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Generac — Battery Inspection

Maintenance

From a Generac owner's manual covering: GH-426, GT-999, GTH-530. Check it applies to your exact model before use.

Applies to: Generac GH-426 engine, Generac GTH-530 engine, Generac GT-999 engine

Before you start

  • Explosion; do not dispose of batteries in a fire
  • Disconnect negative battery cable first to avoid spark

Procedure

  1. Press OFF to shut down the generator, lift the lid, and remove the front panel.
  2. Remove the 7.5 amp fuse from the control panel.
  3. Remove the intake side panel.
  4. Disconnect the white battery charger cable.
  5. Inspect the battery posts and cables for tightness and corrosion; tighten and clean as necessary.
  6. (Unsealed batteries only) Disconnect the battery completely; check fluid level and fill with distilled water only if necessary.
  7. Reconnect the battery cables, the battery charger cable, reinstall the intake side panel and the 7.5 amp fuse.
  8. Reinstall the front panel and close the generator lid.
  9. Place the controller in AUTO mode.

Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.

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