National Solar Capacity Ranking: 4th
National Energy Storage Capacity Ranking: 3rd
Updated September 2026
Arizona is one of the sunniest states and a leading solar market — with huge growth potential. SEIA is working with local stakeholders and policymakers to encourage stability and transparency so that the market can continue to grow.
SEIA’s Major Solar and Storage Projects List is a database of all U.S. ground-mounted solar projects, 1 MW and above, that are either operating, under construction or under development.
13,198 MWdc
26.5 GWh
4th (6th in 2025 additions)
1,953,899 homes
18.23%
9,768
365 (74 Manufacturers, 157 Installers/ Developers, 134 Others)
$24.2 billion
18,435 MW over the next 5 years (ranks 3rd)
337,098
Arizona law contains detailed consumer protection provisions, including regulations on door-to-door sales, advertising requirements, prohibition of deceptive practices, and a construction recovery fund.
Specific to the solar industry, A.R.S. § 44-1763 details contract requirements and disclosures for distributed generation. Companies who lease or sell solar systems to consumers in Arizona must provide a certificate that the system complies with Arizona law and must receive specific acknowledgment from customers on contract terms, including warranty information, cost, payment schedule, utility rates, and others.
Arizona is a leading energy storage market, supported by rapid solar expansion and strong market fundamentals.
Streamlined interconnection processes and supportive policies are enabling faster deployment, while utilities continue to procure storage to maintain reliability as solar penetration increases. Arizona’s hundreds of solar and storage companies invest billions in the state annually, positioning the state as a key hub for both deployment and manufacturing.