Why does my inverter read E10?
E10 High battery voltage (> 15.5 V) AC shore power
Symptoms: E-10 displayed on screen - Alarm may sound
The unit will stop charging, but the error code will still show on the display screen and the alarm will remain on, and AC power will continue to pass through to the AC outlets- Check for external charging sources, such as an over voltage alternator, and disconnect if necessary.
If external sources are not the cause of the error, then its an internal fault and a replacement inverter is needed. The inverter cannot be repaired.