Video is short but gives a thorough explanation of solar photovoltaic systems. How do they work? Sunlight is captured and converted from light to electricity. The electricity that is made from the convertor is DC (direct current) and needs to be changed to AC (alternating current) by an inverter. Batteries are attached to the inverter to provide electricity to the house when there is no sun. The inverter provides the electricity needed in the home. When a home has a solar power system they do not need to buy power from the electric company and then save money. This is also good for the environment. This is a good basic video on solar power. Good video for elementary grade level students. Run time 02:04.