So I have read that if you use the same 18650 based battery packs as Tesla motors uses and you only discharge them to 40% and only charge them to 70% they will last 40000 charge cycles.
My idea is to build a root celled and have a large freezer in it. I want to have 3 battery packs in there to run the freezer.
Each packs 30% would be sized to run the freezer lights and maybe a small fan for one day. I wish to have 3 such battery packs in there.
So on day one it discharges battery 1. on day 2 it discharges battery 2 and charges battery 1. On day 3 it discharges battery 3 and charges battery 2. And so on and so forth.
I want to use an external BMS/ charger that is also an inverter or one that can communicate with the inverter to accomplish this.
Why, 1st to have a function system for decades. 2nd to lower future expenses, 3rd greater independence from globalism and supply chains.
The help I need is finding this BMS/ charger , inverter. Search engine are becoming counter productive.
Technical.
Estimating 1.6kwh hours a day
Will use about 400 watts solar
Will diy or find used 5.3 kWh battery packs.
Thank you for reading to this point and any help.
