You would think so, but I've been following this for 4 years and there are huge issues to resolve. There is a pre existing grid designed to distribute electricity generated from imported oil which is now woefully out of date. There is huge home solar usage in Hawaii but the grid is incapable of redistributing surplus power created by owner panels. Storage for redistribution at a reasonable cost is the big challenge there, and is being watched closely by other regions and places before they emulate...

From the Energy Dive article I linked to:

'At the end of 2016, about 26% of Hawaiian Electric’s customers’ electricity was sourced from renewables, Greentech Media notes. Customer owned solar power was the largest contributor at 34% of the renewables total, followed by wind, 29%, and biomass at 19%.

On the Big Island of Hawaii renewables accounted for 54% of customers’ needs and on Maui and Molokai it was 37%.'