
Unrecoverable EEPROM read fault — internal memory error.
What to do
Shut down and restart; contact Sofar support if it persists.
The ambient temperature around the inverter is too hot.
What to do
Ensure adequate ventilation and airflow; contact support if it persists.
The grid (mains) frequency measured by the inverter is too high.
What to do
No manual action needed — the inverter will reconnect when grid frequency returns to range; monitor the grid.
The inverter has received a remote command to decrease its power output.
What to do
No action required — this is a remote/grid-operator command; normal operation resumes when the command clears.
The inverter has received a remote command to turn off.
What to do
No action required — operation resumes when the remote command is lifted.
The inverter has stopped discharging because the user-set depth-of-discharge (DOD) limit has been reached or the battery voltage is too low.
What to do
Normal protective behaviour; adjust discharge/DOD settings if desired or allow the battery to recharge.
The inverter has shut down to protect the batteries because the battery voltage is too low.
What to do
Allow the batteries to recharge; check the battery/charging system if it recurs.
The firmware/software versions on the inverter's boards are not consistent and require updating.
What to do
Upgrade the firmware to the current version; contact Sofar for update assistance.
The communication board EEPROM is faulty.
What to do
Switch off, wait ~5 minutes and restart; contact Sofar support if it persists.
Real-time clock (RTC) fault on the inverter.
What to do
Shut down and restart; contact Sofar support if it persists.
The inverter's country code / grid-protection settings are invalid or need to be reset.
What to do
Have the country/grid code reset to the correct value; contact Sofar or your installer.
SD card fault — the card needs replacement.
What to do
Arrange replacement of the SD card; contact Sofar/installer.
Battery overcurrent fault during discharge.
What to do
Shut down and restart; contact Sofar support if it persists.
Battery overcurrent fault during charging.
What to do
Shut down and restart; contact Sofar support if it persists.
Battery overvoltage fault.
What to do
Shut down and restart; check battery settings and contact support if it persists.
Battery undervoltage fault.
What to do
Allow the battery to recharge; check the battery/charging system; contact support if it persists.
Battery high-temperature protection while discharging.
What to do
Improve ventilation and reduce discharge current; contact support if it persists.
Battery high-temperature protection while charging.
What to do
Improve ventilation and reduce charge current; contact support if it persists.
Battery low-temperature protection while discharging.
What to do
Allow the battery environment to warm; review operating conditions and restart if it persists.
Battery low-temperature protection while charging.
What to do
Allow the battery environment to warm; review operating conditions and restart if it persists.
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