Compare Solar Batteries like the Tesla Powerwall 2 to Reduce Your Energy Bills
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Last updated: 01 June 2022

Reduce Your Energy Bills with a Tesla Powerwall in the UK

What is a Tesla Powerwall?

The Tesla Powerwall is a rechargeable lithium-ion solar battery. As well as being able to store solar panel generated energy, you can also charge this battery with any electricity source if need be. It can detect outages and automatically become your home’s energy source, meaning you’ll never have to worry about unexpectedly losing power again.

What more, the Tesla Powerwall has one of the highest energy capacities when compared to other solar batteries on the UK market. Tesla is known for producing both quality and beautifully designed products. This is why the Tesla Powerwall is the most widely-installed battery backup in homes.

The first model of the Powerwall came out in 2015 and has continued to be refined, with the creation of the Powerwall 2 and the Powerwall+. The Powerwall 2 originally came out in October 2016 and was updated in November 2020. The Powerwall+, introduced in April 2021, is a combination of the Powerwall 2, a Backup Gateway and a solar inverter.

One of the main perks to the Tesla Powerwall is that it can reduce your energy bills and help save you money in the long term. This is because when you generate your own solar energy at home you become less reliant on the National Grid. As it reduces the amount of electricity you need to buy. On top of that, you can even see a return on your investment by selling your surplus energy, depending on your supplier.

Solar battery system costs typically range between £1,200 and £6,000 depending on their capacity, materials, and life cycle. In general, lithium-ion solar batteries are known to be the most cost-effective type of battery, due to their higher usable capacity and longer lifespan. However, the initial cost can be a pain.

If you want to reap the long-term benefits of solar batteries whilst also making sure you get the best deal for the upfront costs, then it’s a good idea to compare the prices of batteries available on the UK market. Click your region button below to see what your options are without any obligation or cost before making your decision.

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Tesla Powerwall 2 Specs: Capacity, Battery and Dimensions

The Tesla Powerwall 2 has a total capacity of 14 kWh and usable capacity of 13.5 kWh. It can deliver 5 kW of power continuously and 7 kW of peak power in short 10-second bursts. Furthermore, you can install up to 10 Powerwall units to maximise the amount of solar energy you can store in your home.

Later versions of the Powerwall 2, from November 2020, can deliver 5.8 kW continuously and 10 kW of peak power.

This makes it ideal for larger households or for those who want to run their car on solar energy. If you don’t require this much energy then a solar battery with a smaller capacity might be more suitable for your home.

Furthermore, the Tesla Powerwall’s dimensions are 1,150 x 753 x 147 mm and it can be either wall- or floor-mounted, making it easy to fit in with your home.

It has a warranty of 10 years for unlimited cycles and 80% of the original energy capacity (when it is charged using solar energy). This means you can have peace of mind knowing that you qualify for a replacement if your Powerwall falls below 80% of the original capacity within the first 10 years after installation.

Tesla pride themselves on creating quality products and the Powerwall has an average lifespan of about 20 years, so you can feel even more secure knowing that this solar battery is built to last.

We’ve summarised the Tesla Powerwall 2 specs in the table below:

  
Tesla Powerwall 2.0 Specifications
Total Capacity 14 kWh
Usable Capacity 13.5 kWh
Depth of Discharge 100%
Efficiency 90%
Power Oct. 2016: 7kW peak / 5kWcontinuous, Nov. 2020: 10kW peak / 5.8kW continuous
Warranty 10 years
Scalable Up to 10 Powerwalls
Operating Temperature -20°C to 50°C
Dimensions 1,150 x 753 x 147 mm
Weight 114 kgs
Installation Floor or wall mounted, indoor or outdoor, water and dust resistance
Certifications Meets local safety standards and regulations

Benefits of a Tesla Powerwall

If you’re thinking that a battery is an unnecessary component when it comes to installing solar panels you might want to reconsider. There are multiple ways you can benefit from installing a Tesla Powerwall. We’ve listed them below so you can stay informed and make sure you don’t miss out:

    • Become 100% energy-independent: You don’t need to rely on the National Grid or worry about power cuts since you can store your excess electricity. This is increasingly important as power outages become more regular due to more extreme weather.
    • Touch-safe: No exposed wires or vents, and no areas that will overheat. Therefore, there’s no need to worry about potential safety hazards for children or pets.
    • No maintenance required: The powerwall is an automated system so you can save money on maintenance.
    • Mobile phone app: Can track how much (or little) energy you are consuming. Furthermore, you can receive energy usage estimations and instant alerts for weather forecasts.
    • Increases property value: A complete solar installation is attractive for potential buyers as it adds actual monetary value to the property and helps save on energy bills.
    • Solar Energy UK’s research of more than five million properties found that a solar installation could increase value by £1,891 - £2,722.
    • Weatherproof: Can also be installed outside as it is able to withstand bad weather conditions.
    • Aesthetically-pleasing: Tesla is known for its beautiful and minimalistic design, and the battery can be either floor or wall-mounted. So, it should be an attractive addition to your home decor.
    • Easy installation: It has an inbuilt DC-AC inverter, making installation simple and less costly.
    • Enhance performance in any climate: The liquid thermal control system manages Powerwall’s internal temperature.

