Replace standby generator starter battery
Why it matters
Lead-acid starter batteries die silently after 3–5 years. Battery failure is the #1 cause of no-start on standby generators during actual power outages. A failed battery at 2 a.m. means no backup power.
Stop forgetting to do this.
Hearth generates a personalized maintenance schedule so you never miss another replace standby generator starter battery.
How to do it
- 1
Locate the battery on the generator (usually mounted on the side of the engine block).
- 2
Check the date code on the battery top or side to determine age (format is month/year).
- 3
If 3+ years old, purchase a replacement 12V battery rated for standby generators (500+ CCA).
- 4
Turn off the generator and let it cool for 5 minutes.
- 5
Disconnect the negative (black) battery cable first, then the positive (red) cable.
- 6
Remove the old battery and install the new battery in its bracket.
- 7
Reconnect the positive (red) cable first, then the negative (black) cable securely.
- 8
Test generator starting by running a manual start test.