Solar with Lithium Battery

2Noob4U wrote:

BFL13 wrote:
Here is some honest advertising by Relion LFP

"More Usable Capacity 25-50% more capacity than lead-acid equivalent"

The OP wants to camp off grid in a TC for a few days where he runs a few things but not the furnace or bigger inverter loads, so he seems to think one 100AH battery will be enough as long as he has enough solar to keep up. With furnace and the usual things, it takes one battery per day.

He could do his loads with two FLAs and "enough" solar. He is hoping the one LFP will do it, being like 1 and 1/2 batts, which it might with no furnace time.

The money side of things is obvious and up to the OP for what is "worth it" .

EDIT--"enough solar" is the same for either battery bank size. IMO he will need 200w or more and 100w is not enough. On my budget, YMMV, I would get more solar with the money I saved from getting FLA instead of LFP. But I am not the OP!

I do most of my camping in the warm weather months here in Colorado off grid. The furnace has run twice in my Lance 650. I have used a space heater that works more than sufficient in 20 degrees hooked to 30 Amp.

The lead acid battery dies after about 2 days with the 100 watt solar panel. I'm probably not the best steward of making sure the battery amperage and usage stays moderated.

Maybe it's just marketing. I have read that lithium batteries charge faster than lead acid. I also know you can take the lithium batteries down below 50% capacity.

I thought maybe someone was using a 100 watt solar panel and 100 Ah Lithium battery and knew how long/much it would run before needing to run a generator if at all.

you will get motr time out of the LFP, about double and a 100 amp solar will extend that a bit, but if you assume 4 hours of full charging and a bit of fringe you might get 4 days because of the extra amp from the solar. if you could I would look more at getting a bigger solar pannel and the LFP. the price of pannels are cheep now. grab a 325 watt pannel. I have 100 usable ah of lead acid in my camper with a 325 watt pannel and as long as I dont go two days in a row with out sun I can stay out for a long time using the furnace when the temps are right around freezing. two days of no sun and I still have some left but I am getting concerned. if you had two 100AH Lfp batteries and 325 or more watts of solar you would be set up pretty good. for me to do that with deep cycles it would weight 280 lbs and be the size of 4 gc batteries which I cant fit, but one could be had that would weigh about 48lbs and take up the space of one GC battery. realy it doesnt matter what kind of batteries you use if your not running microwaves and such, just shoot for a min of 100 usabe AH and better yet if you can get to 200 usable AH you will be golden with a deicent solar pannel.

Steve