Lithium batteries and new solar charger

BFL13 wrote:
https://1t1pye1e13di20waq11old70-wpengine.netdna-ssl.com/wp-content/uploads/2019/01/BB10012-2021-Spec-Sheet.pdf

12.5v resting is 14% on this table for a 120 rated at 100 (we are told for a BB?). That is in the knee and voltage will drop very fast if you keep the load on.

So to be clear--are you saying if you got 90AH out so you are at 10% as rated which would be 12.1v if using that graph but voltage is above 12.5 which means it is a 120 and that 10v for zero capacity means it is really at 16.7% (20/120) ?

doesnt mean a 120 spicificly, you try be to factualy some time, it just means that they are using cells that make a larger capacity than the rated capacity so the advertised capacity is the usable capacity. in todays litigation world people would probably sue if they bought a 100ah battery and could only get 85 out of it.

ya I guess that is a good anology. if you find out that it is a true 100 ah battery then just use 85% of the range so set your bottom end at 15% and your top end at 100% you'll increase the life ore than the 3000ish cycles and probably get closer to 5000. if it is still above that 12.8ish volts when you have used 90AH then they have put a larger pack in and fell free to use 100ah on a cycle with a longer cycle life.

for the extra 60 bucks it costs for the increased capacity the companies are being smart warenty wise building in extra capacity and not using it all.

Steve