A grid interactive solar system:

• A. works only when the grid fails
• B. supplies power to as well as receives power from the grid as required
• C. always supplies power to the grid
• D. always receives power from the grid

Answer: (B)

A grid-interactive photovoltaic (PV) system uses solar energy to generate renewable power that charges batteries for use during power failures and feeds power into the electricity grid.
Grid-interactive systems are based on their grid-tied and off-grid counterparts.