solarpanel

A solarpanel is a photovoltaic module that converts sunlight into electricity. It contains an array of solar cells, typically made of silicon, encased in a protective laminate with a glass front and backsheet. When exposed to light, photons knock electrons loose in the semiconductor, creating an electric current in a process known as the photovoltaic effect. The generated direct current is usually converted to alternating current by an inverter for use in homes or businesses.

Panels are grouped into modules and connected into larger arrays to meet energy demands. Most residential and commercial panels use crystalline silicon, including monocrystalline and polycrystalline types; thinner-film technologies such as cadmium telluride (CdTe) or copper indium gallium selenide (CIGS) are also produced but are less common in standard installations.

Performance varies with technology, temperature, and mounting. Typical efficiencies range from roughly 15% to over 23%. Modules degrade modestly over time, commonly about 0.5% to 1% per year, giving lifespans of 25–30 years or more. Installation considerations include orientation, tilt, shading, and mounting hardware. System designs may be grid-tied with net metering or stand-alone with battery storage, using different inverter types.

Environmental and economic aspects: solar panels reduce greenhouse gas emissions during operation, with energy payback times that depend on location. End-of-life recycling is increasingly available. Standards such as IEC 61215 and 61730 govern design and safety, while electrical codes ensure safe integration with the grid.