9034 on a SMA Solar Technology AG Sunny Boy Smart Energy: This message can have the following causes: • The rapid shutdown function was not correctly configured. • The PV module could not be correctly disconnected. Voltage can be applied to the DC inputs of the inverter. • The standby voltage of all PV module switches of a string is > 30 V. • With DC lines laid in parallel, another inverter in the system has caused the Sunspec signal to be overwritten
Short answer
On a SMA Solar Technology AG inverter, 9034 means: This message can have the following causes: • The rapid shutdown function was not correctly configured. • The PV module could not be correctly disconnected. Voltage can be applied to the DC inputs of the inverter. • The standby voltage of all PV module switches of a string is > 30 V. • With DC lines laid in parallel, another inverter in the system has caused the Sunspec signal to be overwritten. The inverter stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 24 September 2026 · 1 source
What it means
The manual says: This message can have the following causes: • The rapid shutdown function was not correctly configured. • The PV module could not be correctly disconnected. Voltage can be applied to the DC inputs of the inverter. • The standby voltage of all PV module switches of a string is > 30 V. • With DC lines laid in parallel, another inverter in the system has caused the Sunspec signal to be overwritten.
Part involved: rapid shutdown / module-level switches.
When it shows: This message can have the following causes: • The rapid shutdown function was not correctly configured. • The PV module could not be correctly disconnected. Voltage can be applied to the DC inputs of the inverter. • The standby voltage of all PV module switches of a string is > 30 V. • With DC lines.
Likely causes:
- SMA corrective measures: Check the settings of the rapid shutdown function and ensure that the operating mode selected is selected according to the DC disconnection unit used. Check the functionality of the PV module switches. Check the standby voltage of the PV module switches used and ensure that the standby voltage of all PV module switches of a string < 30 V.
Is it safe?
| Does the inverter stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The inverter stops until the fault clears or is reset.
Resetting itself: unknown.
Manual reset: See engineer checks.
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.
- Contact your installer.
What the engineer will check
- Check rapid-shutdown operating mode, function and standby voltage of SunSpec PV module switches; contact SMA Service for 9038.
Who to ask for: MCS 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 SMART ENERGY 3.6/4.0/5.0/6.0/8.0/9.9 ↗ · SBSExx-50-BE-en-12 Version 1.2 · page 99 · Reviewed 24 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 24 September 2026