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otrfun's avatar
otrfun
Explorer II
Jan 11, 2021

60a DC-to-DC Charger Powered by 220a Alternator

Thinking about installing a 60a dc-to-dc charger in our truck camper. Have plans to power it with the 220a alternator in our truck. Under a worst case scenario it could load the alternator with an a...
jkwilson's avatar
jkwilson
Explorer III
Jan 11, 2021
DC-DC converters can put out much higher voltages than their supply voltage.

Be aware that just because your alternator is rated at 220A, it won’t always supply that much. At idle there likely won’t be anywhere near 60A available for the charger even with the vehicle batteries charged.

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