San Diego would quadruple the amount of solar power used by city facilities and save an estimated $22 million over the next 20 years under a plan the City Council has approved on Tuesday. Solar power would cost the city an estimated $26 million compared to the $48 million if they were to pay San Diego Gas & Electric to power those buildings over the span of 20 years.

The solar energy installations are estimated to generate 6 megawatts of electricity per year, enough to power about 3,000 typical San Diego households.

The project is set to begin in March at 25 sites including libraries, recreation centers, police stations and other city-owned buildings and properties. Going solar will save taxpayers thousands of dollars each year that can help fund additional facility improvements and city services. The solar power systems would also improve safety in San Diego because most would be lighted at night.

The deal would also support a key goal of the city’s proposed Climate Action Plan of producing more local power from renewable energy sources to reduce carbon emissions.