A recent development in renewable energy technology is 'grid-interactive’ or two way grid interconnection. These systems use sophisticated control equipment so that when your renewable energy system produces more power than you need, the excess power is fed back into the grid. When your system doesn't produce enough power, then you get power from the grid. Some electricity retailers offer 'net billing' arrangements, so that they buy the electricity you produce at the same price as they sell their electricity to you. |