Russia's targeting of Ukraine's power infrastructure demonstrates that decentralised solar photovoltaics (PV) and storage can help maintain critical services when centralised grids fail. New analysis suggests European Union rooftops could meet 40 % of long-term electricity demand by 2050, yet the technology remains under-deployed. This 'What if' discusses how the EU could treat building-integrated solar not as a green add-on, but as a deliberate pillar of energy security.
