Using old laptop batteries to build homemade powerwalls
The comments here are more evidence the "hacker" part of hacker news really no longer applies :)<p>In seriousness - of course putting this in your house is a a pretty risky and likely dumb idea.  I absolutely have plans to do this though, just with a fire resistant (concrete block) "power shed" 50 yards away from my house.<p>Someone that can build a working DIY powerwall can cheaply build a cinder-block shack and run conduit back to the living quarters.  If you can't afford to do that I'd say you can't afford to do the project at all.