Victron Energy Solar Charge Controller: “Err 2”
warning RV solar charge controller error codes
What it means
Battery voltage too high. The controller stopped charging because the battery voltage rose above its safe limit.
Most likely causes
- Another charge source (alternator, AC charger, second MPPT) pushing the bank high at the same time common
- Battery system voltage set lower in the app than the actual connected battery common
- Internal controller fault rare
Safe checks you can do yourself
- In VictronConnect confirm the configured battery voltage (12/24/36/48 V) matches the actual battery
- Check whether other chargers are charging the same bank simultaneously and coordinate their voltage limits
- Review the configured absorption/float voltages for the battery type
How to reset / clear Err 2
- No manual reset needed: charging resumes automatically once the battery voltage drops back to a safe level
When to call a technician
Voltage settings are correct, no other charger is active, yet Err 2 keeps appearing — the unit may be faulty.
Applies to
SmartSolar MPPT (all) · BlueSolar MPPT (all)
FAQ
What does Victron Energy Solar Charge Controller code "Err 2" mean?
Battery voltage too high. The controller stopped charging because the battery voltage rose above its safe limit.
How do I reset Victron Energy Solar Charge Controller Err 2?
No manual reset needed: charging resumes automatically once the battery voltage drops back to a safe level
What is the most common cause of Err 2 on a Victron Energy Solar Charge Controller?
The most likely cause is another charge source (alternator, ac charger, second mppt) pushing the bank high at the same time.
Related · Victron Energy solar charge controller
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On the SmartSolar MPPT RS / inverting models, Err 43 is an i…
Sources
- MPPT Solar Charger Error Codes — Err 2 — Battery voltage too high (Victron Energy)
Note: Title confirmed on the official Victron page.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.