tesla to produce batteries for solar storage - battery energy storage system

Los Angeles -
Tech entrepreneur Elon Musk announced Thursday night the development of a new battery system to store solar energy for later use, addressing a key obstacle to the wider use of renewable energy.
In a speech in Los Angeles, he said: "The obvious problem with solar energy is that the sun does not shine at night . "
His regional design studio for electric vehicle company Tesla motor.
This means that the power grid that uses solar energy still needs a backup power supply, usually generated by coal-fired or natural-gas power plants in the United States.
He said that the batteries that the new company Tesla Energy will produce are the "missing parts" of solar energy that are more widely dependent on solar energy, storing the energy generated when sunlight shines, so that it can be used without sunlight.
He said that the ability to "power small cities" Tesla Energy will produce batteries for residential use, as well as scalable battery systems with a capacity of up to 1 GWh, which "can serve Boulder, Colorado
Tesla Power Wall, he said, is a stackable residential battery with a capacity of 10 KW, each for $500 and will start shipping in three to four months.
In 2012, the average American household used about 380 KW hours a year.
German families average 413 KW hours a year.
S. Department of Energy said in a 2013 report that storage "can actually 'smooth' the power delivery generated by wind and solar technologies, increasing the value of renewable energy.
"Electricity storage is" what is needed for the transition to a sustainable energy world, "Musk said ".
Musk is second in the United States.
The largest maker of solar cells, the city of solar energy, and SpaceX, a pioneer in electric vehicles, Tesla motor and space transport.