Electricity bills has been increasing every year, and is there any solution to reduce this?
→the answer is yes! and Tesla seems have interesting solution. 

Electric vehicle venture company Tesla, maybe I should say it used to be “venture” has finally begun selling home storage batteries in the world. I had an opportunity to talk with a person in charge of Tesla at the exhibition of storage batteries at Tokyo electric products event the other day, so I will share the information that I heard from Tesla sales person.
Tesla announced the first Powerwall in 2015 and has a track record in Europe and the United States, but this time the model sold in the world today is the second generation. (2020/April).

so WHAT IS POWERWALL?

The Powerwall is intended to be used for home energy storage and stores electricity for solar self-consumption, time of use load shifting, backup power, and off-the-grid use.
I have no idea what does this mean. so in the other word, you can charge the electricity during the day from the solar panel or cheap electricity. (depending on countries) so its bigger version of battery. so if you can get the electricity you can get your giant battery(Tesla powerwall)

 

WHY DO WE NEED?

“Home storage batteries can be used in combination with solar power to store excess power. By storing the electricity generated by the sun during the day, even at night when electricity cannot be generated, You will be able to use the electricity generated at home.You can save the electricity bill by purchasing from the electric power company for the part that you do not have enough at night. 

Electric power is often cheap at night, so if you use the electricity provided by night power during peak power hours such as daytime, you can reduce the amount of power used during the day. This is called peak cut, which leads to a great saving in electricity bills. Furthermore, by using a combination of household storage batteries and photovoltaic power generation, the electricity storage system will be charged even in the event of a power outage, and power will be supplied to preset home appliances. Therefore, even when there is a power outage, electricity can be used day or night. Since it can be used as an emergency power source in the event of a power outage, it can be said to be safe even in the situation of natural disaster. ” So here is example.

Example of AUSTRALIA natural disaster

“In 2016, there was a storm in South Australia that caused the destruction of transmission towers, which caused South Australia to experience a complete power outage. Tesla offered to help with the construction, and Tesla built a lithium-ion storage system in South Australia in 2017. After that, the electricity supply started on December 1, 2017. The power pack of the electricity storage system constructed in South Australia was said to be three times more powerful, and it was capable of supplying 30,000 units of electricity for one hour. The result is a big change in the electricity market data.

Just four months after Tesla started operating the electricity storage system, the electricity supply service charges in the airspace dropped by 90%. And Tesla’s energy storage system accounted for over 55% of South Australia’s electricity-related revenues. The Australian Government has invested A $ 90 million ($ 1 (AUD) = $ 0.70) in Tesla’s electricity storage system. However, it was said that this investment was meaningful, as it had an amazing result in just four months. The success of Tesla’s electricity storage system in South Australia is expected to lead to a revolution in the world’s electricity system. ”

WHY TESLA? There are many companies have battery storage?
Yes, there are some companies but I am going to write about why Tesla’s got some advantages.

• Features of Tesla storage battery
  100% self-power is a feature of Power Wall. The combination of solar energy and a power wall will allow self-generated electricity to cover all household electricity. Powerwall, which aims to generate more electricity than solar panels use at home during the day, stores its surplus electricity to provide power to homes even after sunset. In addition, the solar energy supplies electricity to the home and continues to charge the power wall even when there is a power outage.

In the situation of a power outage, the power wall disconnects from the utility grid and restores power to your home in a fraction of a second. The speed recovery will be performed and it will not be bothered even during a power outage. Not only that, you won’t even notice that a power outage has occurred. Also, by using a solar power generation system and a power wall together, solar energy will be supplied to the home and continue to charge the power wall. If only solar power is generated, the solar power generation system will not operate even during a power outage. In addition, up to 10 power walls can be connected. Since more electricity can be stored, it can be used with peace of mind even in households that use a lot of electricity. ”

• Advantages of Tesla’s storage battery 1: Large capacity
  “The biggest merit of Tesla’s household storage battery is the large capacity. The characteristic of Tesla’s power wall is 13.5kWh, which is quite large. However, this is very different from the capacity of a storage battery such as that built in a mobile phone or laptop computer.If there is 13.5kWh, the power of 2LDK for a full day will be used. Is stored.

The power wall, which has twice the energy density of the first generation power wall, is amazed by the difference in its capacity compared to the capacity of household batteries of other manufacturers. Since the capacity of other manufacturers is generally 5.0 to 7.8kWh, it can be said that the capacity is more than double. Furthermore, since up to 10 units can be connected, it can be increased up to 135kWh. The power wall is also characterized by its compact size and its large capacity. The size is 1150mm × 755mm × 155mm, and the total weight is 120kg, so there is no need to worry about the installation location. ”

• Tesla’s storage battery advantage 2: low price
  “The price of Tesla’s household storage battery is also cheap. It is said that the power wall that has excellent performance and low price is priced at 825,000 yen per unit. This is The price of a storage battery for home use is about 900,000 to 1.6 million yen, and the average price per 1kWh is about 200,000 yen. Considering the above, it can be said that a storage battery that costs less than 100,000 yen per 1kW is rare, and it can be said that many general household storage batteries have a small capacity. Considering the installation of, there will be a difference of nearly 2 million yen.

