According to Reuters, the United States are planning to modernization of state grid, the project is expected to cost $476 billion, after more than twenty years. But according to the photovoltaic industry experts said that it will be $2 trillion worth of benefits for the user.

The so-called "smart grid" can not only save energy, reduce cost and improve the reliability of the transmission, and two-way communication mode is adopted to control.

"The implementation of the smart grid will be an ongoing process. With the development of technology and cost down, it is becoming the most effective way of energy supply and demand." The electric power research institute (EPRI) smart grid project director Matt Wakefield said at a news conference on Tuesday.

In order to make dreams become a reality, the smart grid system, a non-profit said EPRI electric power research and development institutions, power companies need to invest $17 billion to $24 billion a year, and for 20 years. Most of these costs will be passed on to consumers.

American association for the study of the power of a researcher Clark Gellings believes that we need to tell consumers this will be a new energy system upgrade, it will greatly reduce the cost, although electricity bills will not immediately get the "shrink".

Gellings said that by 2050, the electric power research institute estimates that if smart grid once put into use, electricity bills will rise by about 50% on average. If failed to achieve, then the electricity may rise by an average of 400%.

GE, ABB, Siemens, Google, IBM, Toshiba, world famous technology companies such as cisco and Microsoft is flexing its muscles, compete for the supply of the smart grid infrastructure.