Home standby generator batteries
Home standby generators must have a battery purchased separately. Most standard car batteries purchased from your local auto parts store will be compatible.
Environment
This article applies to Generac home standby generators.
Which battery does my generator need?
For specific battery size information, check the generator's spec sheet or check the Battery Type Section of your generator's product overview on the Online Product Lookup tool. Note that many home standby generator models share the same battery specifications, but you should always consult the official user manual to verify the appropriate battery for your specific model.
Example of a battery information shown on a product page on Generac.com:
- Most air-cooled units (except for the PowerPact) will use a Group 26R 540 CCA (standard lead acid) or 35 AGM 650 CCA (sealed, better for cold temperatures) at a minimum.
- Most air-cooled, besides the PowerPact, can use AGM batteries.
- PowerPact batteries must be Group U1, 12 volts and 300 CCA minimum
- Some generators do NOT support charging for AGM batteries. Consult your user manual.
- Liquid-cooled generator owners should always consult their spec sheets and owner manuals to confirm battery compatibility. See How Do I Find a Copy of My Home Standby Generator Owner's Manual, Spec Sheets, or Installation Manual? for more information.
Where can I purchase a battery?
Most home standby generators can be purchased from an auto parts store. A local authorized dealer can also assist in obtaining a replacement battery: Where Do I Get a Replacement Battery for My Generac Generator?Batteries can also be purchased from Generac's OrderTree site. Parts specific to your generator can be found by entering your Generator's model number.
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