(4.4 GW). As noted above, solar power has surged, with 3.104 GW installed capacity and 2.801 GW under construction in July 2020. At a power auction in October 2015, three solar generators offered power at $65 to $68 per MWh and two wind farms offered power at $79 per MWh, vs. coal power offered at $85 per MWh, and an average price of $104.3 per MWh at an auction in 2008 with no wind or solar power offered. In the August 2016 auction, the Spanish company Solarpack was one of the winners with a proposal to sell power beginning in 2021 from a new 120 MW solar facility, Granja Solar, at $29.1 per MWh, an international record low price at the time. On March 2, 2020, Solarpack began supplying power from Granja Solar, 10 months early; rated at 123MW, this raised Solarpack's current Chilean capacity to 181MW. Wind and geothermal At the end of 2021 Chile was the 28th country in the world in terms of installed wind energy (3.1 GW). In the year 2008, wind power amounted to 0.05% of the total electricity generation, but was projected to grow rapidly in coming years. By August 2020 2,242 MW, 8.8% of the National Electric System's installed generating capacity, was wind power, and wind power was also 25.6% of the 5,990 MW in additional capacity currently under construction. Because southern Chile receives prevailing westerlies of the roaring forties and furious fifties, it has some of the most promising wind power potential in the world. At the turn of the century, there was increasing interest in the country's geothermal potential. In 2006, after a surveying campaign, a consortium formed by the National Petroleum Company (ENAP) and Enel requested a concession to develop geothermal resources in the El Tatio region in the North. In August 2020 Chile had 45 MW of installed geothermal generating capacity, 0.2% of the national generating capacity. History of the electricity sector Electricity sector reform of 1982 Chile represents the world's longest running comprehensive electricity reform in the post-World War II period. The reform was led by the 1982 Electricity Act, which is still the most important law regulating the organization of the electricity sector in the country. The reform was similar to the UK's model and started with vertical and horizontal unbundling of generation, transmission and distribution in 1981. According to Cambridge economist Michael Pollitt, the reform is