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Interesting situation. I've ordered and paid for 16x 277ah Cells from Alibaba - Shenzhen Xuba/Selina Li and Pina Long. During the initial conversation, I specifically asked for Grade A cells, and on the advice of a mate, requested Lishen. Pina confirmed all cells are Grade A. In checking the...

Recently noticed some increased in cell wire resistance values, powered everything down and put some new washers on all my cells, just steel, nothing exotic, little bit of carbon grease also because that's what the store had, and check connections where noticed a few connections between wire and...

ETC 277ah 48v pack JK 2a active balancing BMS. MPP 7248 Bulk Charge 54.4, float is 53.8v. Pack was top balanced in parallel for a good 2 weeks (3.6v/10a and let it drop to almost 0a draw) before it was put in service. Been in service a month and going well, but I have noticed 1 cell hitting...

The short version - I am seeing cell(s) triggering high and low voltage disconnects, which makes me suspect capacity issues, but it's not always the same cell which doesn't make a lot of sense... read on! Setup - JK 150a BMS (w/ 2a active balancing on from day 1) - Heltec stand alone 5a Active...

I have 2 arrays, 9 panels each, all same brand/model of 250w panel. Panels in each array are all oriented the same and are laid out similarly, 5 panels on the bottom row, 4 panels on the top row a little over a panels height further up the roof. All with Tigo TS4-R-O optimisers on them. No...

I have a JK BMS (2a active balancer model) and I would like to be able to monitor the BMS remotely, I can see no way of configuring alarms and having them emailed/pushed? While I wait for an answer from JK, I was going to leave a phone in my solar cabinet to run the app and remote in to it, but...

I can currently switch power source instantly in my shed from mains power to a 48v system using interlocked contactors, however when switching from mains to off-grid specifically, I'm getting some arc flash on the contacts in the mains contactor. I presume because as the contactors switch, the...

Wasn't sure where to post this. I can currently switch power source instantly in my shed from mains power to a 48v system using interlocked contactors, however when switching from mains to off-grid specifically, I'm getting some arc flash on the contacts in the mains contactor. I presume...

150A version 6 or so BMS is giving me a bit of grief on my 48v 16s 280ah pack. The unit has failed in the 2 or so years I've had it and 4 cell wires just stopped reading completely, and it was sent back for repairs (painful). Since then it has mostly been "ok" but increasingly I am seeing 1...