It goes without saying that it has more functionality and capacity than the price. Another feature of Tesla’s storage batteries is the low cost of introduction. The electric power generated by a typical solar power generation system is DC, but AC can be used at home. Therefore, even if electricity is generated by sunlight, it is necessary to switch from direct current to alternating current. An inverter is required to switch from direct current to alternating current, and a typical solar power generation system must have an inverter separately. In that respect, the power wall of Tesla has an inverter built in. Therefore, there is no need to purchase an inverter separately and the initial cost can be suppressed. ”

• Advantages of Tesla’s storage battery 3: Easy to install
  “The third advantage of Tesla’s household storage batteries is that they are easy to install. Most household storage batteries are placed on the floor, and many products do not have a good design appearance. On the other hand, Tesla’s household storage battery has a simple design that is easy to take in. In addition, there are two types of power wall installation methods, floor installation and wall hanging, so you can install it as you like. By mounting it on the wall, you can keep the house looking neat. Up to 10 units can be connected and used, regardless of whether it is indoors or outdoors It can be installed freely.

Also, even if you choose to hang it on the wall, it will be attractive that it can be easily installed by simple construction. However, since it weighs as much as 120 kg, it is safe to reinforce it in the case of a wooden house. Installation on the floor does not require installation work, so installation is extremely easy. In addition, the power wall is compact and does not take up much space for installation. There are a wide variety of colors, and you can choose from 6 colors: white, dark red, navy blue, gray, and light purple. Considering the color balance with the building, you can choose the power wall that suits you best. ”

• Advantages of Tesla’s storage battery 4: Excellent app
  One of the merits of Tesla’s household storage battery is that it can be widely used by connecting with an application. This app can be used by linking a power wall with a smartphone along with Tesla’s solar power generation. You can check the amount of electricity used in the app. Even on days when the efficiency of power generation tends to decrease, such as on rainy days or cloudy days, you will be notified when you are preparing to supply power. You can check how much electricity you have used and how much electricity you are generating even when you are out. This app gives you access to not only powerwalls, but also solar panels, Tesla’s power generation systems such as Model S and Model X at once. It can be said that it is very convenient because it can be automatically managed by using the application.

• Tesla’s storage battery advantage 5: high durability
  The fifth advantage of Tesla’s household storage battery is its high durability. Storage batteries, which are often installed outdoors, may be susceptible to dust and rainwater depending on the installation location. However, Tesla’s household storage battery has a waterproof and dustproof structure, so it can be installed safely not only indoors but also outdoors. In addition, household storage batteries have a risk of electrical leakage because they are facilities that store electricity, but since we are fully prepared to prevent electrical leakage, you will not get an electric shock even if you touch them with bare hands. Furthermore, since there is no heat exhaust port or exposed wiring on the outside, it can be said that it is safe even with small children. In addition, Tesla’s household storage battery is covered for 10 years, so you can get solid support in case of a failure.

Why is a Tesla battery cheap?

The reason why Tesla’s household storage batteries are cheaper than ordinary batteries is because of how they are sold. The storage battery that Tesla sells uses a sales method called the direct sales model. This is known as the selling method adopted by Dell, which is known for personal computers. The direct sales model is characterized in that the seller and the consumer are directly connected to sell. Since the wholesaler does not pass between the distributor and the consumer, no margin is generated by the intermediary. It’s the cheapest way for consumers to buy because they only need to consider the profits of the seller.

Why storage batteries should be installed with solar power?
“It is said that household storage batteries should be used in combination with solar power generation instead of just using them. One of the advantages of combining household storage batteries and solar power generation is the saving of electricity bills. If you use a household storage battery in a home without solar power generation, you will need electricity to charge the storage battery, resulting in high electricity charges. It can be said that it is highly effective when used as a supplementary role to store the surplus power of.

In addition, solar power generation cannot generate enough power without a certain amount of sunlight. You can use the electricity generated by the solar power generation system during the daytime, but you need to purchase electricity from the power company after the sun sets or in bad weather. However, by having a household storage battery, you can generate power during the day and save the rest of the power used for the night or in bad weather. Since few households use a lot of electricity at bedtime, there is a high possibility that the electricity generated during the daytime and the remaining electricity used will be sufficient. Furthermore, even if you purchase an insufficient amount of electricity from an electric company, the charge for late-night electricity is cheaper than during the daytime, so you can say that you can control the electricity bill.

If you want to make good use of late-night electricity, you can also use it by purchasing solar power from surplus electricity generated by solar power in the daytime and purchasing electricity from a power company in the middle of the night.This is a method of using electricity purchased from an electric company in the middle of the night and accumulating it in a storage battery in the morning and evening when the power generation is low. By adding storage batteries and solar power generation together, it can be said that you can control the sale and purchase of electricity. However, please note that solar power generation and storage battery use double power generation.

