What it means
Battery Over Voltage protection — Listed under 7.1 Battery System Features 'Battery Protection': protects against over-voltage at the battery side (max charge voltage 57.6 V per spec).
Cause: Battery voltage rose above the over-voltage protection value — the charger or inverter is applying more than the pack's 57.6 V maximum charge voltage, or failed to taper off at the end of charge.
How to fix it
- Power down the inverter, wait 5 minutes for capacitors to discharge, then restart.
- If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.
Source: felicity-5.1-kwh-user-manual.pdf, p.4