Victron Energy Power Converter: “Error 26”
warning RV power converter problems
What it means
Terminal overheated. The power terminals are running too hot, usually from a poor or undersized connection. The charger reduces output to protect itself and clears the error automatically once the terminals cool.
Most likely causes
- Loose terminal bolts not torqued correctly most likely
- Undersized cable or wrong wire/strand type for the current common
- Corroded or oxidised terminal contact common
Safe checks you can do yourself
- With power isolated, check that terminal bolts are tightened to spec.
- Verify cable gauge and strand type are correct for the charger's current.
- Inspect terminals for corrosion or heat discolouration and clean/replace as needed.
How to reset / clear Error 26
- Correct the wiring/connection issue.
- The error auto-resets once the terminals cool down.
When to call a technician
If terminals overheat even with correct cable size, correct torque and clean contacts, have the install and unit inspected.
Accuracy notes
Documented identically for both the Orion XS and Orion-Tr Smart families.
Applies to
Orion XS 12/12-50A DC-DC charger · Orion-Tr Smart DC-DC Charger (Isolated) · Orion-Tr Smart DC-DC Charger (Non-Isolated)
FAQ
What does Victron Energy Power Converter code "Error 26" mean?
Terminal overheated. The power terminals are running too hot, usually from a poor or undersized connection. The charger reduces output to protect itself and clears the error automatically once the terminals cool.
How do I reset Victron Energy Power Converter Error 26?
Correct the wiring/connection issue. The error auto-resets once the terminals cool down.
What is the most common cause of Error 26 on a Victron Energy Power Converter?
The most likely cause is loose terminal bolts not torqued correctly.
Related · Victron Energy power converter
Battery temperature too high. The charger halts charging to protect the… Error 21
Current sensor problem. The measured charge current is out of the… Error 33
Input voltage too high. The DC input voltage feeding the charger has… Error 67
The charger is set to be controlled by a battery BMS but is no longer… Error 119
Settings data lost. The charger cannot read its stored configuration and…
Sources
- Orion XS 12/12-50A DC-DC battery charger - Troubleshooting & Support — Section 5, Error 26 - Terminal overheated (Victron Energy)
- Orion-Tr Smart DC-DC Charger Non-Isolated - Troubleshooting — Troubleshooting, Error 26 - Terminal overheated (Victron Energy)
● Checked against 2 manufacturer documents · 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