In 2000, the islands produced about 41 million kWh of electricity, entirely from thermal sources. In the same year, electricity consumption was 38.1 million kWh. Installed capacity totaled about 7,000 kW in 2001. Electra, the public electricity utility, maintains thermal power plants on Praia, Mindelo, and Sal; local councils operate 12 rural power plants. Ten wind generators of 30 kW each were in operation on Mindelo in 1991. Petroleum products were imported.