There's a race going on to build the next generation of energy storage technologies using gravity, chemicals, or heat to store clean electricity for long periods of time.And that's where our guest, Ramya Swaminathan, comes in.Ramya is the CEO of a company called Malta. Malta is building an electro-chemical battery that converts renewable electricity into heat. It's like a giant version of the heat pump in your air conditioner, using commercially-available, off-the-shelf parts.Malta's heat-pump battery could provide energy to the grid for half a day -- and potentially, multiple days.In 2018, Malta was spun out of X, the moonshot factory established by Google's parent company. Since then, Malta has raised more than $76 million to commercialize its storage system. Investors include Breakthrough Energy Ventures, a firm started by Bill Gates; Dustin Moskowitz, a Facebook founder; and Alfa Laval, a Swedish company that makes heating and cooling equipment for heavy industry.Malta aims to have power-plant sized facilities serving the grid by 2024. Emily Kirsch talked with Ramya about how her background in investment banking and hydropower development prepared her for scaling an energy storage business.Watt It Takes isbrought to you by Google. Google is pioneering the electricity systems of the future with its effort to source 24/7 carbon-free energy by 2030 -- so that everyone can have round-the-clock, carbon-free energy everywhere they operate, in every hour of the day. Learn more.Watt It Takes is also brought to you by Nextracker. Nextracker is advancing the connected power plant of the future across five continents.Powerhouse partners with leading corporations to help them lead the next century of clean technology innovation. Powerhouse Ventures backs founding teams building innovative software to rapidly transform our global energy and mobility systems. You can learn more about Powerhouse at powerhouse.fund.To hear more stories of founders building our carbon-free future, hit the “subscribe” button and leave us a review.