Solar4me22
New Member
- Joined
- May 1, 2022
- Messages
- 8
Greetings- I purchased 16 280Ah LiFePO4 batteries from a vendor on AliExpress last March and a week ago started preparing them for a 48v solar system. The initial voltage of the batteries measured 3.16v for each cell. After watching Will Prowse's YouTube video on how to top balance new batteries I purchased a 30v 10a power supply from Walmart.com and started charging all 16 of the batteries in parallel. It didn't take long to realize it was going to take forever so I divided the batteries into packs of 4 and charged them in series with a 12v 10a automotive charger up to around 3.35v. I then charged each 4 battery pack in parallel with the 10a power supply until they reached 3.65v. One pack seemed like it didn't want to charge past 3.35v and I noticed one of the cells was a bit lower voltage than the other 3. I removed the low cell and replaced it with another cell and finished top balancing the pack up to 3.65v. When charging the last pack of 4 cells it didn't want to charge beyond 3.35v. Again the same low cell was the culprit so I removed it and top balanced the other 3 to 3.65v. I tried charging the low voltage cell for several hours. The power supply seemed to be working hard because the cooling fan was staying on most of the time and the voltage would not exceed 3.35v. I didn't want to burn up the power supply so I shut it down.
Should I order another 3.2v 280Ah battery or is it possible that there is some other way to save it? -Best regards S4m22
Should I order another 3.2v 280Ah battery or is it possible that there is some other way to save it? -Best regards S4m22
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