同社のCEO イーロンマスク氏が語ったところによると、（事前の観測記事とほぼ同じ内容）
Musk launched the Powerwall home battery, a rechargeable 7-10 kwh lithium-ion battery, priced at $3,000-$3,500 for installers, with deliveries slated in three to four months. It's available in a selection of colors.
The size is 130 cm (51.2 inches) high, 86 cm (34 inches) wide and 18 cm (7.1 inches) deep.
"You don't need a battery room …A normal household can mount this on their garage or the outside wall of their house and it doesn't take up any room. It's flat against the wall," Musk said. "It's designed to work with solar system out of the box."
Tesla will need to open more "Gigafactories," in addition to the one planned as well as offering open sourcing of the technology, Musk said. Tesla plans to build the battery packs at its $5 billion Gigafactory just outside of Reno, Nevada. The massive plant will employ 6,500 workers and has the potential to crank out a half-million lithium-ion batteries by 2020.
