While the oil companies struggle to maintain their environmentally disastrous stranglehold on the market and the planet, there are some very realistic technologies that threaten to disrupt the status quo. One of the most dangerous for the oil companies is the Tesla solar roof, an off-the-shelf consumer system of tempered glass tiles.

Last week, Tesla began accepting orders for the product and released pricing, which is comparable to normal asphalt roofing.

The system is a mix of active solar tiles and inactive simple glass tiles, and as the percentage varies, so does the eventual cost. A 35 percent mix would cost $21.85 per square foot, and according to Consumer Reports, the tiles need to be under $24.50 per square foot to compete with normal tiles.

That math doesn’t even take into account the energy savings over time, which should allow the tiles to pay for themselves. Tesla released a savings calculator when they announced sales, and they are also offering a lifetime warranty.

“We offer the best warranty in the industry—the lifetime of your house, or infinity, whichever comes first,” a Tesla rep told Inverse.

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