Currently much of the Utility Generated Electricity we use comes from Coal and Oil. Not to mention they won't be around forever. We no longer need to rely on others for our basic needs. Earthships completely support this type of system. Solar Energy is produced using Solar Panels to convert sunlight into energy.
Wind turbines turn generators producing energy.
This energy can be stored in batteries until needed. New models are very efficient reaching ratings of 95percent conversion efficiency. Energy bills have led us not to care about how much energy we consume. When you produce your own energy, however, you learn the importance of efficiency and well designed systems. Off the grid homes must incorporate energy conservation in order to keep system costs under control.