Utilities always need to justify rate increases with the regulator.

The bulk of cost increases come from the transition to renewable energy. You can check your local utility and see.

It’s very easy to make a huge customer like a data center directly pay the cost needed to serve them from the grid.

Generation of electricity is more complicated, the data centers pulling cheap power from Colombia river hydro are starting to compete with residential users.

Generation is a tiny fraction of electricity charges though.