[cucuuc]

If you know what you're doing go ahead. I certainly won't stop a hacker from hacking. Don't expect your insurance company to share my general liberalism towards DIY.

If you don't know what you're doing, go right ahead anyways. It's not my house and my family in there.

But this is hard.

Did you know that DC can't use AC switches rated for the same voltage?

How about cooling the packs? whats the appropriate distance between the packs as the geometry of the heat dissipation changes from 1D to 2D to 3D?

Are you going to cool with forced air or passively? If forced, what if there's a power outage during battery bank failure (highly correlated know that you wired the bank to the mains). If passive, how do you ensure that the environment is always providing suitable cooling?

That's a bit of domain knowledge that most ppl who know how to wire a socket don't know. That's also a house fire type mistake when your dealing with a battery bank.

[SwellJoe]

You're talking about building a Powerwall from scratch. I'm talking about installing a pre-fab Powerwall as sold by Tesla.