06 Jul Solar energy is becoming the main source of electricity in the U.S.A.
06/07/2016 source “America Economia”
Solar power walks for the first time to be the source that delivers more electricity to the grid of the United States this year.
According to industry members and some independent reports, this feat was achieved more for economic reasons than by green incentives, but the truth is that the cost of electricity from solar plants on a large scale is now comparable – and sometimes even cheaper – to generated by natural gas, even without the incentives to promote clean energy.
Improved by the appeals to self-sufficiency and the environment care, and by public subsidies, the solar industry was initially dominated by the solar installations on the roofs to provide light to homes and individual businesses.
Currently are the large systems that sell directly to power companies who dominate the market and are expected to represent more than 70% of new solar capacity to be added to the network this year.
The success of solar energy on a large scale has raised doubts about the advantages of continuing to encourage facilities in small-scale terraces and roofs, which are still much more expensive than most other forms of electricity and require strong incentives to result attractive to the owners of the villas.
The cost of large solar power plants without subsidies ranging from 50 to 70 US Dollars per megawatt/hour (5 to 7 cents per kilowatt/hour), compared to 52 to 78 Dollars of the most efficient gas plants, according to a 2015 study of the Lazard investment bank. However, producing energy through panels installed on the roofs of residential houses is still much more expensive: between 184 and 300 Dollars per MW/hour without subsidies, according to the same report.
Matt Freedman, an attorney for The Utility Reform Network, an organization of California that defends the interests of customers of service companies, says that solar production is efficient if it is carried out on a large scale in the fields, but that it isn’t in small scale in our own homes. “If we take a solar panel from the rooftop of somebody and sets it in the field, the amount payable for such electricity drops precipitously,” he said; but “where’s the fun of having it on the roof? It’s not clear.”