Charging Li-Ions batteries
Reading up some on the topic and charging a bank seems to be an issue. Is anyone familiar with this application in the RV world? and or sail boats? A bit of backstory...my S-I-L is planning to buil...
Forum Discussion
vermilye wrote:pianotuna wrote:According to Battleborn the considerations for my lithium batteries are: Don't charge under 32°F, don't draw power from them under -4°F, and there is the possibility of damage to the battery case if there are vibrations when temperatures are under -15°F. The BMS prevents the first two conditions from being exceeded.
DAMHIK that Li can't withstand freezing. Where I live, leaving them disconnected may not work.
Right now my pair of Battleborn lithium batteries are sitting at 82% with the battery disconnect switch open. They have been there since mid November, dropping .2V over that time.
While if I had a full sized RV I probably would have considered SiO2 batteries, in my 21' trailer weight savings is a big consideration. Switching from a pair of 6V lead acid to the pair of 12V lithium almost doubled my capacity & halved the weight. I love being able to still run my microwave with the batteries at 50%...
you messed me up with the american temps. -4F is -20C . who wants to camp when its that cold anyways. and that is the min temp for discharging under use. I found this link on Amazon.ca so the LifePO4 cells are in canada now, although we are getting the usualy rip off on pricing.
280ah cells
now I have to do some serious thinking I need to replace 4 6V batteries in my 5th this spring. if i go LA then I want to increase to 6 batteries at 240/battery for 235 ah would be 1440.00 for about 350ah usable. if I went Sio2 then it would be a bit more weight on the tounge and be 2-3000 for that 350ish usable AH . or for 1899, plus 100.00 for a real good BMS that does auto ballancing and everything, and a bit of DIY making a case out of material I have in the garage I would have 448 usable AH of Li at 1/6th the weight and 1/4 the size of my set up I have now. plus I could move them from the front "generator" compartment and ut them in the basment right beside the inverter and they would be heated there.
tough choice, I know I am knocking SIO2 out right away, there just to expensive and the benifits done warent them over a normal battery yet. if the price would come down to where they are competitve they might be a good option.
Did you have to change your converter for the LI batteries?
Steve
