Battery Question

adamis wrote:

pianotuna wrote:
adamis,

Starting with the RV at -30 in storage, how do you plan on heating the batteries up? You can't draw much current from them, so you can't run the furnace. It is a fail. You could run a generator, but DAMHIK that may not work too well. Shore power would work running an electric heater.

There is a good solution which doesn't involve Li, which is cheaper unless you wish to "roll your own" Li.

I am curious, is this your personal situation or a realistic hypothetical based on where you live.

Hi adamis,

I live where it gets to -40. I have boondocked at -37c (-34f).

I've had a generator fail to start at -29.

So it is my personal situation, before I was full time (5 years), and now afterwards when I'm back to trips starting with a cold soaked class C.

There are no storage facilities with shore power available in my town.

I believe LI batteries are excellent, but it is best to have an superior battery management system. Many folks are having good results using them.

For my personal situation and for anyone who has to deal with extreme low temperatures SiO2 share many of the attributes of LiFePo4. The difference is weight--where Li are lighter, and cold weather, where SiO2 can be charged and drawn from at -40. SiO2 do not need a a bms. They can be continuous discharged at more than double the rate recommended for Li, which makes SiO2 wonderful for large inverter use.