Checking Battery Charger Amperage and Voltage

[pelletman]

Has anyone ever checked the output of their battery chargers? I have a couple that are rated at 200 to 300 amp output, and they seem to work, but on the highest jumpstart settings I see about 5 amps if I measure with an amp clamp on a multimeter. It does go lower on other settings. My Genus 3500 puts out a bit under 2 amps when measured. Voltage is 14 to 15. Does that seem right?

 

[Aquamoose]

200 to 300 amps?!


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[pelletman]

200 to 300 amps?!


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Yup that is what they say. For jump starts

 

[TonyJ]

Do that same test but while having a fairly dead battery and crank an engine and you will see the amps shoot up. Battery chargers won’t put out high amps unless the connected load is drawing it


Tony

 

[pelletman]

Do that same test but while having a fairly dead battery and crank an engine and you will see the amps shoot up. Battery chargers won’t put out high amps unless the connected load is drawing it


Tony

Ahhh, OK. I suppose I could replicate that with a carbon pile tester.