Lost his mind,
There is no way to store solar energy. Simple as that. Unless you have the huge amounts of batteries at your home to do this.
Tesla is selling the Powerwall which is capable of storing enough energy to run your appliances if you have several of them.
Like solar energy batteries are quickly dropping in price as well as increasing in the amount of energy they store. Powerwalls have been declining in price.
The Powerwall is the white fixture attached to the outside wall.
An article on the subject:
http://www.businessinsider.com/everything-about-tesla-powerwall-2-battery-2016-10