Enel Green Power expands solar capacity at Stillwater (USA) hybrid power plant

Rome, March 20th, 2012 - Enel Green Power, the Enel Group's renewables company,

operating in North America through its subsidiary Enel Green Power North America, has

expanded the capacity of the Stillwater solar power plant connected to the binary-cycle

geothermal power plant.

This has increased the grid-connected photovoltaic power capacity of this innovative

plant located in Churchill County, Nevada from 24 MW to 26 MW. The plant also has a

geothermal capacity of 33 MW.

This is the first hybrid renewable energy project in the world that combines the

continuous generation capacity of binary-cycle, medium-enthalpy geothermal power with

the peak capacity of solar power, allowing NV Energy, which holds a contract to buy all of

the energy generated by the plant, to better satisfy the energy needs of its customers.

The solar power plant will generate around 43 million kWh of clean energy per year,

enough to meet the needs of over 16,000 American households as well as avoiding the

emission of around 30,000 metric tons of CO2 into the atmosphere each year.

Combining two technologies to produce electricity from renewable sources at the same

location not only increases the generation of zero-emission energy (which, in this case,

will exceed 200 million kWh/year, avoiding the emission of around 140,000 metric tons

of CO2 into the atmosphere each year), but also makes it possible to use the same

infrastructure, such as, for instance, electrical interconnection lines, thereby further

reducing environmental impact.

The entry into service of this new plant brings Enel Green Power's total installed capacity

in North America to more than 1,000 MW.