Solar energy systems have been increasing the percentage of energy they contributed to the global energy supply. One of the fastest growing types of solar energy systems uses photovoltaic (PV) cells. The graph below shows the solar power generated in one day in a town in Germany in the month of July.
Which of the following best describes how a homeowner using an off-the-grid PV solar system, as seen in the graph above, can power a home between 9:00 PM and 6:00 AM?
answer choices
Switching to the electrical grid to obtain power
Relying on sources like wind or hydroelectricity in times of darkness
Using excess energy from a sunny day stored in batteries for power
Burning wood to create heat and light for the home.
