Midsummer AB engages in the manufacture and supply of solar energy technology solutions for the production and installation of thin film solar panels. It uses Copper-Indium-Gallium-Selenium, a tetrahedrally bonded semiconductor, with chalcopyrite crystal structure to convert the energy of light directly into electricity by photovoltaic effect. The company was founded by Sven Lindstrom, Alf Linder, Goran Lombäck, and Eric Jaremalm on June 15, 2004 and is headquartered in Jarfalla, Sweden.