Efficiency only matters in so far as it affects cost per MWh. It is plausible (from what I heard at least) that hydrogen is cheaper at the required scale than b

Efficiency only matters in so far as it affects cost per MWh. It is plausible (from what I heard at least) that hydrogen is cheaper at the required scale than batteries. After all we will likely have incredible oversupply during long summer days where electricity is essentially free. Scaling battery manufacturing to store enough power for a whole winter is difficult. In any case I think storage is something where „let the market figure it out“ is a reasonable strategy.