GoodWe Relay Check Failure
Relay Check Failure (error 01) means the GoodWe ran its self-test on the relay that connects it to the grid, and that check did not pass. The relay is the switch that physically links the inverter to your AC supply, so it is tested before every connection. A one-off Relay Check Failure often clears with a restart; a persistent one needs a look.
What usually causes it
- A transient glitch a restart resolves.
- An AC supply or connection condition the self-check did not like.
- A genuine fault in the relay or its circuit on the inverter's board.
How to handle it safely
- Power-cycle the inverter. Switch off the AC isolator, then the DC isolator, wait 5 minutes, restart. A transient Relay Check Failure often clears here.
- Have the AC connection checked. A poor AC connection can contribute. This is an installer task to verify.
- If it keeps returning after a clean restart, the relay or the inverter's board likely needs service. Contact your installer or GoodWe.
When to bring in a professional
The relay is a safety-critical connection to the grid. A persistent Relay Check Failure should be serviced rather than reset over and over; the relay may need replacement.
Related GoodWe codes
Helpful guides
Sources
- GoodWe inverter user manual and error-message list (Relay Check Failure / error 01 = internal relay self-test failed; restart, relay may need replacement).
- GoodWe installer documentation.
⚠️ Safety disclaimer. Solar inverters carry lethal DC and AC voltage even when "off". This guide covers a safe power cycle only. AC connection and relay or board work must be done by a licensed installer or electrician.