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.
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.
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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)
Note: Documented identically for both the Orion XS and Orion-Tr Smart families.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.