Solar · Error codes · SMA Solar Technology AG
6512SMA Solar Technology AG · Sunny Boy (SB 1.5-6.0)
6512 on a SMA Solar Technology AG Sunny Boy: The inverter will only recommence grid feed-in once the temperature has reached at least −25°C
Short answer
On a SMA Solar Technology AG inverter, 6512 means: The inverter will only recommence grid feed-in once the temperature has reached at least −25°C. The inverter stops until the fault clears or is reset.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: The inverter will only recommence grid feed-in once the temperature has reached at least −25°C.
Part involved: low ambient temperature.
When it shows: The inverter will only recommence grid feed-in once the temperature has reached at least −25°C.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Severity | Information only |
| Engineer needed? | No |
The inverter stops until the fault clears or is reset.
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.
- Feed-in resumes automatically once the inverter warms above -25 °C.
What the engineer will check
- None unless it persists at normal temperatures.
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 98 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026