Xantrex Inverter / Charger: “E02”
warning RV inverter fault codes
What it means
High battery voltage shutdown. The DC input voltage has risen above about 18.0 volts, so the inverter shuts down to protect itself from over-voltage damage. The display alternates E02 with the battery voltage and the status LED turns red.
Most likely causes
- An external charging source (alternator or solar/PV controller) is overcharging the battery most likely
- Faulty or out-of-regulation alternator or charge controller common
- Wrong battery system voltage connected to a 12V unit less common
Safe checks you can do yourself
- Check for active charging sources such as a PV charge controller or vehicle alternator and disconnect if needed
- Verify the unit is connected to a 12V battery system
- Have the regulation of any external charging system checked
How to reset / clear E02
- Remove or correct the over-voltage charging source
- Allow battery voltage to fall back into range; the unit clears the fault once voltage is normal
- Use the front-panel power button to clear an active alarm if needed
When to call a technician
If no external charging source is present yet E02 persists, or if an alternator/charge controller is overcharging and cannot be corrected, contact a qualified technician.
Applies to
Freedom XC PRO 2000 · Freedom XC PRO 3000
FAQ
What does Xantrex Inverter / Charger code "E02" mean?
High battery voltage shutdown. The DC input voltage has risen above about 18.0 volts, so the inverter shuts down to protect itself from over-voltage damage. The display alternates E02 with the battery voltage and the status LED turns red.
How do I reset Xantrex Inverter / Charger E02?
Remove or correct the over-voltage charging source Allow battery voltage to fall back into range; the unit clears the fault once voltage is normal Use the front-panel power button to clear an active alarm if needed
What is the most common cause of E02 on a Xantrex Inverter / Charger?
The most likely cause is an external charging source (alternator or solar/pv controller) is overcharging the battery.
Related · Xantrex inverter / charger
The battery voltage has fallen low enough that the inverter … E03
AC output overload shutdown. The connected AC load exceeded … E04
Over-temperature shutdown. The inverter's internal temperatu… E10–E19
Internal hardware error. The inverter/charger detected an in…
Sources
- Freedom XC PRO Inverter/Charger Owner's Guide — Table 13 Error codes; High Voltage Shutdown >18.0V, PN 975-0799-01-01 Rev D (Xantrex)
Note: 18.0V threshold and behavior documented for the 12V Freedom XC PRO.
● Last verified 2026-06-29 · compiled from manufacturer documentation. Codes can vary by model year — always cross-check your unit’s manual.