Double power generation means using both photovoltaic power generation and other power generation equipment. The storage battery is also regarded as a power generator, so double power generation will result. The purchase price of electricity generated by double generation of solar power will be cheap. Even if the amount of power sold increases, the purchase price will drop and it may not be possible to generate income. Although Tesla’s domestic electricity storage is cheaper than other manufacturers’ products, it costs a certain amount to install a storage battery, so let’s use it effectively. 

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◾️ Tesla powerwall specs details

-Only a model with a storage capacity of 13.5kWh is a large-capacity storage battery for home use.
The external dimensions are 1150 x 755 x 155 mm, the weight is 114 kg, and it is a built-in power conditioner type.
-The installation method supports both floor mounting and wall hangings, and when installing multiple units, it is possible to expand up to 10 units, 135kWh
-The operating range temperature is -20 to 50 ° C.

The difference between the original Powerwall and the current Powerwall 2 is only the appearance is changed, and there is no particular change in the specifications.

Although there was a notice about the sale of this storage battery from before, it was undecided when the specific time was. However, we finally started accepting applications from April 2020. The specifications of this storage battery are very interesting for users who are considering installing storage batteries. I think the reason why it’s attractive because of its large capacity and stylish appearance, and its low price, but since the features are summarized below, please refer to it.

Installing Price in Japan
Features 1. Body price below 1 million yen
 * Battery body is 825,000 yen, communication system is 165,000 yen
If you refer to the total amount of money including installation work on HP, it will be as follows.
Total body price 990,000 yen (excluding tax) Tax included (10%) ① 1,089,000 yen Construction cost is 400,000 to 550,000 yen * Wall reinforcement construction is separately Average construction cost including tax ② 522,500 yen Shipping cost ③ 20,000 yen
The total of ①②③ is 1,631,500 yen. (2020/5)

Installing Price in Australia
The total cost of the Tesla Powerwall 2 will be around $ 14,000.This cost includes $ 10,000 for the unit, $ 1,700 for supporting hardware and between $ 1,150 and $ 2,900 for installation, depending on the location and installer. (2020/5)

Installing Price in USA
Tesla lists the Powerwall at a cost of $ 6,500 alone, and puts supporting hardware costs at $ 1,100, bringing the price of just the Powerwall and its associated components to $ 7,600 before installation. (2020/MAY)

◼️ What is the life and cycle number of a Tesla battery?
Depending on the manufacturer, the number of cycles of the storage battery may be displayed, but in the case of Tesla it is not disclosed. Unfortunately, even if I asked the person in charge, I could not announce it. However, the warranty guarantees 80% capacity in 10 years, so please use this as a guide.
Typical storage battery life is 6000 cycles
If you use one cycle a day, it will last about 16 years.
Recently, there are also 12000 cycle storage batteries, so
Depending on how it is used, it has a long service life and will continue to produce economic effects for a long time. The length of years of use is directly linked to cost efficiency, so it is a matter of concern.

Check here too! Precautions for construction!
Those who are considering indoor installation should be careful.

• Outer dimensions are 1150 x 755 x 155 mm
  Tesla is basically wall mounted, so if it is a wooden construction instead of a concrete wall, it will be necessary to strengthen the wall separately. In that case, the cost may be high and the initial cost may be added.
• The weight of the main body is 114 kg. The installation method supports floor mounting and wall hangings, but it is recommended that wooden Japanese houses be placed on the floor after a simple foundation work. It can be placed on the floor as explained above, but it is not recommended considering the risk of falling due to an earthquake. When it comes to safety and cost-effectiveness, outdoor installation is practical after all.
  If it is installed outdoors, it has a smart appearance, so there is a danger of it falling over if it is placed directly to stabilize it. To prevent this, a fall prevention metal fitting is required, which is expensive.
  
  

From here on the enforcement of Japan’s power wall
Tesla storage battery is not subject to subsidies
At this stage, it does not have JET certification *, but it seems that sales will start from April in advance. Please note that storage batteries that are not JET certified are not eligible for subsidies from local governments.

• “JET parts certification service”
  Regarding the lithium-ion storage battery (single battery), the conformity (test) with the applicable items of Technical Standard Appendix Table 9
  Confirm and certify the factory quality control system (plant survey).
  In addition to displaying the JET parts certification mark (*) on certified cells,
  When mounted on an assembled battery, it has been confirmed that it meets the technical standards for single cells.
  By omitting the test, the test charge for the battery pack and the test period can be shortened. (The added value of the battery improves.)

• “S-JET certification service”
  Regarding lithium-ion storage batteries (battery packs), we confirm and certify conformity (test) to the technical standard Appendix 9 and factory quality control system (plant survey).
  By displaying the S-JET mark on the certified battery, consumers and distributors etc.
  We can publicize that a third-party certification body has confirmed conformity to technical standards and maintenance of quality.
  The S-JET certification mark is used in addition to ensuring safety by manufacturers.
  By displaying the S-JET certification mark, it can be shown that the conformity to the test standard has been objectively and fairly proved