Growatt Fault 51 fault: Over-current or surge

What it means

The inverter saw a current surge and tripped. One restart is fine; repeats need an installer.

Likely causes

• Appliance start-up surge
• Grid surge

What you can safely check

1. Restart the inverter once using its documented switch-off and switch-on procedure.
2. If it keeps coming back, stop and call a qualified installer.

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.