Grid-tie complete solar electric systems are for homes and businesses that are connected to the utility grid already. The solar electric panels produce electric power (DC) during the day and serve the needs of the homeowner. Any extra power produced by the system and not consumed by the owner, it can be diverted back out into the grid, helping reduce overall power needs during peak daytime periods and serve as a credit to the customers account. At night, the electricity comes from the grid. In other words, if the solar electric system produces more power than needed during the day, the electric "credit" is used at night. Also, electrical power "credits" that come from over-production in summer can be used the next winter, too!
A properly designed system will produce enough power for one day. The good news is that if it doesn't, the homeowner won't be without power; they will just pay for the any electric power taken from the grid.
Sanyo GTS Systems
