The PowerBox is based around a recycled/repurposed aluminum box and it ships fully assembled without cells and it requires the end user to disassemble it, load it with 168 18650 cells and reassemble it back together. The Entire process can be done with a Phillips screw driver and a couple of sockets. It has a 60A Battery Management system that keeps the battery cells balanced and safe. Includes a battery level meter that can remain continuously on or off.
Here is a large Installation using these (36kwh)