Needs saying again, if your talking heating water
and even light cooking, it’s not about the batteries.
Yes they can be a limiting factor. But what it’s really about is generating the power to store in the batteries.
So you can go the large bank, and real large Solar array, or you can stay with a modest bank and current
Solar and run a generator to heat water
and do that light cooking and not need a BIG bank to store power, because your not storing it.
Of course maybe a better approach is to heat water with Diesel or Propane and also cook with Propane or Diesel.
So far as these energy budgets, I think they are cute really, but actual measurement trumps calculations.
So borrow or rent a Honda
, but only use it to charge the bank and live for a week and measure the actual amount of power you use, then you’ll know. Solar messes with that method though because during times of Solar output, you’ll use Solar directly and your amp counting meter won’t see the amps, same when the generator is running charging the bank.
So you go off of overnight use, we use 150AH from the time Solar isn’t producing until the time it is. My Kilowatt of Solar will make roughly 300ish AH in an average day, so most days we put back about as much as we take out, pretty much break even.
I have huge refrigeration
7 cu ft of fridge and 7 cu ft of Freezer
and an Engel we use as a deep freeze, so we use a lot of power, but we don’t try to cook or heat any water.
To heat our 11 gl water heater
if memory serves it takes an hour until it cuts itself off, and it draws 1200 Watts I believe, so ignoring Perkeut or any other inefficiencies it would take another 100 AH to heat 11 gls of water.
So cut that in half 6 gls, then say I don’t want HOT water, warm is good enough, but I bet it’s still 30 or so AH, and that’s not chump change. That’s 1/3 of your 300W Solars output and we haven’t heated water in the pot yet.
Procure a generator just to have one in case, if you don’t need it, sell it. They aren’t hard at all to sell, because many find out once they aren’t motoring every other day, that they can’t get by without one or running their motor
for a couple of hours a day.