Are there any utilities that have progressive rates electricity rates? Where the first X kWh are $0.12/kWh, the next Y kWh are $0.15/kWh, and then anything over Z kWh are $0.18/kWh, etc?

Though it seems that nowadays, much of that cost goes to taxes and fees, rather than electricity rate itself.

Texas has all sorts of options. Most power usage here is structured where individuals can select which Retail Electric Provider (REP) to use. They essentially wholesale energy from the grid. I had the (dis)pleasure of searching for a new contract after ours expired so have a refreshed memory of options: - flat rates

- discounted for more or less spend

- credits issued at X usage (which is only good at X specifically because its generally an expensive rate but it’s a marketing ploy for filter based searches).

- free or discounted night time or weekends

- etc.

If you can imagine they charge a certain way, there is likely someone trying it.

UK utilities and a lot of others have regressive rates: you pay a standing charge per day, so low users pay proportionally more per unit consumed.

Most Indian discoms (power distribution companies) have progressive slab rates for households.

Georgia has this.