ENFIELD — Solar panel manufacturer STR Holdings Inc., will shut down operations at a Florida factory and consolidate into a central facility in East Windsor.

STR expects to exit its 20,000-square-foot leased facility in St. Augustine, Fla., by the end of the year. Production will be consolidated into its 275,000 square foot East Windsor facility along with machinery and employees from Enfield and Storrs. The company expects 45 jobs to be lost as a result of the Florida closure.

A company statement says the move is motivated by a slow market, as well as a desire to operate at a lower cost.

The closing is expected to result in $1.2 million in pre-tax charges, less than half of which will go toward employee severance and other costs. STR says it expects pre-tax cash savings of $1 million annually.

The plant closure comes after STR was recently named the top company in the energy/environmental category by the Connecticut Technology Council in Connecticut’s 2011 “Marcum Tech Top 40,” which ranked the fastest-growing tech companies in the state.

 STRATFORD — Sikorsky Aircraft Corp. has brought a new heat and power facility online to supply 84 percent of its two-million-square-foot facility.

The power plant is expected to provide 85 percent of the facility’s steam heating needs while reducing greenhouse emissions by more than 8,900 metric tons (equal to 1,600 automobiles) annually. The plant’s energy output equates to the annual energy use of about 1,100 area homes.

The power facility took three and a half years to build and cost more than $30 million, financed by capital investment by the company and from a state cogeneration incentive grant in the amount of $4.66 million.

The company last year installed 450 solar panels on the roof of its engineering building as part of another effort for cost savings and generation of clean energy.

The new facility was dedicated to the late Walter Joseph, who worked for Sikorsky for 32 years and helped in the planning and construction of the facility.