MEMPHIS, TN — FedEx Corp. subsidiary FedEx Express inaugurated a solar-powered hub yesterday at the Cologne Bonn Airport in Germany.

The new center serving Central and Eastern Europe is FedEx Express's second solar-powered hub and the fifth solar facility within FedEx Corp.

News of its launch was among the many announcements in the past month about solar projects, including installations for Massport Logan Airport, Macy's and solar parks in Canada.

GlaxoSmithKline celebrates a solar milestone today with the start of work on a 3-megawatt roof-mounted installation at the firm's distribution facility in York, Pa.

The FedEx Express hub in Cologne has a fully-automated sorting system that can process as many as 18,000 packages and documents an hour. The facility's rooftop solar power system covers 16,000 square meters and produces about 800,000 kilowatt hours a year. The installation is the largest at a FedEx Express site and is among the bigger roof-mounted arrays in the North Rhine-Westphalia region.

The five solar facilities within FedEx Corp. reduce annual carbon dioxide emissions by an estimated 3,918 metric tons, according to the company. Other recent FedEx sustainability efforts include the addition of all-electric delivery vehicles to fleets in Paris and Los Angeles.

In Massachusetts, two Massport Logan Airport terminals, Bridgewater State College, Worcester State College and the Canton Housing Authority will be the sites of rooftop solar projects as a result of agreements announced this month between Ameresco Inc. and the Massachusetts State Department of Energy Resources

Under the 20-year power purchase agreements, the five solar power systems -- which Ameresco will design, construct, finance, own, and operate  -- will have 560 kw of electricity capacity and generate 700,000 kwh of electricity annually. The installations will be equipped with advanced Internet-enabled measurement and monitoring systems, according to Ameresco. The host sites will be able to buy solar energy at discount.

Macy's reports that construction has begun on a 3.5-megawatt high-efficiency solar power system on the roof of its online fulfillment center in Goodyear, AZ. When it's completed in March 2011, the array will edge out the GlaxoSmithKline installation for bragging rights as the largest solar power system on a single rooftop in the United States. 

Macy's installation is expected to deliver the equivalent of 70 percent of the electricity needed by the 600,000-square-foot facility. The system is being designed and installed by SunPower, which will provide ongoing operations and maintenance services.