Unless we have enough photovoltaic energy production to close down all coal plants, the "limitless" part isn't really there. And even then it is cheaper to stor

Unless we have enough photovoltaic energy production to close down all coal plants, the "limitless" part isn't really there. And even then it is cheaper to store the electricity directly in batteries - they are even cheaper than the devices required for hydrogen fuel cell cars. Hydrogen fuel cell cars still need a battery, though a smaller one, then the expensive fuel cell and finally the gas tank which has plenty of issues by itself.