Battery not charging or not reaching full charge

Sourced from the official MuscleGrid manuals · updated 2026-09-14

If the battery is not charging:

  1. Confirm mains/grid input is present and within range (about 180-260V).
  2. Check that the correct battery type is selected in inverter settings (Lithium/LiFePO4 for MuscleGrid batteries).
  3. Check charging current setting is not set too low.
  4. On solar, ensure panels are getting sunlight and PV is connected. If mains is fine but it still won't charge, the charger section may need service.

Related guides

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Inverter fault codes→
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JK BMS codes on the battery LCD
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