dual battery w/isolator and solar charging

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496bb

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CL
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1987
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Suburban R20
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454
So, looking to put in two fresh batteries and make a dual setup. I have a diode isolator. But, I see these Cyrix isolators, and I'm trying to figure out how I could wire in a simple cheap solar trickle charger to keep both batteries topped off, as this won't be a daily driver. Anyone done this?
 

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