The grid-tied, on-grid or grid-interactive solar system is the most common type of PV system.
In this battery-less system, the solar generation is first used to meet the demand of the existing loads and any excess generation is exported to the grid. If there is a short-supply or no solar generation, then the required energy is imported from the grid. A bi-directional net meter records the exported and imported electricity and the consumer is charged only for the net electricity consumed from the grid at the end of the billing cycle.
Compared to an off-grid system, which has batteries, this system is generally more efficient, cheaper, easier to install and requires less maintenance.
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