Generac — Battery Maintenance
Maintenance
From a Generac owner's manual — check it applies to your exact model before use.
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Before you start
- Disconnect negative battery cable first
- Do not use tap water for battery
- Remove jewelry and use insulated tools
Procedure
- Lift the lid and press the OFF button to shut down the generator.
- Remove the front panel.
- Remove the 7.5 amp fuse from the control panel.
- Remove the intake side panel.
- Disconnect the white battery charger cable.
- Inspect the battery posts and cables for tightness and corrosion.
- Tighten and clean as necessary.
- For unsealed batteries only: Disconnect the battery completely.
- Check the battery fluid level and fill with distilled water only if necessary.
- Have an IASD or qualified service technician check the state of charge and condition.
- Reconnect the battery cables and battery charger cable.
- Reinstall the intake side panel.
- Reinstall the 7.5 amp fuse.
- Place the controller in AUTO mode.
- Complete the Installation Wizard Menu.
Tools required
- Wrench for battery terminals Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Battery: 12V, Group 26R-540CCA or Group 35AGM-650CCA
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.