CA Traveler wrote:
pianotuna wrote:
3tons,
I do know of one case where the battery management system totally drained an Li bank and destroyed the batteries over the time frame of one year.
I do know of one person who attempted to charge an Li when it was too cold--that also resulted in destruction.
Shorai battery recommends a refresher charge every six months.
Sounds like a faulty BMS system or design for one case and ignorance in another.
The BMS was operating as designed--so not faulty.
I agree that the low temperature charging was an issue--but that leads to poor design of the BMS. It should have included low temperature protection.
I do agree that the person attempting to do the charging was not willing to listen to his little brother (me).