Wiring and reality check and gadgets for RV

preposterous4

I have 4 unisolar 68 watt panels on the roof of my 1993 ford e-250.

I have a unconnected battery isolator (true power 70 amps)

planning on 10 guage wiring, parallel, 20 amps/12 volt, to a mppt controller

then from controller AND from isolator to 2, 6 volt golf cart batteries


I will likely be using current during the day while sun charging (only12v), and hopefully topping off the batteries every time I drive (from the alternator)


In my small brain i imagine an in-line fuse/switch/dimmer thingy between connections (especially from the isolator)

I am also trying to imagine a convienent lithium ion battery dump thingy... from the batteries to this Li battery hub to power all my 12v car charger plug electronics...



Can a kind solar geek refer me to the proper in-line and dump/hub gadgets? most thoughts are good thoughs please share )

Also, an unrelated question for RV folks, are these 12v thermal heater/fridge units any good?:

http://www.ebay.com/itm/360661165402?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

http://www.ebay.com/itm/261225759564?ssPageName=STRK:MEWAX:VRI&_trksid=p3984.m1438.l2661