Hawaii’s Renewables Portfolio Standard commits it to obtaining 100% of its energy from renewables by 2045, and Hawaii proposes to do this by wholesale replacement of fossil fuel generation with solar. This approach is theoretically possible, but only if there is enough energy storage (approximately 10GWh) to match day-night solar fluctuations of over 3GW to a substantially flat ~800MW load curve and if grid stability can be mantained with dominant solar generation. The Renewables Portfolio Standard also covers only electricity generation, which presently supplies only about a third of Hawaii’s energy needs, so even if it’s met Hawaii will still fall well short of its 100% renewable energy target.
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