Great link. It's also amazing how Solar power generation falls significantly in the winter months. For instance, December output is less than 10% of June!
Having a "Tesla battery pack" at your home is more than just handling grid fluctuations. What if the battery pack can act as a supercharger for your car? It's like having a tank of gas in your garage all the time.
Chart here: Check out monthly/weekly energy production for 2014 https://www.energy-charts.de/energy.htm