Founded in 1892, Tucson Electric Power is a subsidiary of UniSource Energy and serves more than 375,000 customers in Southern Arizona. The company conducts photovoltaic design and installation and solar energy workshops. It provides materials for electrical safety and energy, as well as offers advisory services for low electric bills. Tucson Electric Power provides installation services for lighting, cooling, heating and ventilation systems. It offers benefits for the usage of biomass, biogas, daylighting, geothermal, hydro, solar and wind energy. The company offers energy saving tips and calculators. Tucson Electric Power administers community and low-income weatherization programs. It serves over 350 nonprofit agencies.