PHOENIX — The lone incumbent seeking reelection to the state’s utility regulatory agency is defending the panel’s decisions to cut programs that encourage use of renewable energy and eliminate most rebates for energy efficiency purchases.

And Republican Kevin Thompson said while he has nothing against solar, the technology has not yet come far enough to make it reliable — even in a state with so much sunshine.

“Battery technology is not where it needs to be to cover nighttime,” he said during a televised debate Tuesday at KAET-TV, the Phoenix PBS affiliate, among candidates who are running for the two open seats on the five-member Arizona Corporation Commission.

Consider, he said, a dust storm that hit the Phoenix area last year about 3 p.m., the beginning of peak electricity demand. He said Arizona Public Services and Salt River Project, the two utilities that serve the area, lost more than 2,000 megawatts of solar power. Thompson said that is the equivalent of one of the three units at the Palo Verde Nuclear Generating Station going offline.

“And they had to go to the natural gas ‘peakers’ to keep the grid up and running,” he said, referring to power plants that can be easily turned on to meet peak needs, albeit with natural gas which is a fossil fuel.

What Thompson did not say, though, is that if Arizona did not have solar energy, utilities would have had to run their regular power plants to replace that electricity.

Democrat Clara Pratte said the commission should actually push utilities to pursue more electricity from solar. The key, she said, is affordability.

“Right now, solar energy is the cheapest form of energy on the market,” said Pratte. She is the co-founder of Navajo Power, which works with tribes to develop renewable energy.

Pratte said she is not opposed to an “all-of-the-above” approach to energy sources. But she said the emphasis should be on renewables “versus being dependent on imports that are coming into our market.”

“With solar, we can be generating our own energy and become energy independent at a time when we need extra energy,” Pratte said.

Fellow Democrat Jonathon Hill said he, too, believes the commission should be pursuing “balance.”

“But they also shouldn’t be putting their thumb on the scale,” he said. And that, Hill said, means not just promoting one source over another but also not creating disincentives for people to pursue renewable energy.

He pointed out that the commission just last month allowed two utilities to reduce what they pay customers who have rooftop solar for the amount of excess electricity they generate into the grid.

Thompson defended that decision.

“Ratepayers were subsidizing other ratepayers to have solar on their house,” he said. More to the point, Thompson argued that was not fair because it wasn’t helping lower-income people who need the most financial relief.

“Right now the only people purchasing rooftop solar are the middle and upper-middle class individuals that can afford it. And it’s the low-income and fixed-income folks that are subsidizing that,” Thompson said.

Hill responded that if Thompson and his fellow Republican commissioners are so interested in helping those on limited income, the panel would not have voted in July to repeal separate energy efficiency rules that provided breaks to customers who purchased things designed to save energy, “to do the things that will ultimately drive utility costs down.”

Thompson said the decision was the result of the commission reviewing energy efficiency programs that had been in place for decades, all without being evaluated for how effective or useful they were at achieving their goals.

Some, he said, made no sense.

“We were subsidizing homebuilders to install energy-efficient appliances,” Thompson said, to the tune of $250 million a year, all paid for from surcharges on rates paid by utility customers. “Can we even find a non-energy-efficient appliance nowadays? No.”

Ditto, he said, for paying customers to install shade trees.

Anyway, Thompson said, the commission did not eliminate everything, keeping programs that paid customers to install things like weatherstripping, insulation and even high-efficiency air conditioning units, “the things that actually make an impact on people’s bills.”

Pratte did not dispute that the costs of utility programs designed to improve electric efficiency have been passed on to all customers. But she called it minimal.

For example, Tucson Electric Power in 2024 estimated the average customer’s monthly bill went up about $2.31 a month. But the company said that the reduction in power usage benefited customers by postponing or avoiding the need to build new power plants.

Pratte said that price tag is worth paying.

“The long-term impact of those energy efficiency standards were really impactful in saving money in the long term,” she said. “That’s where we have a difference of opinion on what is effective and what is not.”

Moderator Ted Simons asked Thompson about claims by those who were behind the energy efficiency standards that they helped stabilize utility bills, stabilize grid reliability, and reduce pollution.

Among those making those claims is current Democratic Attorney General Kris Mayes — then a Republican on the commission in 2010 — who helped create the standards in the first place. But Thompson sniffed at the assertion.

“I think if you look at it, the people who were behind that were the people who were making money off of those programs,” he said. “Again, it wasn’t helping the people that it was intended to help.”

Those decisions to scrap the programs were shared by Nick Myers who, like Thompson, ran for reelection.

Myers, however, was not at the Tuesday event to defend his votes. That’s because in the Republican primary, while Thompson placed first among the three contenders for two slots on the ballot, Myers ran third behind state Rep. Ralph Heap.

Heap also was not at the Tuesday event and has declined to participate in debates. He also is in trouble with the Citizens Clean Elections Commission, which is investigating whether he failed to disclose money spent buying campaign signs before he got certified for public funds for his campaign.