An analysis by Clean Energy States Alliance found 4-hour battery systems more economical than a new F-frame gas turbine, when considering the social costs of carbon and local pollution.

The Treasury Department is opening a second round of funding for 48C tax credits aimed at clean manufacturing.

Faltering energy system performance — which almost caused rolling blackouts — and insufficient scrutiny and transparency after the fact must not be the new normal with winter storms.

The company also said in its latest quarterly report that it had increased its potential liability from a FERC audit of its accounting and other practices to $27 million, and it warned the liability could grow.

The state is attracting residents and industry, resulting in “robust” first-quarter sales, said Andrew Cooper, chief financial officer of APS parent Pinnacle West.