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Elon Musk Introduces His Solar Roof Tiles

Elon Musk Tesla Solar City Solar Roof Tiles

No One Saw Tesla's Solar Roof Coming By Bloomberg

Elon Musk just showed us the grand unification of Tesla: fast cars, big batteries, and a stunning solar rooftop.

On Friday evening as the sun descended over the old Hollywood set of "Desperate Housewives," Elon Musk took to a stage and fired up his presentation about climate change. It was a strange scene, with hundreds of people crowded into the middle of a subtly artificial suburban neighborhood.

It wasn't until about a minute into the speech that Musk casually let the crowd in on Tesla's big secret. "The interesting thing is that the houses you see around you are all solar houses," Musk said. "Did you notice?"

The answer, in short, was no. Like everyone else, I knew we were there to see Musk's new "solar roof," whatever that was supposed to mean. But try as I could as we walked in, I didn't see anything that looked like it could carry an electric current. If anything, the slate and Spanish clay roofs looked a bit too nice for a television set. This is the future of solar, Musk proclaimed. "You'll want to call your neighbors over and say 'check out the sweet roof.' It's not a phrase you hear often."

The roof tiles are actually made of textured glass. From most viewing angles, they look just like ordinary shingles, but they allow light to pass through from above onto a standard flat solar cell. The plan is for Panasonic to produce the solar cells and for Tesla to put together the glass tiles and everything that goes along with them. That's all predicated on shareholders approving the $2.2 billion acquisition of SolarCity, the biggest U.S. rooftop installer, on Nov. 17.

Tesla SolarCity Solar Roof Panels

Tesla says the tempered glass is "tough as steel," and can weather a lifetime of abuse from the elements. It can also be fitted with heating elements to melt snow in colder climates. "It's never going to wear out," Musk said, "It's made of quartz. It has a quasi-infinite lifetime."

In a Q&A with reporters after the presentation, Musk said the tiles are comparable to competing high-efficiency solar panels. The current prototypes that Tesla engineers are working with reduce the efficiency of the underlying solar cell by just 2 percent. With further refinement, Musk said he hopes the microscopic louvers responsible for making the tiles appear opaque can be used to actually boost the efficiency of standard photovoltaic cells.

Tesla SolarCity Solar Roof Panels

This, apparently, is a solar roof.

Putting the pieces together.

The vision presented at Universal Studios in Los Angeles is the grand unification of Musk's clean-energy ambitions. The audience was able to step into a future powered entirely by Tesla: a house topped with sculpted Tuscan solar tiles, where night-time electricity is stored in two sleek wall-hung Powerwall batteries, and where a Model 3 prototype electric car sits parked out front within reach of the home's car charger.

Attracting less attention on Wisteria Lane was Tesla's Powerwall 2, a major upgrade of its home battery for electricity storage. When the original Powerwall was released last year, I was skeptical. Mostly, it was just too pricey for the amount of power it provided, especially in the U.S. where electricity is cheap and most people can sell their excess solar power back to the grid. Version 2 is a much different product. It packs more than twice the capacity-14 kilowatt hours versus 6.4 kilowatt hours-for less than half the price after installation. 1 It includes a built-in Tesla-brand inverter and comes with a ten year, infinite-cycle warranty.

Tesla SolarCity Solar Roof Panels Powerwall

More power to ya.

Electricity storage is crucial for future uptake of solar power. Already in some solar-heavy regions, more electricity is being produced during the middle of the day than people can consume, and utility prices spike in the evening hours when the sun goes down. In the U.S., some states are abandoning payments for daytime rooftop solar, undermining huge investments that families have made in their solar systems. The only recourse is for customers to use that electricity themselves, at night.

Like previous attempts at solar shingles, the solar-plus-battery package hasn't really caught on yet. SolarCity's total bundled sales thus far number in just the hundreds. But an argument can be made that the products just weren't compelling enough yet and the prices were still too high.

The Powerwall 2 may be the cheapest lithium ion battery for the home ever made when deliveries start in January. Tesla is selling the batteries at retail prices that are cheaper than the average manufacturing cost at most companies, according to data compiled by Bloomberg New Energy Finance. We "certainly expect it will move the market prices downwards as we saw last year with the first Powerwall," said Yayoi Sekine, a BNEF analyst who covers battery technology.

"The future is going to overwhelmingly be solar plus battery," Musk said. "They go together like peanut butter and jelly."

Tesla SolarCity Solar Roof Panels Powerwall

Let's wait and see

Powerwall 2 looks ready for primetime. The new solar shingles? Let's wait until more details emerge. Tesla says we should expect a slow initial rollout beginning in about nine months. Within two years of production, the shingles could account for five percent of the five million roofs installed in the U.S. every year, said Peter Rive, SolarCity's co-founder and chief technology officer. SolarCity, under the Tesla brand, would also continue to sell surface-mounted solar panels for homeowners who have no plans for replacing their existing roofs.

The pricing on the new solar roof is a bit-squishy. Musk said that someone who buys a Tesla roof will save money compared with someone who buys a comparable traditional roof plus electricity from the grid. But make no mistake: This will be a premium product, at least when it first rolls out. The terra cotta and slate roofs Tesla mimicked are among the most expensive roofing materials on the market. SolarCity CEO Lyndon Rive noted that the price of a conventional roof can vary widely, from $7,000 to $70,000-based on materials, size, complexity, location-so giving out firm prices of a solar roof at this point would be difficult.

Telsa will release more financial information about the SolarCity deal this week before it goes to shareholders for a vote. If all of Musk's plans come true, by the end of next year you'll be able to walk into a Tesla store, buy a Model 3 electric car, a slate-glass solar roof, and a Powerwall 2 to manage the flow of all those electrons in your life. There are a lot of details to be hammered out until we know for certain whether Musk's vision for a grand unification will become more than just a great television backdrop. But these tiles, viewed up close, are definitely worth tuning in for.

Tesla SolarCity Solar Roof Panels Powerwall

The 2017 trifecta: Solar roof, Powerwall 2, Model 3.


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