5 questions about the Tesla PowerWall
Tesla introduced its home battery. The Tesla PowerWall is a battery that hangs on the wall. What can we expect from this energy storage system?
1. What exactly Tesla made?
Tesla’s rechargeable battery is called the Power Wall. It is a Lithium-ion battery which can store energy for off-grid and supplemental power systems, including large facilities and the electric grid.
Also, if you use a lot of energy at night, you can use the battery for that. You can incorporate a lot of devices along with the PowerWall, and – of course – you can use the battery to charge your electric car. However, the battery of a Tesla Model S or Roadster is about 10 times larger than the home battery.
2. For who?
The Power Wall is primarily intended for households with solar panels. The PowerWall has a maximum capacity of 2kW (with a peak of 3 kW). The device is mainly intended for houses, but Tesla introduced also a version for companies: the Power Pack. The batteries’ modular design is adapted from the technology used in those for Tesla’s electric cars.
The Powerpack industrial unit is a cabinet-and-rack system which can theoretically be expanded by filling the racks with additional 100kw-capacity units for up to 500kwh. Multiple units can be connected to create a capacity for ten megawatt hours.
3. What does the PowerWall look like?
There are different versions of the Power Wall. The difference lies mainly in the em capacity of the battery. The home version has a capacity of 7 kilowatt-hours, the large 10 kilowatt-hours.
The PowerWalls are nice designed devices. The battery is about a meter wide and 1.2 meters high, with a thickness of 15 centimeters. The unit weighs less than 100 kilograms. If you want to save more energy, you can connect multiple batteries together, up to nine!
4. What makes the battery so revolutionary?
Currently, green power is still in its infancy. It’s hard to get your house 100% energy neutral right now. Especially when solar panels are not working (eg overnight), you’re still dependent on other energy sources – these are often polluting fossil fuels. A battery of 7kW will not help to make a home 100% effective, but it is good step in the right direction.
Moreover, Tesla is working hard to improve the battery. There is a big chance that we will have batteries with much more capacity within a few years.
5. What about the costs?
The PowerWalls still are only available in the USA. The cheap PowerWall costs $ 3000. The more expensive version is $ 3.500.
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