What is a photovoltaic solar panel?
Photovoltaic solar panels convert sunlight into electricity with semiconductor cells, unlike solar thermal collectors that capture heat.
How it works and where it is used
1. How it works Photons help generate moving charges in semiconductor cells; connected modules supply direct current. An inverter can convert it for AC loads or a grid. 2. Applications and examples Rooftop and ground arrays produce electricity. Rated power differs from annual energy, which depends on sunlight, shade and temperature.
Limits and good practice
3. Limitations and security Panels do not generate at night; storage or grid access is needed for continuous supply. Roof, fire and electrical safety require competent design. 4. Practical considerations Estimate output using local sun and shade data, and include permits, maintenance, inverter life and end-of-life materials.