8003 on a SMA Solar Technology AG Sunny Boy: The inverter has reduced its power output for more than 10 minutes due to excessive temperature
Short answer
On a SMA Solar Technology AG inverter, 8003 means: The inverter has reduced its power output for more than 10 minutes due to excessive temperature. The inverter keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: The inverter has reduced its power output for more than 10 minutes due to excessive temperature.
Part involved: power derating.
When it shows: The inverter has reduced its power output for more than 10 minutes due to excessive temperature.
Likely causes:
- SMA corrective measures: Clean the cooling fins on the rear of the enclosure and the air ducts on the top using a soft brush. Ensure that the inverter has sufficient ventilation. Ensure the maximum ambient temperature is not exceeded. Ensure that the inverter is not exposed to direct solar irradiation. =====PAGE 102=====.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Warning |
| Engineer needed? | Yes |
The inverter keeps running with some functions stopped.
Resetting itself: yes.
Manual reset: Automatic when condition clears.
What you can check
- Read the event number and message in the SMA Energy app / Sunny Portal (ennexOS) or the inverter's web interface and note the date/time for your installer. A red LED on the inverter means an event has occurred.
- Check nothing is stacked against, covering or boxing in the inverter and that it is not in direct sun in an enclosed space; keep the area around it clear.
What the engineer will check
- Clean cooling fins/air ducts, confirm ventilation clearances and ambient temperature limits.
Who to ask for: PV installer.
Certification: Qualified electrician (BS 7671; MCS-certified PV installer for work on the PV array/DC side).
What you might notice
Sources
- Operating manual SUNNY BOY 3.0/3.6/4.0/5.0/6.0 ↗ · SBxx-1AV-41-BE-en-21 Version 2.1 · page 101 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026