Rooftop PV reduces building retrofitting costs by up to 50%

Cambridge researchers have analyzed the benefits of installing a PV system on the roof of an apartment building in addition to energy refurbishment and have found that photovoltaics, especially if combined with heat pumps, makes retrofit projects more affordable. A group of scientists from Cambridge University has investigated the economic benefit of combining a basic energy-efficiency retrofit with the installation of rooftop PV and has found solar arrays help to reduce retrofitting costs considerably. The team conducted its analysis on two postwar apartment buildings in Germany's city of Aachen. ...

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