What Huawei and FoxESS alarm and error codes mean, based on the manufacturers' manuals.
Troubleshooting
FoxESS error codes fall into four groups: the grid (for example Grid Lost Fault), the solar panels (for example Pv Volt Fault and Iso Fault), the battery (for example BMS Lost) and internal faults. Grid faults often clear by themselves when the grid is normal again. Faults that persist or return must be handled by a professional.
5 min · Updated 11 October 2026
Troubleshooting
Huawei SUN2000 alarms fall into four groups: the grid (for example 2032 Grid Failure), the solar panels (for example 2062 Low Insulation Resistance), the battery (2068 Battery Abnormal) and internal faults (2064 Device Fault). Grid alarms that happen occasionally clear by themselves when the grid is normal. Alarms that persist or keep returning need a professional.
5 min · Updated 11 October 2026