Furrion MPPT / Renogy error code Solid red
Fault - typically wiring (reversed polarity), battery isolated, or short on output
What to check, and in what order, is in the app. The flow Solar installed but battery not charging walks this code step by step with the pass/fail measurements, wiring schematics and procedures that go with it, and it works offline in the bay.
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- Furrion MPPT Solar Charge Controller Instruction Manual IM-FEN00012 (FSCC30/FSCC60, 25A/50A wall-mount) - Charge and fault indicator LED, p.12Furrion / Lippert