Lithium Vs. More Solar
Having learned so much from members here since my initial posts in early 2018, I've been grateful that the learning curve has been relatively steady, and informative. I've truly appreciated the guidan...
Forum Discussion
vermilye wrote:3 tons wrote:I agree that it must be either a poorly designed BMS or defective. I have a pair of Battleborn Li batteries, drained them to 80%, and let the trailer sit with the battery disconnect switch off. After 6 weeks, the Victron monitor read 79.9%.
Per Pianotuna:
“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 suppose almost anything is possible in ‘one case’ (or say, even several cases - ??) where a defect might be present, yet I don’t necessarily see that as an ubiquitous flaw that affects an entire genre of battery type - the literature I’ve read appears to suggest otherwise...Either way, leaving any battery unattended for a full year will not be one of my real concerns - lol!
3 tons
I believe you would be wrong of a poorly designed bms or defective it did exactly what it was suppose to do.
They put the bus in storage plugged in thinking that they would be back in 6 months and not shutting the batteries down. Sometime during the 1.5 years in storage while they were away sailing there was a power outage, the batteries were on powering the bus till the bms did shut them down for low voltage, but on the Elite Power Solution GBS batteries there are sense boards (part of the bms) on every cell which has a 2 LED lights, 1 will stays on if it's connected to the battery and the other led will turn on if balancing is happening on that particular cell. That led light on 20 cells was enough to eventually suck the juice from the cells.
There is a "max" of 3% discharge per month claimed by the Elite. If they had stored the batteries at their full 380ah and properly shut the system down they would of been ok for roughly 30-33 months. We know that if they will be stored for unknown period of time all you have to do is take the sense boards off and they will last even longer.
Their battery failure was their own fault.
Here is their video. https://youtu.be/0j0zcRXTDRk
I have the same battery system. ;)
