Here's an interesting argument WHY you still might choose lithium ion (or whatever you use for automotive storage) for stationary storage instead of some other

Here's an interesting argument WHY you still might choose lithium ion (or whatever you use for automotive storage) for stationary storage instead of some other technology. Total electricity generation in 2012 was ~21k TWh. Say you need ~8 hours of battery storage daily (i.e. 1/3 of daily use). That works out to about 19k GWh of battery storage, assuming you can recharge daily. For reference, Tesla's Gigafactory produces ~35GWh of batteries per year currently. Total oil consumption for road transport was ~2k Mtoe in 2012. That works out to 23k TWh of energy. Assume you only need half of that when you go from a heat engine to an electric motor. Now you've got 11.5k TWh of total use. Now assume that you recharge your vehicle nightly. The world would need ~32k GWh of batteries to hold all of the energy currently used for road-going vehicles (given the above assumptions). The market for whatever battery technology that works for automobiles is the same order of magnitude as the market for grid-scale storage. If you're a battery maker, you can increase your total addressable market by selling into both automotive and grid-attached storage.