Where and when should be included. Truth or Consequences is a heck of a lot different than Albuquerque, and inverse in the opposite solstice. I tolerate 95F moderate humidity with a fan. Many others would melt.
Some rigs look like Times Square after sundown, and many have VCR's and large panel televisions going damned near all day and night. I average 2.1 kWh daily using a 14 CF Freon refrigerator freezer. What does this all say? Beats the hell out of me. Others should not assume their lifestyle will be similar to anyone else.
What works perfectly for me will fail utterly for a majority of other folks. 4.5 kWh divided by 12 = 375 usable ampere hours. 415 watts of solar theoretically 100% efficient yields 35 amperes for an average of what (?) 6 hours daily? 35 X 6 = 210 ampere hours X12 = 2,510 VA daily. of course these calculations are all based on theoretically impossible efficiency calculations.
I met a cruiser who happily sailed the Pacific in a tiny sloop using a single group 27 battery. Long before the days of LED lighting. A Delco 7127 63 ampere 10SI alternator.
Dozens of factors have to be appreciated, factored, calculated, deduced and decided upon before an intelligent battery choice can be arrived at. Especially a choice that involves thousands of dollars.
