There is no scientific way to run a  modern community of 1M+ people on only solar/wind. The largest demand, by several factors, is when there is NO generation(late afternoon-evening and night). HECO will tell you ,now, most communities use the smallest amount of electricity during the day(when everyone , basically, is at work or school). You need a back up source of E(like LNG) because there is virtually no real storage capacity for electricity from wind/solar produced during the day.(yes, sun goes down,wind slackens in eve-night). A real honest E plan would be multi-faceted including as many sources as you can come up with(and that includes Geothermal and waste-to- E plants). No unicorns or vegan lions,please from  Ige-norant.