The U.S. is seeing record levels of investment growth in clean energy projects and with more than $9 billion in new investment in 2007, is set to become the world’s largest wind power market by the end of next year.
Revenue growth at wind power companies totaled about $30 billion last year and is expected to soar to $83 million in 2017, according to industry research firm Clean Edge. Revenue growth across the clean tech sector was around $77.3 billion last year, Clean Edge wrote in a March report.
Amid this burgeoning interest in clean energy the Department of Energy has laid out a scenario in which wind-generated energy would provide 20% of total U.S. energy output by 2030, or about 300 gigawatts, when electricity demand nationwide is expected to reach 5.8 billion megawatt-hours. 
Wind power capacity nationwide is currently around 18.3GW and projects totaling some 5.74GW capacity are currently under construction, industry advocate the American Wind Energy Association estimates. Texas outstrips all other states in both existing and planned project capacity, followed by California, Minnesota, Iowa and Washington, the AWEA said.
But even those growth levels remain far from the 2030 goal: Under the 20% wind scenario, wind power generation would provide around 1.16 billion megawatt-hours of electricity, enough energy in 2030 to displace around 50% of natural gas electric utility consumption and about 18% of coal consumption.
Reaching that goal isn’t without challenges. While the capacity of new projects online outpaces last year’s installation rate of 5.24GW, the pace of wind turbine installation would have to pick up to 16GW a year from 2018 through 2030 to reach 300GW, the Energy Dept. said.
The U.S. has more than 8,000GW of available land-based wind resources that could be captured economically. But increasing the capacity to generate even 300GW of wind power would involve high initial capital costs to install the production and transmission infrastructure – at today’s prices the cost of transmission expansion would be $20 billion, the report said. Turning the hypothetical scenario into reality would also require improving turbine technology, altering and adapting current electricity transmission systems and expanding wind power purchase markets. Government policy and regulation would also need to support the alternative resource.
In some cases, for example, new transmission lines connecting high-wind resource areas to load centers could be cost-effective, while in other instances, high transmission costs could offset the advantage of land-based generation.
Wind power has plenty of advantages over the conventional alternatives. Clean energy generation can increasingly take advantage of economies of scale, which will bring down costs for manufacturers, installers and developers, Clean Edge noted.
Wind power projects are cheaper to construct per megawatt than other alternative energy sources, the research company said. At $1.4 billion to $1.8 billion per gigawatt, utility-scale wind turbines provide electricity at a better rate than both nuclear and solar power plants, at $2 billion to $6 billion and $5 billion to $10 billion per gigawatt, respectively.
Wind power in the U.S. emerged in California amid the 1970s oil crisis, when the cost of electricity generated from oil rose along with higher crude prices. The industry thrived with the sustenance of new government tax credits and contracts that included state-mandated minimum levels of alternative energy. But as tax credits expired in the mid-80s and then were intermittently reinstated and withdrawn over the next 15 years, the wind sector sputtered. That’s the one major hiccup ahead, analysts say: the federal production tax credit for capital-intensive wind power facilities expires at the end of the year. If it’s not renewed, wind power could lose some of its appeal to investors.
That said, the prospects aren’t entirely dim. Americas Growth Capital analyst Zack Lesko sees large, publicly traded wind energy companies continuing to dominate the wind power landscape at the utility level. But the sector as a whole shows great promise, he said. “We believe wind energy is a particularly attractive and cost-effective solution to the increasing electricity demands of the U.S.”