Grid Tied System

Grid-tied systems are the most common and affordable type of solar PV system. The primary goal of a grid-tied PV system is to offset all or some of your electricity usage. Grid-tied systems are connected to the electrical grid, and allow residents of a building to use solar energy as well as electricity from the grid. Grid-tied systems do not need to produce 100% of the electricity demand for a home or business. When there is no demand for energy, the solar panels send excess electricity back out into the grid for use elsewhere. This excess electricity turns your residential meter backwards and in essence banks, you credits to use at night or on a stormy day. Owners of a grid-tied system may need to complete a net metering agreement with their utility. This agreement allows utility customers to receive credit for the excess energy they generate, typically credited as a kilowatt-hour credit on the next month’s bill. Net metering policies and agreements are different for each utility. Living with a grid-tied solar PV system is no different than living with utility electricity, except that some or all of the electricity you use comes from the sun. Grid-tied systems do not provide protection from power outages. When the electrical grid fails, grid-tied systems will not continue to operate. This allows utility employees to fix the power lines safely without wasting time identifying solar energy systems that are still feeding electricity into the power lines.
A benefit of a grid-tied system (as opposed to an off-grid system) is that the system size can be determined by your budget or preference—it doesn’t have to be designed to meet 100% of your electrical needs.

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