Those of us who know hurricanes dread the inconvenience of losing electricity over extended periods. Florida law prohibits grid-tied solar systems from functioning when the power goes out, rendering even the largest solar systems useless in the absence of batteries and costly equipment. Until off-grid systems become affordable, the most reliable form of energy after a disaster comes from natural gas powered generators. We recommend including a generator in your sustainable home or business project. And just as building performance measures lead to a less costly solar investment, adding a generator to an efficient home costs less.