Electric rates in Arizona RV campgrounds are regulated by the state if you are paying separate electric charges to the park owner based on an on site meter that is fed from a master meter. They are prohibited from "making a profit" on electricity and are supposed to post their purchase price as well as what they charge you.
The maximum they can add to the base rate is 10% and that is supposed to be justified by actual administrative costs incurred from the billing process.
We ran into an incident at the KOA Picacho-Tuscon campground in Picacho where they are charging .20 per KW, I contacted their supplier who informed me that the base rate was .10, they are doubling the rate. I am currently pursuing refunds through legal channels.
For more info, look into http://www.azhousing.gov/azcms/uploa...nant%20Act.pdf