![]() I don't know enough about these to know if there would be any isolation issues, though.Ī third option is to use a marine solution, rather than a RV solution. I'm pretty sure that this would solve the isolation problem, but it seems inefficient.Īn other option is to use a 12v DC to 12vDC charger, like the Tecmate Optimate TM-500. ![]() ![]() You'd have to run it from an inverter, though. One thing I can think of to be perfectly safe and not stress the system is to charge the second battery only with a limited amperage battery charger, like the 1.5 Amp BatteryMINDer 1510. I will put a low voltage disconnect on the camping battery and have thought about building a buck boost 12v input charger but it would need to be pretty beefy for 15A and would add another bit of complexity I'm not sure I need.Ĭould anyone validate that I'm on the right path? I'm worried pulling too hard on the aux battery and potentially charging the camping battery too hard since the wire gauge would be the primary charge limiting factor. My thinking at this point is to add a relay isolator in the void above the aux battery and install a bulkhead cigarette socket to plug the camping battery into. ![]() I estimate a 50-85Ah demand that I would like to recharge in 5-6 hours driving so I was thinking that I would need to charge at about 15A to make that work. I understand that I have nearly unlimited power while the car is in READY but then it's unlocked and occasionally running the ICE and confusing the other campers. I'm looking to add an occasional 12v AGM to provide camping power while the car is off. Sorry if this ground has been covered before. ![]()
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