Kristof
1977 Airstream Off Grid Trailer
These batteries were constructed with the remainder of an 24v 8S2P battery that I designed and constructed two years ago. After some use on a gentle solar system two of the cells went wonky (low resistance) and really mucked up the capacity of the bank. I removed the bad cells, top balanced (3.65v) the remainder and made these three batteries from the remaining good cells. They have about 17 cycles and were treated very well. They were Orient Power Cells from China that I ordered 3 years ago. I have just received the new cells for my bank and no longer need these ones. (I went to 280AH cells)
100 AH 12v LiFePO4 Battery
4S (4 100AH cells 3.2v each) (gently used)
DALY 4S12v100a J05A-GE03 BMS (new)
Max Discharge: 100amps
Max Charge: 50 amps (rec 30amps)
Discharge Temp Cutoff: -5 cel (-15 fah)
Overcharge Cutoff (cell): 3.75v +/- .05
Overcharge release(cell): 3.55v +/- .05
Balance detect: 3.5v
Balance Discharge: 30ma
Over Discharge Shutdown: 2.2v +/- .05
Over Discharge release: 2.7v +/- .05
Weight of Battery: 22 lbs 4 oz
I am going to keep this posted here as I owe Will and others for advice over the years. If I cannot sell them here I will repost elsewhere.
I am asking$600 $350 USD per battery or $900 for all three plus shipping. Folks here know that is about cost for these units. I would like to see them go to a good home.
As for paralell use there is a lot of discussion on settings etc and on advanced BMS'. These are bare bones and I would not recommend it but it is possible as long as you maintain a strict check on the cell voltage frequently and maintain the paralell bank. The danger is one battery getting a cell issue and shutting down while the other battery holds the load. I would estimate the risk on a two battery bank to be minimal but that risk increases on the number of batterys on different BMS' you have in your bank. They should all start at an identical SoC.
100 AH 12v LiFePO4 Battery
4S (4 100AH cells 3.2v each) (gently used)
DALY 4S12v100a J05A-GE03 BMS (new)
Max Discharge: 100amps
Max Charge: 50 amps (rec 30amps)
Discharge Temp Cutoff: -5 cel (-15 fah)
Overcharge Cutoff (cell): 3.75v +/- .05
Overcharge release(cell): 3.55v +/- .05
Balance detect: 3.5v
Balance Discharge: 30ma
Over Discharge Shutdown: 2.2v +/- .05
Over Discharge release: 2.7v +/- .05
Weight of Battery: 22 lbs 4 oz
I am going to keep this posted here as I owe Will and others for advice over the years. If I cannot sell them here I will repost elsewhere.
I am asking
As for paralell use there is a lot of discussion on settings etc and on advanced BMS'. These are bare bones and I would not recommend it but it is possible as long as you maintain a strict check on the cell voltage frequently and maintain the paralell bank. The danger is one battery getting a cell issue and shutting down while the other battery holds the load. I would estimate the risk on a two battery bank to be minimal but that risk increases on the number of batterys on different BMS' you have in your bank. They should all start at an identical SoC.
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