Battery Charger - Pump - 20A circuit

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Old 09-30-19, 03:20 PM
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Battery Charger - Pump - 20A circuit

2 questions:

I have a 10A battery charger for 12V DC battery on the same circuit as a 1/2 hp sump pump. I cant find the rating on the charger. Generally whats the total amperage here, can they share a circuit?

Battery charger gets quite warm when charging... are battery chargers supposed to get warm?

 
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Old 09-30-19, 03:26 PM
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If the battery charger was 100% efficient it would be 12v x 10A = 120watts / 120v = 1A
I'd figure on 2A max. for the battery charger.

The transformer heats some and there is a diode or rectifier mounted to the case
to convert AC to DC and that runs warm. Perfectly normal.
 
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Old 09-30-19, 03:30 PM
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Thanks Pete
I did find the specs of charger... says input is 3.0A ... the output being 10A threw me off.
 
 

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