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Curtis B.
Curtis B., Technician
Category: Small Engine
Satisfied Customers: 12592
Experience:  have worked on and around most engine models for 35 yrs./Polaris ATV expert
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How do I test the built in battery charger on my 20KW

Customer Question

How do I test the built in battery charger on my 20KW Generac whole house backup generator? The battery just failed at the three year mark
JA: What's the make and model of the generator? And can you guesstimate how old it is?
Customer: Generac Guardian 20k installed in 2013
JA: Do you plan on doing the work yourself?
Customer: If possible
JA: Anything else we should know to help you best?
Customer: I do all the maintenance(oil & fliter change, air filter & plugs ) and just diagnosed a no start due to battery failure. Not afraid but know my limits
Submitted: 4 months ago.
Category: Small Engine
Expert:  JON replied 4 months ago.

Remove the battery leads and test between the + cable to the - battery post