Since 2009, the Arizona Attorney General’s Office has received more than 500 complaints about rooftop solar, ranging from “Do Not Call” list violations to a failure to disclose the total cost to a buyer.

Two Republican candidates for the Arizona Corporation Commission are asking pointed questions to the head of Arizona Public Service, wary that the utility is secretly aiding their primary opponents in the race for seats on the regulatory agency.

Arizona’s energy regulators hunkered down this morning in front of an overflowing hearing room as users of solar rooftop panels urged them not to stifle the growth of residential solar in the state.

Seven months after publicly saying it was severing ties with the American Legislative Exchange Council last year, Arizona Public Service quietly renewed its membership with the conservative public policy group.

The staff of the Arizona Corporation Commission is recommending against any immediate reduction in solar incentives for customers of the state’s largest electric utility.

A report issued late Monday urges the commission to deny the July request from Arizona Public Service Co. to reduce by 30 to 60 percent the incentives offered to customers who opt for solar panel use.