Rooftop solar systems top 120,000 on Hawaiian Electric grids

Rooftop solar systems top 120,000 on Hawaiian Electric grids
Half of Oʻahu customers in single-family homes now have rooftop solar
HONOLULU, Jan. 27, 2026 – Hawaiian Electric customers continued to add rooftop solar at a
steady pace in 2025, boosting the total number of systems to more than 120,000 across the five
islands the company serves.
The addition of 6,571 solar systems in 2025, most of which are residential, increased the total
number of grid-connected solar systems to 120,570, a 6% increase over 2024. Solar generating
capacity, which includes residential, commercial and grid-scale systems, rose to 1.6 gigawatts,
an 11% increase over 2024.

Hawai‘i has among the highest rates of rooftop solar adoption in the nation. Some 27% of
Hawaiian Electric’s residential customers and 45% of its customers in single-family homes have
rooftop solar. On Oʻahu, fully half of customers in single family homes have rooftop solar.

Hawaiian Electric experienced a surge in applications for residential rooftop solar and battery
storage systems during the second half of 2025 after the federal government moved up the
deadline for claiming the Residential Clean Energy Tax Credit to Dec. 31, 2025. Previously,
homeowners had until the end of 2032 to claim the full tax credit for qualifying clean energy
technologies. Hawaiian Electric received 6,552 applications from July through December 2025
compared to 4,770 applications for the same six months in 2024.
Smart Renewable Energy is the latest phase in Hawaiian Electric’s push to bring more
customer-sited renewable energy onto the grid in a fair and sustainable way. More information
about Hawaiian Electric’s Smart Renewable Energy program is available at Smart Renewable
Energy Programs | Hawaiian Electric.