The largest accumulator on earth was created in China in Hebei province by BYD company, which produces energy storage sources together with the state electric grid Corporation of China.
The largest battery in the world launched on December 25, 2011 can save up to thirty-six megawatts of electricity, and it is powered by solar panels and wind turbines with a total capacity of 140 MW. This energy storage device is already included in the unified state power grid of China and together with other similar facilities already reduces the cost of 1 kWh of energy.
With full disconnection of the mains supply of electricity heavy duty battery enough for hours of energy to provide 12 000 large apartment buildings.
It is not known how soon this complex will pay off, because more than $ 500 million was spent on its creation, but today it is clear that the construction of the world's largest battery was a challenge for energy professionals around the world, who are only limited to talking about the importance of the structure and the use of similar devices for storing electricity.