What’s more ? Curious what it takes for large setups.

Proof of stake.

You need to put as much as needed to achieve 4 Ohm to ground or less. This can be up to ~ 10 stakes at a couple of meter interval, it depends a lot on the soil type.

For individual homes, it often takes three stakes, each several meters long (deep), placed in a triangular config, connected above ground.

A big ass steel anchor damn deep in the ground!