Victron Energy Solar Charge Controller: “Err 33”
danger RV solar charge controller error codes
What it means
PV over-voltage. The solar input voltage exceeded the controller's maximum rated PV voltage, so the controller shut down the PV input to protect itself.
Most likely causes
- Too many panels wired in series for the controller's max PV voltage most likely
- Cold weather raising panel open-circuit voltage (Voc) above the limit common
Safe checks you can do yourself
- Compare the array's cold-weather open-circuit voltage to the controller's maximum PV voltage rating
- Recount panels in series versus parallel for your model's voltage limit
- Reconfigure the string (fewer panels in series) if it exceeds the rating, especially in cold climates
How to reset / clear Err 33
- No manual reset needed: the controller auto-resets once the PV voltage drops back below the safe limit
When to call a technician
PV voltage is within rating but Err 33 persists, suggesting a measurement or internal fault.
Applies to
SmartSolar MPPT (all) · BlueSolar MPPT (all)
FAQ
What does Victron Energy Solar Charge Controller code "Err 33" mean?
PV over-voltage. The solar input voltage exceeded the controller's maximum rated PV voltage, so the controller shut down the PV input to protect itself.
How do I reset Victron Energy Solar Charge Controller Err 33?
No manual reset needed: the controller auto-resets once the PV voltage drops back below the safe limit
What is the most common cause of Err 33 on a Victron Energy Solar Charge Controller?
The most likely cause is too many panels wired in series for the controller's max pv voltage.
Related · Victron Energy solar charge controller
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PV input shutdown. The controller short-circuited its own PV… Err 43
On the SmartSolar MPPT RS / inverting models, Err 43 is an i…
Sources
- MPPT Solar Charger Error Codes — Err 33 — PV over-voltage (Victron Energy)
Note: Official title and auto-reset behavior confirmed.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.