> Furthermore, most homes are allotted 3kW, upgradeable to 6kW for a fixed one-time fee, and perpetual fees in the monthly bill.

Are you sure of those numbers?

3kW is the max capacity of a single socket (at least in the UK). My electric shower is 10kW and electric hobs/cookers also need higher ratings than standard sockets. Here in the UK I believe that the standard domestic capacity is 100A per home (so about 24kW).