Generac — Battery Inspection and Service
Maintenance · Generator battery
From a Generac owner's manual covering: 9735, Q-55LP, Q-70LP. Check it applies to your exact model before use.
Applies to: Generac 9735, Generac Q-55LP, Generac GN-480 engine, Generac GN-570 engine
Before you start
- Storage batteries give off explosive hydrogen gas
- Battery electrolyte is caustic sulfuric acid
Procedure
- Once weekly inspect battery posts and cables for tightness and corrosion.
- Clean and/or tighten as necessary.
- Check battery fluid level and fill with distilled water only.
- Every six months have state of charge and condition checked with an automotive hydrometer.
Tools required
- Automotive type battery hydrometer Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Distilled water only
- Hydrometer check every six months
Full service-parts list: Generac 9735 →, Generac Q-55LP →
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.