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Maui County 41% renewable energy

Maui County registered the highest percentage of renewable energy use by Hawaiian Electric subsidiaries in 2019 — 41 percent — higher than on Oahu and Hawaii island, Hawaiian Electric reported Wednesday.

The renewable energy came from a mix of solar, wind and biofuel-produced power. The 41 percent was a 3 percentage point increase from 2018.

Renewable energy use was 35 percent on Hawaii island and 25 percent on Oahu, the utility reported. Hawaiian Electric’s total renewable energy portfolio was 28.4 percent over the three counties, up from 27 percent in 2018, despite the loss of geothermal power on Hawaii island from a volcanic eruption.

However, the 28.4 percent was below the 30 percent state mandate by 2020. Hawaiian Electric said that the percentage would have been met with power from Puna Geothermal Venture, which would have added an estimated 3.7 percentage points to the utility’s total.

Hawaiian Electric also cited a decrease in wind power, 527,887 megawatt hours in 2019, down from 602,007 the previous year; and an increase in demand due to record high temperatures, which reduced the renewable energy percentage.

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