Solar panels produce electricity through the photovoltaic effect. Each panel is made of many solar cells, usually built from silicon. When sunlight hits a cell, photons (light particles) transfer energy to electrons in the silicon. Those energized electrons flow through the material and create an electrical current.
Solar cells are arranged into modules with metal contacts that collect current and send it to an inverter. The inverter converts the direct current (DC) produced by the panels into alternating current (AC), which is the standard form of electricity used in homes and on the grid.
Key components in the process:
Panels also include anti-reflective coatings and textured surfaces to capture more light. Modern systems often have monitoring electronics to track performance and safety devices like breakers or rapid shutdown units.
Factors that influence how much electricity a panel produces include the solar irradiance (intensity of sunlight), panel orientation and tilt, temperature, shading, and panel efficiency. While the photovoltaic effect is the fundamental science, practical system output depends on installation quality and local conditions.
For homeowners and businesses, the main takeaway is that panels directly convert sunlight into DC electricity which is then made usable for appliances through an inverter. That simple chain—sunlight to electrons to usable power—is the core of how solar electricity systems work.