A new report from the International Energy Agency (IEA) foresees a surge in the uptake of solar energy in the coming decades on the back of rapidly declining costs, making it the single largest source of energy by mid-century.

IEA’s Technology Roadmap: Solar PV 2014 says the cost of all solar technologies will plunge in the coming decades, projecting that solar photovoltaic and utility-scale solar rates plunging to as low as $US0.04 per kilowatt hour, while solar thermal with storage drops to $US0.064 per kilowatt hour, based on capital costs…