What does Growatt error 302 mean?
302 means the on-grid inverter cannot see grid power. During load-shedding this is normal: for safety, an on-grid inverter does not supply power without the grid. The code should clear when power returns.
Why does code 302 appear?
- Load-shedding or a power cut.
- The inverter's AC breaker is off or has tripped.
- An AC wire is loose or cut.
What can you safely check for 302?
- Check that the house has grid power.
- Switch the inverter's AC breaker back on if it has tripped.
- After power returns, wait a few minutes.
Safety: never reach into an electrical panel, board, gas pipe or the inside of an inverter yourself. You can get a shock or release gas. This is a mistri's job.
When should you call a mistri?
If grid power is there and the breaker is on but 302 stays, or the breaker keeps tripping, call a solar mistri. An inverter carries DC current from the panels and battery that can kill, even after the mains is off. Never open the inverter cover or the DC wires yourself.