NOYITO 100A 4S 3.2V Lithium Iron Phosphate Battery Protection Board 12.8V with Balance Over-Current Over-Charge Over-Discharge Short-Circuit Protection

It is exactly what I was looking for. Just a pity there is no specification sheet with it.

Overall, the design of this BMS is pretty good in my opinion. However, you are provided 3 holes for the negative terminal, each of which seems to fit a 14G (stranded) cable at MAX. With this being the case, I'm not sure how it would be capable of handling 100Amps. Anyway, for my purpose it shouldn't matter as the max current draw I plan for this specific setup will be around 55Amps, and will only be for short periods of time, but single core 14G copper wire can handle a MAX of 24A. I used 3 to create the P- terminal, so theoretically, this should be able to handle 72Amps without issue. However, this is still a far cry from 100Amps. There is a reason why more expensive BMS's like Daly come with the Negative Terminal Wire pre-installed, and it is ususally 4G wire with a ring terminal. Overall, for the price it seems to work well.

I used this BMS to build a LifePo4 pack for my radio. The BMS was paired with a set of Headway 38120 cells. BMS does of great job of topping off all the cells and monitoring for cutoff voltage. Will be getting a few more.

For the two 4s LifePo4 batteries I have built, they balance and charge just fine.

Build with 4 lifepo cell to 12v for solar system, good for me thanks

Difficult to say if it really works on the balancing side as there are no indicators and you need to measure cell by cell. I do not believe it can safely support 100A currents, not even 50A with the very thin conductors to be soldered directly to the board.Zero documentation...After few months of evaluation on 100A LFP 4S setup it proves to work well. I didn’t even try to load or charge with more than 20A, although soldered three wires per output that theoretically could support 50-60A. The board with the small components can’t be robust and safe enough for anything over 30A. Will use it for low current circuit on board (electronics, lighting etc) and trust a more robust house LFP setup of 2x300A each for all other consumers. (Plus two AGM batteries for the starter and charging bridge with DC-DC charger to the LFPs to protect the alternator.

Seems to be working

The BMS works fine, but I suggest you get an additional balance lead wiring harness. The wiring for this BMS is backwards from traditional balance boards and chargers. Just keep that in mind. The only reason I am giving it four stars.