Axpert Warning 04 warning: Low battery
Keep an eye on it
Urgency: low
What it means
The battery is running low. Cut back on loads and let it recharge.
Likely causes
- Long outage
- Heavy loads
What you can safely check
- Let the battery recharge from solar or the grid before using heavy appliances again.
- Switch off or unplug heavy appliances (kettle, heater, geyser, pool pump) on the backup circuits.
When to call a pro
If it doesn't clear on its own, happens often, or comes with burning smells, heat or noise, call a qualified installer.
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.