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Old 12-04-2018, 11:22 PM   #11
kidganic
 
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Default Re: Aux battery isolator

How are you switching between shore power and solar power? Do you connect everything to a charge controller and let it switch between the sources? I eventually want to do solar but I since I'm driving most of the time I want to charge the house battery from the alternator.
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Old 12-04-2018, 11:37 PM   #12
autostaretx
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Default Re: Aux battery isolator

I have 12v sockets on each system, and simply move the cooler's 12v plug between the 3 choices.
(the cooler's original 120vac-5vdc is used to "shore power the cooler")
I have the solar and shore 12v sockets "extension corded" to my driver's armrest hinge, so it's easy to move the plug between those two systems even if we forget before starting to drive (my wife can do the swap). Likewise the plug can be moved to the dashboard's 12v outlet (where we have a triple socket-expander)

Elegant? Pretty cabinetry? Nope ... but cheap, flexible and functional.

--dick
p.s. my solar "system" ... the extension cord to the 12v "armrest" socket plugs into one of the two 12v sockets shown. The inverter is bolted (nylon nuts and bolts) to the top of the battery box.
Not shown is the 120 vac plug strip that's normally lying on the floor on that small piece of plywood.



basic solar on a dinky budget: https://sprinter-source.com/forum/sh...475#post682475
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Last edited by autostaretx; 12-04-2018 at 11:44 PM.
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kidganic (12-05-2018)
Old 12-04-2018, 11:37 PM   #13
GSWatson
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Default Re: Aux battery isolator

You could look at something like the Kisae DC-DC charger Or CTEK Dual, both of which charge from both alternator and solar, and switch between automatically. And since they are proper 3 stage chargers, your battery will last longer.


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Old 12-05-2018, 11:30 PM   #14
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Default Re: Aux battery isolator

This is great, I think it's exactly what I'm looking for. Thx!
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aux battery, battery backup, solenoid

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