The completion of large grid-scale projects and residential solar systems has provided a 21% increase in solar capacity on Hawaiian Electric's five island systems. This was an increase from 745 MW in 2018 to 902 MW at the end of 2019. There are now an estimated 3.5 million solar panels producing electricity on the company's five grids.

Three solar arrays built by Clearway Energy Group totalling 110 MW and Hawaiian Electric's West Loch solar array producing 20 MW came online on Oahu, Hawaii, in 2019.

In addition, nearly 3500 new systems across Oahu, Hawaii Island and Maui County were completed, supporting the company's drive to reach the state's next milestone of 30% renewable energy by the end of 2020.

Residential rooftop solar systems installed on Oahu, Hawaii Island, Maui, Molokai and Lanai rose by 4.6% from 74 331 in 2018 to 77 801 in 2019.

On Oahu, 33% of single-family homes now have rooftop solar; on Hawaii Island, 20%; in Maui County, 27%.

Including commercial and grid-scale units, there are now 81 783 solar systems online, capable of producing 902 MW.