If you are in a location that is "On Grid", meaning that you get traditional power resources, you can use solar power or wind power to supplement or entirely offset your traditional utilities. These systems, whether powered by wind or sun are usually called "On Grid" or "Grid Tie" systems. When you install your solar power electric system or your wind power electric system you can tie it into your traditional electricity meter using a grid tie inverter. As you generate power, your system automatically detracts from your own electricity meter thereby reducing your bill.
If you produce more electricity than your home actually needs, it is automatically sold, at cost prices, to the utility company further offsetting your costs. Using a solar grid tie or wind power to grid interface will not only help you offset utility bills, but you also avoid costly batteries and systems that you would need to hold the excess power you are generating.
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Grid tie inverters are a key component to your solar panel electric system or wind power electric system. Grid tie inverters convert DC power generated by solar and wind electric systems into AC power used by most domestic electrical devices and your grid tie power inverter will do the same, pumping AC electricity back into the electric "grid" and offsetting your power consumption and cash outlay.
A solar grid tie inverter system is significantly simpler and less costly than solar inverter systems that are completed disconnected from the electric utility grid (off-grid). A grid tie inverter system essentially consists of just four major components in addition to the wiring: solar panel array, solar panel mounts, the grid tie inverter itself, and overcurrent protection (fuses, combiners boxes, and disconnects). Whereas, off grid inverter systems require the addition of solar charge controllers, battery bank and additional overcurrent protection and wiring.