Wine Service Co-Operative, a wine storage and distribution center in Napa, Calif., has commissioned a total 424 kW solar electric power system.

The project will consist of two systems, 195 kW and 229 kW, installed atop the St. Helena and South Napa facilities in Napa Valley. Furnished by PowerLight Corp., Berkeley, Calif., the solar arrays, combined with energy efficiency measures, should provide nearly 100 percent of the facilities' annual energy needs, substantially reducing operating costs. The project is scheduled for completion this summer.