Mr Musk...please hear out Dr Jim Conca...For all we know ' he is'.... ______________ "Lithium ion batteries are what we know now. They can pack a lot of energy storage in a small, light battery, making them the battery of choice in small electronics such as laptops and cell phones. But Li-ion batteries have too short an operating life and have issues such as rapid heat generation. For the near-future, they will dominate the small-volume niche such as personal devices and electric vehicles, but for the utility-scale commercial battery market, we need bigger systems that last longer. Vanadium batteries The latest technology to emerge is the vanadium redox battery, also known as the vanadium-flow battery. And the best one seems to be from WattJoule, especially because their cost is so much lower than other V-flow batteries. V-flow batteries are fully containerised, nonflammable, compact, reusable over semi-infinite cycles, discharge 100% of the stored energy and do not degrade for more than 20 years. The Earths crust has much more vanadium than lithium, and we produce twice as much V as Li each year." https://energypost.eu/can-vanadium-flow-batteries-beat-li-ion-for-utility-scale-storage/