SMA inverter derating with event 6502 overtemperature. What do I do?

Plain explanation

From the SMA manual for the Sunny Boy: Clean cooling fins with soft brush. Ventilation. The rest of the checklist is below; work through it in order. Owners can do the app and visual checks; any work on the wiring is for the installer.

Steps from the source

1. Clean cooling fins with soft brush
2. Ventilation
3. Ambient ≤40 °C
4. No direct sun

Source

Where installers ask this

• Am I seeing temperature derating? (r/solar)
• reddit.com/r/solar/comments/u7t8kg/

General guidance based on the manufacturer's manual or the named source. Always follow the current manual for your exact model and your national code. DC and AC electrical work is for qualified installers only. Not affiliated with or endorsed by any brand named; trademarks belong to their owners.