It's a sheet of 0.040" aluminum in "Pepsi Blue". I got twice as much as I need for $4 on eBay. The heater pads are attached with RTV silicone gasket sealer to it and the battery cells sit right on top of it.
I agree with Short_Shot. Set your float to 12.6v.
I would also wire your loads so that no loads pull from the starter battery unless the engine is running. Don't use the built-in WiFi router (or anything else) that runs off the starter battery. Add another one that runs off the house...
My BMS came with the heater cables. They have an overtemp disconnect thermostat built into the cable assembly that you can see in the third picture.
Yes, Thats an active balancer by the BT module. I'm not sure I need it now that I have a few good cycles on my battery.
I would highly...
I just ordered a RPi 4 and ESP32 yesterday, starting down this road with Home Assistant. I was going to do just the house, but this topic might get me to do the motorhome as well. I will be following and posting if I have any success.
The seller says each of the two ports can support 10 watts max. They turn on at the lower temperature charge cutoff and back off at the release value. I bench tested this to be true. I do like that built in feature. As shown, I put 2 10W silicone heating pads, one on each port, on an...
B+ is to power the two heater circuits built into the board. The heaters are powered by the top two ports above the B+ marking in the pic. I don't think it's required for anything else.
I like the BMS so far. No problems.
A few pics of my 4S 280AH build with 150A JBD BMS with cell compression, Bluetooth, active balancer, and two 10W heaters all shoehorned into a marine 27 series battery box. The packing foam that the batteries came in makes great insulation and hold the battery in place.