Hawaii’s dominant electric utility anticipates that it will easily exceed future state renewable energy mandates through 2040 and possibly meet all its power generation needs with mainly solar and wind a decade earlier.

“The plan estimates that the RPS after 2030 could exceed 100% when taking into account customers' generation of electricity for their own use as well as the anticipated widespread use of battery storage,” Hawaiian Electric Companies (HECO) says in a statement, referring to its Power Supply Improvement Plan Update filed with the Hawaii Public Utilities Commission

At a minimum, HECO forecasts it will achieve 48% renewables penetration of its energy supply mix by the end of 2020 versus a 30% state requirement.