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
"With a battery the first half of the Ah drawn from the battery are at a higher voltage than the second half, so yes at 50% Ah you have used more than 50% of the energy in the battery."
The total AH is 100% of the capacity between full and empty
The total energy is 100% of the capacity between full and empty
When you use up half the "capacity" it doesn't matter what you are measuring, AH or energy, you are at half the capacity, 50% with 50% remaining of whatever units you want to use for "capacity"
2 + 2 = 4 where 4 is the total capacity
3 + 1 = 4 where 4 is the total capacity
2 is half way to 4, 3 is not half way to 4.
So they have two different kinds of "capacity" and they are not speaking English. Meanwhile, they are trying to make their monitor read "half way down" when they have half the energy left,
BUT they want that to be half the AH too where they rate the battery in AH. They have two sets of books! :)
EDIT--They talk about a "reserve capacity". Perhaps that is from making 50% of the energy pretend that is 50% of the "pretend AH", which is less than half the "real AH" when you get to "empty" on energy , you still have some "real AH" left to go? (but no energy) Makes no sense.
So are they using real AH at the 20 hr rate, or "pretend AH" ?
If I run a 5 amp load on a 100AH FLA it takes 20 hrs to be "empty"
If I run a 5 amp load on a "100AH" LFP how long will it take to be "empty"?
The total AH is 100% of the capacity between full and empty
The total energy is 100% of the capacity between full and empty
When you use up half the "capacity" it doesn't matter what you are measuring, AH or energy, you are at half the capacity, 50% with 50% remaining of whatever units you want to use for "capacity"
2 + 2 = 4 where 4 is the total capacity
3 + 1 = 4 where 4 is the total capacity
2 is half way to 4, 3 is not half way to 4.
So they have two different kinds of "capacity" and they are not speaking English. Meanwhile, they are trying to make their monitor read "half way down" when they have half the energy left,
BUT they want that to be half the AH too where they rate the battery in AH. They have two sets of books! :)
EDIT--They talk about a "reserve capacity". Perhaps that is from making 50% of the energy pretend that is 50% of the "pretend AH", which is less than half the "real AH" when you get to "empty" on energy , you still have some "real AH" left to go? (but no energy) Makes no sense.
So are they using real AH at the 20 hr rate, or "pretend AH" ?
If I run a 5 amp load on a 100AH FLA it takes 20 hrs to be "empty"
If I run a 5 amp load on a "100AH" LFP how long will it take to be "empty"?
