Tucson-based UNS Energy Corp. posted a higher second-quarter profit but missed Wall Street revenue estimates as sales slipped at subsidiary Tucson Electric Power Co.
Tucson Electric Power Co. has won state approval to buy power from a planned wind energy farm near Willcox that would be the first utility-scale project of its kind in Southern Arizona.
A decade after Arizona scrapped rules to open the state's retail electric market to competition, state regulators are mulling a new move to allow consumers to choose their power providers.
Some business customers of Tucson Electric Power Co. were recently targeted in a scam in which callers demand payment of overdue bills under threat of having their power turned off.
State regulators have approved a rate increase for Tucson Electric Power Co. that will boost the average residential bill by about $3 to $4 per month.
Rodney Utley, left, and his wife, Kristin Courtney, bundled up on a cold January night for the Casino del Sol College All-Star Game. Cold weather caused higher-than-normal energy consumption, benefiting UNS.
Tucson-based UNS Energy Corp. posted higher first-quarter earnings as cold weather boosted energy demand.
Tucson Electric Power Co. residential customers can learn how to cut their power bills by joining a free program that allows customers to closely track their power usage.
PHOENIX - Environmentalists and solar-industry leaders are saying they fear that recent cuts to renewable-energy incentives by the Arizona Corporation Commission will lead to future reductions that could harm the industry.
WASHINGTON - In its first major regulation since the election, the Obama administration on Friday imposed a new air quality standard that reduces by 20 percent the maximum amount of soot released into the air from smokestacks, diesel trucks and other sources of pollution.
Carolyn Campbell, the executive director of the Coalition for Sonoran Desert Protection, inspects some of the 410,760 solar panels in a solar plant built by NRG Solar. The Avra Valley Solar Generating Station will produce 34 megawatts of direct current.
Jennifer Christelman, the environmental engineer division manager, and Curtis Woody, the economic development director, both with the town of Marana, autograph a solar panel.
An aerial view shows the 300-acre solar plant in Avra Valley. TEP will buy power from the solar farm, which can generate enough power to meet the annual energy needs of about 5,000 homes, under a 20-year agreement.
Fields northwest of Tucson that once yielded cotton by the ton are now producing clean electrical power, at the biggest solar power plant to be connected to Tucson Electric Power Co.'s power grid to date.
UNS Energy Corp., parent of Tucson Electric Power Co., posted lower third-quarter earnings as profits continued to be squeezed by an ongoing rate freeze and stagnant power demand.
UNS Energy Corp., parent of Tucson Electric Power Co., today posted lower third-quarter earnings as profits continued to be squeezed by an ongoing rate freeze and lower summer power demand.
Tucson Electric Power Co. will host veterans and their families at a free education and career fair this Thursday.
Environmental groups want federal regulators to place a partly coal-fired power plant in Tucson under regional regulations designed to curb regional haze.
On a sun-drenched expanse of former farmland in the Avra Valley area northwest of Tucson, a new project will soon begin harvesting a different kind of crop: energy from the sun.