Generate power with your solar panels & rather than sell it to "the grid" (typically for next to nothing), why not sell it to your neighbours?
That is exactly what is being trialed in Western Australia using the blockchain.
Hopefully this takes off with more communities getting together & supporting it in their area.
One step closer to Tesla's dream of free elec? Maybe
Time will tell
https://www.ccn.com/australia-power-ledgers-blockchain-energy-platform-goes-live-in-fremantle/