PETALUMA, Calif. & HONOLULU--(BUSINESS WIRE)--Enphase Energy, Inc. (NASDAQ:ENPH), has successfully upgraded the operating behavior of approximately 800,000 of its smart microinverters installed in Hawaii, better integrating the PV systems into Hawaii’s changing island grids. This unprecedented technological accomplishment is a result of ongoing collaboration between Enphase, Hawaiian Electric and other industry partners to find technical solutions for integrating high levels of PV in Hawaii at