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Strangely, I have one cell triggering an under voltage disconnect and another triggering an over voltage disconnect. I presume the error has something to do with the average between the two cells, but that’s pretty vague. The bms is a jbd, 4 cell 280ah battery about 1.5 years old. I...

I’ve just had my first under temperature shut off and it doesn’t appear to be resetting. I just noticed that today, but it could have happened anytime in the last week or so. Most of that time my panels were parked out of the sun. As I understand it the reset is at 5c, but all probes...

This is a good reason to buy quality cells. The argument about redundancy is important, but I don’t know how much you lose maintenance wise with a 2p4s over the years. This is a common upgrade question, including for me. The other option I’ve considered is a 24v battery which would avoid...

As I understand it direct inverter connections bypassing the BMS are recommended. How then do you protect your battery when the inverter protection is set for lead acid? I have a 4s 280ah with a ‘dumb’ 60/30 Daly BMS. The critical load is a 250w oxygen concentrator that will run all night.

Ok, I have a modest 4s 280ah bank with a dumb Daly 60/30 bms with a ten gauge p-. My inverter is a 600 watt GoWisthat has a lead acid low voltage activation of 10.6 which is way to low. I don’t think there is a simple solution to this, but if anyone has any tips it would be helpful. The...

https://www.electricbike.com/building-a-safe-high-amp-battery-pack-from-flat-pouch-cells/#comment-10769

YouTube just fed me a review of this product, 100ah at 48 volts for $1,500. And a low temp BMS. https://www.signaturesolar.us/products/h7590c9c2a/2203789000006324403

I’m just about to pull the plug on a 4 cell Alibaba purchase and I think I’ve figured out how to manage the issues. The two known good suppliers I’ve contacted are Amy Wan at Luyuang and Selena Li at Xuba. Ms Wan was formerly at Xuba and has left to start her own company. Ms Li is her...