You can technically do it. You will get the capacity of the smallest cells and the cells won’t stay balanced well while charging and discharging. I wouldn’t recommend it. I know you said you won’t drain it down much but if you did you would rely heavily on the BMS to protect the smaller battery...
If you have two battleborns in parallel that is going to be equivalent to #2. In other words if you have two independent 4S packs to make a bank the wiring will look exactly like #2. In the situation the BMS would just be hidden in a case. In short, #2 is the proper way to configure the system.
Watching that video I was a little concerned with the panel wiring. At the end of the day a licensed electrician should do the panel wiring anyway. I think we all just watch to see the inverters and battery wiring and setup.
I understand the concern but I wouldn’t worry about that to be honest. You should, in this case, install a breaker on the main line to the inverter that limits current to less than the combined rating of the BMSs. At the end of the day the BMS is most useful to protect the battery at the cell...
Lifepo4 cells are great but it sounds like for your specific application they may not suit your needs. You can always buy some of the 280 amp hour cells from alibaba and those would be very inexpensive for a lifepo4 battery if you don’t mind some DIY wiring. However, if you can’t be sure the...
There are some great solar powered well pumps out there. Check out the alt-e store. There is a guy on YouTube called Engineer775 who has videos of them getting installed. There are a lot of different setup with pumps, storage tanks, and pressure tanks, depending on your needs. If you could tell...
Here in South Carolina your well won’t need to be that deep so there are a lot of options. You can have a solar pump that pumps water out of the ground and into a storage tank. If you have a way to elevate the tank you can just use gravity for the water pressure. That way the pump would only...
Sounds like the cells are not balanced. You should bottom balance your cells and then fully charge them. After balancing if the cells are still not charging and discharging at very similar voltages then the cells are mismatched and probably shouldn’t be in the same pack. Also when Lifepo4 cells...