The International Energy Agency forecasts that renewables will make up nearly 90% of electricity generation by 2050, propelled largely by solar and wind power. But that will open up a supply gap, because these sources are intermittent by nature. Storage solutions such as batteries can help close this gap to some extent but are not a complete solution to provide a fully reliable and stable grid. The need will still be there for ‘baseload’ clean energy sources – that are available on a continuous, uninterrupted basis.