The solar industry is the sector of the economy that is focused on the design, manufacture, installation, and maintenance of solar power systems. The industry is composed of companies that manufacture solar panels, inverters, and other components, as well as companies that provide installation and maintenance services.

The global solar industry has grown rapidly in recent years, driven by declining costs of solar technology, increasing concerns about climate change, and supportive government policies. As of 2021, solar power is the fastest-growing source of renewable energy worldwide. The total installed capacity of solar power systems has been increasing at a compound annual growth rate of around 20% since 2010.

The main market for solar power systems is in residential, commercial and utility-scale. Solar panel manufacturers are mainly from China, Taiwan, and other Asian countries, and most of the solar panel products are exported to other countries. The solar industry also includes companies that specialize in energy storage, smart grid technology, and other related fields.