
The renewable energy world received news last week that the two largest photovoltaic plants in the world are going to be built in California, and the power will be sold to Pacific Gas & Electric. This is a sign that utility companies are making the necessary investments to meet their mandated renewable portfolio standard (RPS). Furthermore, the significant scale of this project should encourage an increase in solar power investment.
With a combined maximum generating capacity of 800 MW, and an expected yearly output of 1.65 billion kilowatt hours per year, these two plants will put out more than 12 times as much electricity as the largest grid-tied photovoltaic installation in the world today. Comparatively, Spain has a 23 MW plant, Germany is building a 40 MW plant, and the Nellis Air Force Base in Nevada is currently the largest already-built solar power installation in the U.S with 14 MW.
Pacific Gas & Electric will buy the power from the solar plants, and will use it to meet their state mandated goal to get 20 percent of its electricity from renewable sources by 2010. Although the plants, being built by OptiSolar and The SunPower Corporation, are not expected to be up and running until 2012, this is still very encouraging news that the utility companies are building renewable capacity to keep up with their RPS.
This is also very encouraging for Village Green Energy, as our methodology is directly linked to generating more renewable energy in the states with renewable portfolio standards. Village Green is the only retailer that sources RECs exclusively from these compliance markets, guaranteeing the concept of additionality. This means Village Green is buying RECs away from electric utilities that need them to meet their state mandated quota of renewable energy, thereby forcing the utilities to buy more renewable energy to meet the quota.
So as plans for the two largest solar plants in the world were unveiled last week to be built in central California, customers of Village Green Energy should feel good about their efforts to drive the transition to renewable energy by voluntarily purchasing green power.
This news should also give critics of photovoltaic technology something to think about. The scale of the systems and the high costs of materials and connection to the electric grid are often cited as limitations for why solar energy can’t satisfy the energy-hungry needs of our society. But at this size, the plants’ costs would be much lower than photovoltaic installations of the past, and PG&E says they will be competitive with other renewable sources such as wind power and power from solar thermal plants.
If successfully built, these two gigantic plants can not only achieve economies of scale, but they also have the potential to significantly lower the manufacturing cost per unit, and be a major market driver towards the transition to clean energy.
Another encouraging sign earlier this month addressed the shortage of polysilicon, which has been a holdup for solar expansion. Polysilicon is a key ingredient used to make solar cells, and the rapid growth of the solar industry has caused shortages and pushed prices to over $400 per kilogram from just $30 a few years ago. In an effort to expand the supply of the ingredient and reduce the costs of solar energy, The World Bank made a $50 million investment in a Russian polysilicon producer, Nitol. Nitol’s projected output of 3,700 tons of polysilicon a year is about 9 percent of last year’s global supply.