The Grid-connected PV System is the most common for residential applications because it is the cheapest solution compared to the Stand-alone system. A normal Grid-Tied PV does not have any storage for electricity produced but instead, it is directly connected to the grid.

If you generate more energy than what you are using at home, you can use the extra electricity and sell it to the grid. This is called Net Energy Metering (NEM), a scheme introduced by the government that allows solar homeowners to get rebates/credits from the Distribution Licensee (TNB).

You can also add storage to your Grid-connected System. The storage acts as backup power when there is an outage and can be used to power critical loads. In addition, the storage can be charged with electricity coming from the grid and also from the solar arrays.