rollinstone
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Has anyone added a dc to dc house battery charger to their Expy? The existing cable provides very little amperage to the house battery(ies) while towing. I'm curious how you wired it from the Expy's alternator.
DC to DC charger wiring
- Thread starter rollinstone
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JimmyM
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I have a 15A DC-DC charger in my camper. It pulls 18A from the 12V DC charge line on the truck. Works just fine. It's going to depend on how big a DC-DC charger you plan on using. I think the charge line is fused at 30A on my 2011 and 20A on my 2023.
OP
OP
rollinstone
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All I need it to do is keep up with my fridge when it's running off battery while rolling down the road...20A should be plenty. Curious how you ran your wiring from the alternator/start battery. Some have said ya get better amperage by running the wires directly to the charger rather than going through the 7-pin connection. I suppose the wiring is gonna have to go under the chassis somewhere.
JimmyM
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I just used the 7-pin. My DC-DC is only pulling 18A, It's a 14.5V (15A max) DC-DC converter. So the most it'll ever pull is 18A
I use 14.5V to charge my lithium camper batteries. 15A isn't a lot, but usually it's just topping them off as I drive to the camp ground.
I use 14.5V to charge my lithium camper batteries. 15A isn't a lot, but usually it's just topping them off as I drive to the camp ground.
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