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Unread 2015-09-19, 01:00 PM   #1
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Default Tesla unveils a battery to power your home, completely off grid

Tesla unveils a battery to power your home, completely off grid



CEO of Tesla Motors, Elon Musk, landed an official message unveiling the Powerwall, a battery designed to power your home. The message came at a convention center powered completely by renewable battery power.
The battery unit itself contains the same batteries present in the Tesla electric cars. The 7kWh unit will ship for $3,000, while the 10kWh unit will go for $3,500 (get the big one). They will store electricity from the grid or from solar and wind generators on site and if the grid goes down, they will continue to power your home indefinitely This feature makes them ideal for developing nations that are leap-frogging power grids completely.
Musk refers to it as changing the “entire energy infrastructure of the world.”

The batteries will begin shipping over the summer of 2015 and mount on the wall, looking like this



Something went wrong. Please make sure you added the video correctly.

Video URL: http://www.youtube.com/watch?v=KXWHqjQNJ5Y

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Video URL: http://www.youtube.com/watch?v=yKORsrlN-2k

“Powerwall is a home battery that charges using electricity generated from solar panels, or when utility rates are low, and powers your home in the evening. It also fortifies your home against power outages by providing a backup electricity supply. Automated, compact and simple to install, Powerwall offers independence from the utility grid and the security of an emergency backup.
Powerwall comes in 10 kWh weekly cycle and 7 kWh daily cycle models. Both are guaranteed for ten years and are sufficient to power most homes during peak evening hours. Multiple batteries may be installed together for homes with greater energy need, up to 90 kWh total for the 10 kWh battery and 63 kWh total for the 7 kWh battery.”
  • TechnologyWall mounted, rechargeable lithium ion battery with liquid thermal control.
  • Models10 kWh $3,500For backup applications7 kWh $3,000For daily cycle applications
  • Warranty10 years
  • Efficiency92% round-trip DC efficiency
  • Power2.0 kW continuous, 3.3 kW peak
  • Voltage350 – 450 volts
  • Current5.8 amp nominal, 8.6 amp peak output
  • CompatibilitySingle phase and three phase utility grid compatible.
  • Operating Temperature-4°F to 110°F / -20°C to 43°C
  • EnclosureRated for indoor and outdoor installation.
  • InstallationRequires installation by a trained electrician. DC-AC inverter not included.
  • Weight220 lbs / 100 kg
  • Dimensions51.2″ x 33.9″ x 7.1″
    1300 mm x 860 mm x 180 mm
  • CertificationNRTL listed to UL standards
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Unread 2017-05-10, 04:16 PM   #2
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Tesla releases details of its solar roof tiles: cheaper than regular roof with ‘infinity warranty’





Tesla released today all the information to order its new solar roof tiles products – starting with the smooth black glass tiles and the textured glass tiles, as reported earlier today.
Of course, the most important information that people were waiting for is price. CEO Elon Musk first hinted that it would be cheaper than a regular roof after accounting for energy savings, and later said that Tesla’s solar roof could cost less than a regular roof – even before energy production.
Tesla pretty much delivered on both depending on how you look at it.
The company says that the “typical homeowner can expect to pay $21.85 per square foot for a Solar Roof.”
What is important to understand is that not all tiles on the roof would be solar tiles. It depends on the energy needs of the household and shading coming from structural items such as dormers. For the house pictured above, all the tiles are from Tesla, but only some of them have solar cells in them that can generate electricity – though it’s not visible from street view.
The $21.85 per square foot price point was calculated for a roof where 35 percent of the tiles are solar (solar tiles cost more per square foot than non-solar tiles). During a conference call with journalists today, Musk said that in some cases, depending on the roofs, customers will be able to have up to 70% solar tiles, but in most cases, it will be about 40%.
They released a calculator directly on their website, which any homeowner in the US can use to get an estimate based on data from Google’s Sunroof project. Here’s an example for a home in Maryland with both 70% solar coverage and 40% solar coverage:






Ultimately, Tesla sees that most customers will essentially be paid to have a new roof, when accounting for energy generation and the solar incentive.
They are including an installed 14kWh Powerwall 2 in the quotes. It can be removed, but Tesla believes that most people will want to have the home battery pack for backup energy in case of an outage.
Tesla broke down the cost of both its solar tiles and non-solar tiles against traditional roof solutions.
The company estimates that its non-solar tiles are cheaper than regular tiles and its solar tiles are cheaper than anything else, but only when accounting for energy generation (actual cost of solar tiles is $42/sq-ft):
The value of Tesla’s solar roof is closely linked to its durability and its ability to generate electricity over decades.
Musk previously discussed the possibility of making the warranty last for the lifetime of the house on which it is installed and they actually did it:
“Made with tempered glass, Solar Roof tiles are more than three times stronger than standard roofing tiles. That’s why we offer the best warranty in the industry – the lifetime of your house, or infinity, whichever comes first.”
That’s for the tiles themselves. The solar power generation is guaranteed for 30 years, which is on the higher end in the solar panel industry:

During a conference call with journalists, Musk and Peter Rive reiterated their confidence in the new product’s durability, which ultimately, of course, is reflected in the warranty.
They put these through every test imaginable, including shooting a large ball of hail:

The first two tiles, smooth and textured, are going into production this summer. They decided to go with those tiles first because they received the highest number of inquiries.
A $1,000 USD deposit is required when ordering a system online now. Homeowners outside of the US can also order, but they should not expect installation until next year. Musk said that he expects strong demand and for the company to be production constrained on the tiles.
Tesla says that it will manage the entire “Solar Roof experience—from the removal of your existing roof through design, permitting, installation, operations and maintenance of the new Solar Roof.” The company estimates that the installation should take roughly the same time to install as a tile roof installation, which is typically 5-7 days.
They recently updated their mobile app in order to prepare for the integration of the solar products and the Powerwall.
Musk concluded the press call by saying: “When you think of a sustainable energy future, you want roofs to be beautiful and generate energy from the sun. That energy can then charge Powerwalls and electric vehicles. That’s the future we want.”
Tesla solar roof products are perfect for homeowners who want solar and need a new roof relatively soon, but a regular solar panel installation is still a good solution for people who don’t need a new roof. Solar and energy storage prices are highly dependent on your market (electricity cost, gov incentives, etc.) and your property. We suggest to get quotes from more than one installer to make sure you get the best energy solution for your place. UnderstandSolar is a great free service to link you to top-rated solar installers in your region for personalized solar estimates for free.
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Unread 2017-05-20, 02:42 AM   #3
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A $65,000 roof is a big upfront cost to make $15,000 over the course of 30 years. Especially when you can put a new normal roof on your house for 10% of that.
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Unread 2017-05-20, 06:29 PM   #4
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Or you could put regular panels on your roof for <20k and they protect your asphalt roof for decades.
Also easier to romove and service than solar shingles.
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Unread 2017-05-22, 09:32 AM   #5
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I would be curious as to what this would do to homeowners insurance. I would guess a big portion of the cost of HOI is the cost to repair or replace roofing. If these have a lifetime warranty, I wonder if we would see decent drops.
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