The cost of lithium-ion batteries for energy storage declined 65% in five years between 2010 and 2015, while battery storage’s use for electricity could hit 250GW by 2030, from just 1GW today, according to the International Renewable Energy Agency (IRENA).

The International Renewable Energy Association (IRENA) recently released its electricity storage technology roadmap, looking at how electricity storage can support the increased deployment of renewable energy.