Coronavirus has thrust renewable energy into the limelight. In June last year it was predicted that the fossil fuel industry would undergo a $25 trillion (£20tn) collapse, while renewable energy would thrive, according to the International Energy Agency (IEA). Renewable energy currently makes up a third of the global energy supply, but there's a problem if demand is set to grow: storage. Many renewable sources including wind, solar and hydropower are reliant on weather and environmental conditions, so they need to be stored to provide a reliable supply. But solutions are being found. Click or scroll through some of the truly remarkable innovations companies have devised to make renewable energy storage a reality.