I’ve found Anker’s small batteries to be of high quality. I own a Tesla Powerwall which works well and has nice integrated software and seemed like the best option without a heavy DIY lift as of a few years ago.

Great to see competition here as it will drive more innovation. It will be interesting to see how the software picture will evolve:

Smarter appliances and electric vehicles that talk to the power controller to charge or do more work when there is excess power would be a big level up for these systems.