If you have a 100 amp alternater you'll be right with a triple battery set up. What do your panels return each about 6 amps x2 is 12 amps an hour on a good day. you have nothing thats going to use that much power. You could do what you want with one panel. Out of interest add up what the amperage is of your accessories? Approx is ok if you don't know. I only use 80 watt panel and could stay a very long time in one spot , beer and food aside. changed all my camp lighting to LED to get a little extra out of the battery. Our camp is very bright music all day long etc etc. Pain in the butt fitting 2nd altenator.
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