CBS 5 

PHOENIX--Maricopa County is close to finishing two of three solar panel installations on county buildings that doubles the original renewable energy goal.

More than 5,000 solar panels will produce enough energy to annually power 169 homes, a spokesperson said.

County officials estimate that the panels will generate the equivalent of 59 million pounds of carbon dioxide over a 20-year period and save $5 million in over a 30-year period.

The first two projects are at the Elections Department - Sheriff's Office Warehouse near Third Avenue and Lincoln Street will have 1,680 panels and the Facilities Management Department Building and Parking Garage at Fourth Avenue and Jefferson will have 2,212 panels.