It all really comes down to battery cost. If Tesla's gigafactory does what it says it will do, in seriously reducing cost per kwh, then a huge home storage market will open up naturally.
The projections do seem a bit heroic, though. People seem to have been predicting cost reductions in batteries for the last 15 years, but they don't seem to have come to fruition.
http://reneweconomy.com.au/2014/citigroup-solar-battery-stor...
http://reneweconomy.com.au/2014/ubs-time-to-join-the-solar-e...
It all really comes down to battery cost. If Tesla's gigafactory does what it says it will do, in seriously reducing cost per kwh, then a huge home storage market will open up naturally.
The projections do seem a bit heroic, though. People seem to have been predicting cost reductions in batteries for the last 15 years, but they don't seem to have come to fruition.