What does GoodWe error 13 Over Temperature mean?

Short answer

GoodWe error 13 'Over Temperature' means the inverter has been too hot for too long, usually because of high surrounding temperature, poor airflow or blocked cooling fins. Keep the area around the inverter clear and out of trapped heat. GoodWe suggests switching off for 15 minutes before restarting; ask your installer if it recurs or the siting breaks clearance rules.