The Tesla is an efficient (~105 miles per gallon equivalent model S) all electric car. Helps the environment, but you want to put Tesla products at you home, and save money. During the day, it charges from your solar panels. In the evening, when electricity is expensive and you can't get more power from your roof, the power wall releases the electricity into your home. You can buy multiple for $3,000 each (7 KwH. 10 KwH is $3500 per).This excludes installation fees. It also comes in different colors. Tesla is planning a gen 2 , but there aren't very many details on that. Tesla has also developed a Powerpack for use in major buildings. The capacity for them is 100 KwH per. You may ask "How does it work?". Well, here is how. The solar panel generates energy (see Solar Post ) Then, the energy goes to the Inverter and the Powerwall. At night, The Powerwall releases its energy into the inverter, which shows up in your electrical outlets. There is some competition fo...