We have spent so much time digging into grid energy storage solution, and well this, might be the most promising solution we've come across. The ESS Iron Flow Battery requires no lithium, nickel, or cobalt. The only ingredients are water, salt, and iron. Flow batteries aren't perfect, and they aren't made for every application, but when it comes to grid energy storage, there's a LOT to love about the ESS Iron Flow Battery! Let's dig into it, on this episode, of Two Bit da Vinci!