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I just received 5 JBD-SP04S005 V1.5 BMS's with the uart to usb adapters from the vendor "Minerals" off AliExpress. They came well packaged and the shipping was from DHL. Included were the harnesses as well as 9 external NTC's (one was missing)...more about those later. I haven't ordered my LFP's...

First off, I need to point out that if I was starting from the beginning I would have greatly simplified my life with a 48V setup and a single BMS. However in order to be compatible with my WhisperGen PPS-16 (a co-generation unit that produces 18K BTU and 70A of charging current on 1 1/2 pints...

Hello All, Everything I have been reading on this forum is saying that 3.65V is the maximum safe overcharge cutoff. The Heltec BMS in the link below seems to be perfect for my application, a 4s 280ah, except for the 3.75v and to a lesser degree the lack of low temp cutoff, which isn't that big...