LifePo4 Voltage at .5C - .6C Discharge
Our two GC2's (with 100% charge) drop below 12v while under a 100a - 125a load. When they reach 50% (at 100a - 125a), voltage drops into the low 11's while under-load. What kind of under-load volt...
Forum Discussion
BFL13 wrote:
The graph here showing the G27 discharge curves at various amps (scroll down) relates to the OP's question.
https://www.trojanbattery.com/pdf/datasheets/27_Lithium_12.8-110.pdf
( It also shows what FWC was saying about how quickly voltage falls as soon as any size load is applied)
Another thing showing there is how the AH capacity varies around the 110AH rating. I don't understand how the 9a line can end above 110AH, when the 20 hr rate is 5.5 amps. Anything over 5.5 amps should have a lower capacity.
I was asking before about how they can use the 20 hr rate, which ends at 10.5v when the battery is rated to end at 10v. Something is going on with AH and LFP, but I don't know what.
The capacity vs temp graph is a reminder that below 25C, there is less capacity as shown. But SOC percentages are of the actual capacity.
So when saying the 100AH battery has 15AH at 15% SOC means I was wrong except at 25C.
Running the 100a load for 10 minutes is still 16.7AH, but what % of capacity? My 32% SOC marker might not apply at 10C--I have not done the math on that, but anybody who might use such a marker should.
Also that 100a load is a higher C rate discharge when temps are lower, so it would be like one of the lower amp lines in the G27 graph.
Perhaps you missed the below link that provides a far deeper understanding, else it’s become apparent that your multi-thread confusion tends to grow Legs....
https://www.youtube.com/watch?v=rOwcxFErcvQ
3 tons .....to those yet to be initiated, ‘Caution, Discernment Required, Now Entering the Rabbit-Hole Zone’
