Lithium batteries and new solar charger

Almot wrote:

StirCrazy wrote:

which brand did you buy? evey raw cell I have looked at say it can handle 1C all day long and maintain the 3000 to 4500 cycles its rated at, the optimal 0.2C and such will get you around 7000 cycles.

Steve
Steve

Lynaclithium.com. Essentially a Chinese battery by Canadian importer. They claim 6000 cycles at 0.2C. I "doubt" that I will live that long, but chemical deterioration due to aging will likely kill it sooner.

ok so not raw cells, but a built package from a company who can put anything on there and most will be geared to protect them and there warenty.

But, ya thats about inline with the rest, 3-4000 cycles at 1C and 6-8000 at a reduced rate.. age wont kill it realy, but it will take away some of the capacity over time so your 100ah battery will be come a 88-85AH battery after the initial cycle life, but from what I have played with the remaining seem to fuction normaly just a reduced capacity.

the thing is when we are taking 1C charging the issue you need to watch for is internal battery heat. if you dont heat that battery up internaly you can charge at that rate for the life of the battery. this is why electric cars have built in battery cooling/heating. for us as RVers we should never encounter this issue because of the way we tend to set up and charge batteries. we build large banks, 200 to 500 AH and the average charger in a rv is 45 to 55 amps. so on a 200ah battery that gives you a 0.25C (aproximatly) and even lower by far on a 500AH system. so that leave the tempature of the batteries when charging the only concern, and because of the low charge rates we wont have to worry about that creating heat, but the actual utside tempatures influence on the batteries. ie, is it -30 out and your battery has been sitting. how are you going to warm it up so you can charg it etc...

Steve