LiFePO4 woes in Caribbean

[poiu]

Originally Posted by kmacdonald

For LiFePO4 voltage is not a good SOC measuring tool. To balance the cells correctly they should all be fully charged and then connected in parallel for a period of time. A wet finger in the air won't get it done to any degree of certainty.

Sorry, disagree with you again. Firstly, once you get below say 2.9v the voltage reading is a very accurate way of measuring residual capacity. Second, if the cell has got damaged as in the case of the OP and without a BMS, it makes more sense to bottom balance. An overcharge should be still possible to prevent with a conservative setting on the chargers and with the bottom in balance, it is easy to prevent an undercharge with normal monitoring.