The Arithmetic of Sustainability - Part 5: The Physical Ceiling14 March 2020·1348 words·7 minsSustainability and Future Solar Energy Solar-Thermal Photovoltaics Desert-Solar Energy-Import Sustainability Policy and Critique Systems ThinkingBritain's renewables max out at 18 kWh/d/p. This post calculates solar potential from rooftops to deserts to bridge the 48 kWh/d/p gap.