National Solar Capacity Ranking: 25th
National Energy Storage Capacity Ranking: 8th
Updated June 2026
Hawai’i is a leading solar market driven by strong resource potential and high electricity costs, resulting in widespread adoption across the state. Solar supplies nearly a quarter of the state’s electricity, with high levels of rooftop deployment and growing integration of energy storage. While continued growth is expected, the island grid structure and interconnection constraints remain ongoing challenges as solar penetration increases.
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.
2,313 MWdc
1,881 MWh
25th (34th in 2025 additions)
605,828 homes
23.67%
2,525
94 (2 Manufacturers, 64 Installers/Developers, 28 Others)
$5.5 billion
739 MW over the next 5 years (ranks 42nd)
127,640
Hawai’i has a strong policy and regulatory framework supporting energy storage, driven by its high electricity costs, islanded grid, and commitment to a 100% renewable energy goal. The state has achieved significant progress in integrating storage to support grid reliability and high levels of solar generation.
Regulatory efforts have focused on distributed energy resource programs, time-of-use rates, and compensation structures that encourage both front-of-the-meter and behind-the-meter storage adoption. While market design continues to evolve, Hawai’i remains a leading market for solar-plus-storage.