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Ryan AlexanderAug 11, 2025
What to do if Offgridtec MPPT Pro Duo system alarms a voltage fault when using a lead-acid battery?
- JJohn ChanAug 12, 2025
If your Offgridtec Controller system alarms a voltage fault, or alarms an over-discharge fault when BATT1 is 12V but set as 24V, or alarms an over-voltage fault when BATT1 is set as 12V and BATT2 is set as 24V, the issue might be incorrect wiring. To resolve this: * Disconnect the system. * Reconnect BATT2 first, then BATT1. * Ensure that you set the system voltage on the controller to match the BATT1 voltage.
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