Mainstream Energy corporation formerly known as Mainstream Energy LLC is a renewable energy company. It is mainly into developing products, projects and businesses that have the potential to help make photovoltaic. It also distributes solar and renewable energy systems and equipment for solar contractors, dealers, and installers. It also designs and installs solar electric systems to homeowners and small businesses. Besides, the company invests in solar concentrator, solar thermal, wind, biofuels, and other renewable energy technologies. The company is located in San Luis Obispo, California with warehouses and sales offices in Southern California, the Pacific Northwest, the Northeast, and Canada. Mainstream Energy has invested in two highly successful renewable energy companies AEE SOLAR AND REC SOLAR. AEE Solar offers solar and renewable energy products and services to bolster the growth of solar contractors, dealers and installers, primarily in North America. REC Solar provides cost-effective solar electric systems and services to business and residential consumers throughout the US. The company is headquartered at San Luis Obispo in California, the US.