CA rates come in 4 tranches based on usage. Last I checked, its $0.10/kwh for the first tranch, 0.2 for the 2nd, 0.3 for the 3rd and 0.4 for the highest. I don't remember the cutoffs between the different levels. Its also possible those rates have changed in the last few years. But that's how CA does residential power bills. Most people never get into the 2nd tranche.

PS Where I live now, its $0.04/kwh and that's pretty normal in the rest of the US and in Latin America.

That is not at all how PG&E billing works. You can see the current rates and billing structure at https://www.pge.com/assets/pge/docs/account/rate-plans/resid....

> Last I checked, its $0.10/kwh for the first tranch,...

That is completely wrong.