I have been building for about 5 months now. Mostly I work on battery packs for small scooters but took on a big project for the winter to convert a Vespa Style gas scooter to an electric one. Also built a 7s10p power pack for emergency use. I will get to the power wall eventually. Solar is not very popular here yet.Welcome Mike.
So you joined.... are you thinking of building a Powerwall or just interested in the topic of 18650 cells etc.