Restarting your SMA inverter can resolve communication issues, WiFi disconnections, or minor fault codes. Always follow the correct shutdown and start-up sequence for safety and to avoid system damage.
Before you start
- Perform the restart during daylight hours so the inverter receives solar input.
- Check that there are no visible faults, loose connections, or damaged isolators.
- If your inverter has a battery connection (for example, in hybrid setups), make sure the battery system is idle and not in backup mode.
- Never restart during a lightning storm or when system components appear damaged.
Sunny Series
There are two options to perform an inverter restart:
- Restart over night or
- Restart by disconnecting the inverter from voltage sources
1. Restart over night
A restart of the inverter can be performed by switching off the fuse of the inverter (or the circuit breaker of the inverter) overnight and switching it on again the next morning.
This means that the inverter is disconnected on the DC side (because no PV is generated at night) as well as from the AC overnight, and the required waiting time to discharge the capacitors is complied with.
The fuse of the inverter is not located in the inverter itself, but in the AC sub-distribution.
2. Restart by disconnecting the inverter from voltage sources.
For this option please contact your installer.
