More than 110sq m (1,184sq ft) of photo-voltaic solar cells have been installed on the roof of the National Trust's (NT) carriage museum at Arlington Court, near Barnstaple.

Up to 6.3 megawatt hours of energy will be generated a year, helping to save £600 on electricity costs and raising £2,270 through the sale of energy back to the national grid. The scheme will also preserve some of the historic carriages on display at the museum by reducing the amount of ultraviolet light that enters the building.

Arlington Court property manager Ana Chylak said: "With these panels we can make a small contribution to the power we use as well as protecting our amazing carriages." The museum is one of 25 NT properties to benefit from a partnership with npower to support eco-friendly schemes.