They are easy to install, and knock chunks off electricity bills. It may not be Romeo and Juliet, but Spain’s balcony scene is heating up as the country embraces what has hitherto been a mainly German love affair with DIY plug-in solar panels.
Panels have already been installed on about 1.5m German balconies, where they are so popular the term Balkonkraftwerk (balcony power plant) has been coined.