Florida-based New Energy Technologies Inc has demonstrated a spray-on solar PV product that enables electricity to be generated from glass and other surfaces.

The company claims that, in commercial applications such as the building facades of office towers, its "SolarWindow" can generate more than three times the energy of conventional rooftop solar systems because the product can be applied to the extensive glass surfaces on commercial skyscrapers, rather than just the rooftops.

The electricity-generating coating can be applied at room temperature and glass remains transparent after being coated with the product.

New Energy Technologies expects to publish comprehensive performance data in coming weeks, following completion of independent, third-party measurement and engineering validation.