Tesla Powerwall: Is It Worth Buying?

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Telsa’s Powerwall 2 is a rechargeable lithium-ion battery stationary energy storage used to store energy for the home, i.e., electricity from solar panels. This energy can be used as backup power or off the grid usage when needed. 

There’s also a bigger one for commercial usage that’s also used for things like load shifting, peak shaving, regulating frequency, controlling voltage, renewable power, and backup power. It also includes a way to monitor the energy you use in the home or business, that way you can monitor how much the house produces as well as how much it uses and make your plans accordingly.

History of Telsa’s Powerwall

The Powerwall came out in 2015, and at the time, two models were being planned. There was a ten-kilowatt version and a seven-kilowatt version. The first was for storage and backup, and the other was for daily usage. However, for some reason as of March 2016, the company removed any reference to the larger one from their website. As of October 2016, there were Telsa Powerwall batteries in eighteen countries, and that same month a new version came out called the Powerwall 2, which has a capacity of 13.5 kilowatts.

Advantages of Telsa’s Powerwall

The Telsa’s Powerwall stores the energy that solar panels have collected, yet isn’t used by the home. That means if for some reason you aren’t able to collect enough sunlight at some times of the year, the excess energy stored in your Powerwall battery will allow you to have power for your home or business still. Plus, after it is charged with as much energy as it can hold, any excess can be sent back to the electrical grid, and you could sell it back to the power company if desired.

Back in 2015, it was estimated that a home using the Telsa’s Powerwall along with solar panels would make their energy costs at around thirty cents per kilowatt if they stayed on the electrical grid. This could have different economic implications for those who were using it off the grid. 

However, at the time, US customers were spending 12.5 cents a kilowatt in some areas, so it may not save money for everyone. Yet, in some high-cost areas like Hawaii, where it was estimated it costs around 40 cents a kilowatt, it could save people money on their electricity. Plus, it was seen as valuable in other countries with high energy costs like Germany and Australia as well.

The Telsa’s Powerwall can be programmed to turn on automatically if your electrical grid should fail, and then you’d be running totally on battery power. You would still be collecting solar energy, though, as long as there is available sunshine at the time the grid failed, so the batteries would keep charging. However, the solar panels couldn’t send the energy back to the grid under these circumstances.

Because of this, installers are required to put in what’s called a gateway unit. This relays the energy from the system and keeps it from getting to the grid. Therefore any workers would stay safe from injury. The gateway unit automatically goes on under these circumstances. 

What does the Telsa Powerwall cost?

The Powerwall 2’s cost is nearly $15,000 for two of them, which is the recommended number for home-usage. Plus, it costs up to $4,500 to get them installed in the United States, not counting buying solar panels, which is an additional expense. It takes about 24 hours to install one at this time. Then on average, it takes around two hours to charge it via your solar panels.

There is a warranty available for the Tesla Powerwall. It is for ten years and covers it for up to 70 percent capacity, which means if it becomes unable to store at least 70 percent of its available storage capacity within 10 years, it is covered for the replacement.

Once charged, it will last around twelve hours depending on what you choose to run with it, i.e., it could run around 10 to 12 lights for that long, but considerably less if you tried to run your air conditioner with it.

All in all, Telsa’s Powerwall could be a good investment for some people or businesses. You have to do your homework and run the numbers and figure it out for yourself. Whatever you decide, it is a valuable tool in the search for environmentally friendly energy solutions for home and business.

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