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.
Accuracy notes
Official title and auto-reset behavior confirmed.
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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Battery voltage too high. The controller stopped charging because the… Err 17
Controller overheated despite reduced output current. The internal… Err 26
Terminal overheated. The power terminals (PV or battery screw terminals)… Err 38
PV input shutdown. The controller short-circuited its own PV input as a… Err 43
On the SmartSolar MPPT RS / inverting models, Err 43 is an inverter…
Sources
- MPPT Solar Charger Error Codes — Err 33 — PV over-voltage (Victron Energy)
● Checked against 1 manufacturer document · Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual. How we verify