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Tesla Motor Inc. associates work on a Model S at the company’s factory in Fremont, California. More than 100,000 plug-ins have been sold in California, according to data from HybridCars.com and Baum & Associates, though electric vehicles make up less than 1 percent of all U.S. car sales. Photographer: David Paul Morris/Bloomberg

Here’s why something as basic as a battery both thrills and terrifies the U.S. utility industry.

At a sagebrush-strewn industrial park outside of Reno, Nevada, bulldozers are clearing dirt for Tesla Motors Inc. (TSLA:US)’s battery factory, projected to be the world’s largest.

Tesla’s founder, Elon Musk, sees the $5 billion facility as a key step toward making electric cars more affordable, while ending reliance on oil and reducing greenhouse gas emissions. At first blush, the push toward more electric cars looks to be positive for utilities struggling with stagnant sales from energy conservation and slow economic growth.

Yet Musk’s so-called gigafactory may soon become an existential threat to the 100-year-old utility business model. The facility will also churn out stationary battery packs that can be paired with rooftop solar panels to store power. Already, a second company led by Musk, SolarCity Corp. (SCTY:US), is packaging solar panels and batteries to power California homes and companies including Wal-Mart Stores Inc. (WMT:US)

“The mortal threat that ever cheaper on-site renewables pose” comes from systems that include storage, said Amory Lovins, co-founder of the Rocky Mountain Institute, a Snowmass, Colorado-based energy consultant. “That is an unregulated product you can buy at Home Depot that leaves the old business model with no place to hide.”

J.B. Straubel, chief technology officer for Palo Alto, California-based Tesla, said the company views utilities as partners not adversaries in its effort to build out battery storage. Musk was not available for comment.

The Tesla systems are arriving just as utilities begin to feel increasing pressure worldwide from the disruption posed by renewable energy.

Lima Meeting

In Germany, the rapid rise of tax-subsidized clean energy has undermined wholesale prices and decimated the profitability of coal and natural gas plants. Germany’s largest utility EON SE (EOAN) said this week it will spin off its fossil-fuel plant business to focus on renewables in part because of new clean energy competitors coming onto its turf.

Threats to the traditional utility model come as energy and environment take the world stage at the latest round of United Nations climate talks that began Dec. 1 in Lima. Delegates, backed by global environmental groups, want to leave the conference with a draft agreement to tackle climate change by lowering carbon-dioxide emissions — something that has eluded them for years.

The Rocky Mountain Institute’s Lovins has installed solar on his house in Snowmass and uses it to power his electric car. His monthly electric bill: $25. He has a lot of company.

100,000 Plug-ins

In California, where 40 percent of the nation’s plug-in cars have been sold, about half of electric vehicle owners have solar or want to install it, according to a February survey by the Center for Sustainable Energy, a green-energy advocate. More than 100,000 plug-ins have been sold in California, according to data from HybridCars.com and Baum & Associates, though EVs make up less than 1 percent of all U.S. car sales.

Few homes and businesses use solar and back-up-battery storage, proof for some utilities that the systems remain a hard sell outside of states like California or markets like Hawaii where high power costs make solar competitive.

Still, the Edison Electric Institute, a trade group representing America’s investor-owned utilities, recently announced that its members will help to encourage electric vehicle use by spending $50 million annually to buy plug-in service trucks and invest in car-charging technology.

“Advancing plug-in electric vehicles and technologies is an industry priority,” said EEI President Thomas Kuhn.

Charging Stations

Analysts think the industry has been slow to react. Tesla, SolarCity and green-energy companies are already moving aggressively into unoccupied space. “Some of the more nimble companies that think and move more quickly, they are beating the utilities to the punch,” said Ben Kallo, a San Francisco-based analyst for Robert W. Baird & Co.

Tesla has installed 135 solar-powered fast-charging stations across North America where its Model S drivers can refuel for free. NRG Energy Inc. is building a network of public charging stations in major cities that drivers can access on a per-charge basis or for a flat monthly fee of about $15.

And then there’s the home front. In a July report, Morgan Stanley said Tesla’s home and business energy-storage product could be “disruptive” in the U.S. and in Europe as customers seek to avoid utility fees by going “off-grid.”

Source: http://www.businessweek.com/news/2014-12-05/musk-battery-works-fill-utilities-with-fear-and-promise