new non sulphating battery from Soneil

Itinerant1 wrote:

pnichols wrote:
The price you show for the heavy Soneil is getting into lithium range, but of course lithium batteries still have a problem that I can't accept even if I could accept their pricing ... as I understand it lithiums can't, or shouldn't, be recharged in low ambient temperatures. :h

Are talking about outside temps or cell temps? Unless your battery is outside unprotected why worry.

I've seen outside temps as low as 25f with my front unheated compartment (other than my inverter/ charger & solar controller throwing a little heat) at 40f +/- and cell temps 45-50f. Using the batteries will warm the cells. Now if temps were dropping into the single digits for an extended time a warming pad or just covering the batteries helps hold them warmer. Just my observations from living off of solar/ lfp 24/7/365 for the past 3 years. Besides longterm psoc won't hurt them. ;)

I'm talking about the temperature of the air surrounding the lithium batteries when they are being charged ... from only what I've read in the forums. Lithium battery supplier websites usually make no mention of this subtle concern - maybe it's of no concern for average RV environments. I believe lead acid technology batteries can be charged in single digit temperatures if the charging voltage is merely increased accordingly.

Another thing that concerns me is lithium battery construction - a whole bunch of little cells making up a large capacity 12V battery - with all of those interconnections that could be prone to failure in the rough environment of an RV traveling on-road, or especially on off-highway washboard roads. When are lithium batteries going to contain just a few large cells with far, far fewer interconnections between them to fail - just like as in lead acid batteries?

Click this link to see the internal construction of a typical drop-in lithium battery for RV use -> these pictures of what's inside are a definite concern to me from a potential-for-failure viewpoint:
https://www.lithiumion-batteries.com/uploads/files/15019/12V%20100AH%20Internal%20Design%20PDF.pdf