Picture this: It’s a sunny, windy day, and solar panels and wind turbines are cranking out more clean electricity than the power grid needs. What if we could bottle up all that extra planet-friendly energy to use later, when the sun sets or the wind dies down?

That’s what Heat Storage Berlin is doing, according to Euronews Green. This innovative German company has created a device that stores surplus renewable energy as high-temperature heat, making it available on-demand as…