The Powerwall is a lithium-ion battery developed by Tesla Motors for home use. Tesla started developing it in 2012, and the previous year it was in the pilot demonstration phase. Full production will only begin when the construction of the Gigafactory 1 plant in Nevada is completed, it will be the second largest plant in the world, smaller only than Beoing’s aircraft plant in Washington. Part of the factory became operational in the first quarter of this year. The powerwall was originally announced on April 30, 2015 with a stable output power of 2kW, and a 3.3 kW peak output, but Musk, CEO of Tesla Motors, said that power would more than double without increasing the price of the battery. After March 2016, there is only a model with 6.4 kWh capacity, although in 2015 Musk announced two models, 7kWh and 10kWh. The price of the model is 3000 US dollars. After six months, one of the first customers to pay $ 16,000 for the entire solar installation with Tesla Pawerwall says his electricity bills have dropped by about 90%. His family has also changed their energy consumption habits and mostly use the devices during the day to use solar energy for “harder tasks.” But not all that positive, the customer said there is currently no point in entering the project from a purely financial perspective and how the project will not pay off within the warranty period of the device, and of course the purchase and financial profitability also depends on the price of electricity and the location where you are. Tesla currently sells Pawerwall systems in the following countries: the United Kingdom, Switzerland, Germany, Austria, the Netherlands, Belgium, South Africa, Australia, and the United States.