Axpert Fault 03 fault: Battery voltage too high
Call a qualified installer
Urgency: high
What it means
The battery is over-charged or its voltage is too high. An installer must check the charge settings and battery.
Likely causes
- Charge settings wrong
- Battery fault
Don't try to fix this yourself
When to call a pro
Call a qualified installer now. Switch off heavy loads and don't try to repair anything yourself.
Solar systems carry dangerous voltages. Only do the safe checks listed. If unsure, call a pro.
Source: Voltronic Power 1.5KW/3KW/5KW Solar Inverter/Charger User Manual v1.8 (Axpert VM III) (paraphrased)
Axpert-type inverters are sold under many names; codes can differ slightly by model.