Lithium batteries
Hi all, Quick question. I have asked some of the sellers, but have not gotten a response. My question is can you mix battery amperage 100 amps with a 200 amp battery? Thanks Lee
Forum Discussion
wa8yxm wrote:This is closer to true for lead-acid due to the high internal resistance. LFP will be initially closer to 50/50, but the truth is even if they are identical 200 amp batteries in parallel the current will not be equal due to variations in the cabling resistance etc. Even the slightest minutia of difference creates an imbalance.
Thus the if you put a 100 amp load on the pair the 100 amp battery will not provide 50 amps but 33.33333333 and the 200 amp will provided 66.6666666d The current divided PRECISELY according to the capacity of the batteries.
One will generally discharge faster initially and as the actual voltage slowly differentiates the batteries will be closer to proportional. The battery that provides proportionally less at the start will provide more toward the finish.
Yes one of the batteries will inevitably work harder than the other at less than full cycling. And there are so many more cycles available it could be a decade before it is noticed.
For reference I have 2x 600 ah batteries in parallel and it is very common to initially see 60 amps from one and 70 amps from the other running the microwave.
