9203 on a SMA Solar Technology AG Sunny Boy Smart Energy: A short circuit occurred at the socket for manual secure power supply operation
Short answer
On a SMA Solar Technology AG inverter, 9203 means: A short circuit occurred at the socket for manual secure power supply operation. 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: A short circuit occurred at the socket for manual secure power supply operation.
Part involved: secure power supply (SPS) socket.
When it shows: A short circuit occurred at the socket for manual secure power supply operation.
Likely causes:
- SMA corrective measures: Ensure that the socket is correctly wired. Ensure that the load connected to the socket is working correctly. Unplug the load from the socket and switch on secure power supply operation.
Is it safe?
| Does the inverter stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The inverter keeps running with some functions stopped.
Resetting itself: no.
Manual reset: Unplug the load and switch SPS operation on again.
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.
- SMA's corrective measure: unplug the appliance from the secure-power (SPS) socket, check that appliance, then switch secure power supply operation back on.
- If it repeats, contact your installer.
What the engineer will check
- Check SPS socket wiring and connected load.
Who to ask for: Electrician.
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 SMART ENERGY 3.6/4.0/5.0/6.0/8.0/9.9 ↗ · SBSExx-50-BE-en-12 Version 1.2 · page 101 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026