How Does a Powerwall Help You Reduce on Energy Costs?

Arguably the biggest benefit of them all is that the Tesla Powerwall can reduce your energy costs. Whether you still plan to use electricity from the grid or want to go completely solar, you can save money with a Tesla Powerwall either way:

    • Avoid paying the full price for electricity: Electricity is cheaper at night in the UK. This is because the least amount of electricity is taken from the grid during this time and so energy suppliers offer cheaper prices as a result. Therefore, if you need to use electricity you can charge your Tesla Powerwall during off-peak hours, saving you money.
    • Being environmentally friendly pays: You can greatly reduce or even completely eliminate your use of fossil fuels, and benefit from extensive and sustainable solar power. During the brightest parts of the day, your solar panels may actually generate more energy than you need.

This extra energy can be stored in your Tesla Powerwall and then be used on cloudy days or at night, meaning you won’t need electricity from the grid. It’s also even possible to sell your energy back to the grid, meaning you can get a return on your investment.

How Much Does a Tesla Powerwall Cost?

The demand for the Tesla Powerwall is high, meaning its initial cost can be a bit pricier compared to other solar batteries. However, this demand is high for good reason. When you take into account the Powerwall’s capacity, depth of discharge, and lifespan (alongside the other benefits mentioned above) it can end up being a more worthwhile investment.

Below we’ve summarised the approximate price of a Tesla Powerwall 2 in the UK:

  
Tesla Powerwall 2 Prices
Upfront Deposit £400
Supporting Hardware £1,400
Installation £900-£2,800
Total Cost (before installation) £9,390
Total Cost (with installation) £10,290-£12,190


Grants For the Tesla Powerwall

If you’re concerned about the initial price of the Tesla Powerwall, don’t worry as there are thankfully ways to cut the costs. In the UK, there are a few different solar panel grants you can look into.

Tesla Powerwall UK Grant

Firstly, there is the Smart Export Guarantee (SEG) where you can earn money by exporting your stored electricity to the National Grid. Export tariffs vary depending on your energy supplier, but 4-6p/kWh is considered to be a good rate. Check with your energy supplier if exporting your stored energy is possible, as you may be missing out on making money from your solar energy.

Secondly, the new VAT laws were introduced in the UK on the 1st April 2022. If you set up your solar battery system while installing your solar panels, you can secure VAT at 0% on the Powerwall and on the solar installation. It’s important to note that you need to install everything with the same installation company to benefit from the 0% VAT.

Thirdly, if you’re looking for solar energy grants in Scotland, there is the possibility of receiving the Home Energy Scotland Loan. You can get up to £6,000 and £5,000 interest-free when you install solar panels and batteries, respectively.

If the cost of installing a Tesla Powerwall or another solar battery is what’s stopping you from upgrading your home to be more environmentally friendly, then we recommend you research the best prices in your area. One way you can easily do this is by comparing quotes from several local installers. That way you can see your options without any obligation or cost before making your decision.

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FAQ

I want a Tesla Powerwall in the UK, is there a grant available?

Yes, there are solar panel funding opportunities in the UK. One scheme from the UK government is the Smart Export Guarantee (SEG). The SEG is an export tariff which sometimes covers stored solar energy depending on your supplier. Consult your licensee first to see if you qualify for this scheme.

For those who are thinking of getting solar panels in Scotland, the interest-free Home Energy Scotland Loan is also available. You can receive up to £5,000 for a solar battery storage system.

How much does a Tesla Powerwall 2 cost?

The total cost of a Tesla Powerwall 2 before installation is approximately £9,390 in the UK. Including installation the price is between £10,290 – £12,190. The Tesla Powerwall is considered to be relatively good value for money in terms of cost per kWh of storage.

Is it worth getting a Powerwall?

Yes, the Tesla Powerwall is worth it for UK homeowners who want to save money on their energy bills. As well as reducing your energy bills, you can also potentially earn money through exporting your energy back to the National Grid alongside other benefits.

How long will Powerwall last?

The average lifespan of the Tesla Powerwall is around 20 years. However, this depends on how much you use it. It’s also important to note that the warranty period is 10 years for unlimited cycles.

What are some good alternatives to the Tesla Powerwall?

The Enphase Energy IQ battery and LG Energy Solution RESU Prime are two popular alternatives to the Tesla Powerwall.

Some of the pros to the Enphase Energy IQ battery is that it uses the safer lithium iron phosphate (LFP) battery chemistry and that it comes in both 3- and 10-kWh sizes which can be mixed and matched based on your home’s energy needs.

One of the pros to the LG Energy Solution RESU Prime is that it's available in size 16 kWh which is large enough to cover most home's energy demands, and this can even be doubled if need be.

How much does a Powerwall 3 cost?

There is currently no price or release date for the Powerwall 3. However, it is speculated that it may be released between Spring 2022 and the end of the year.

Bronte McClelland
Written by Bronte McClelland , Copywriter

Brontë has been a Copywriter at GreenMatch since April 2022. She has a keen interest in sustainability, renewable energy, and climate justice, and stays up to date with the latest green-energy trends. Furthermore, she has gained several years of experience in research and analysis through her previous studies and work as a teacher. In her spare time, she enjoys volunteering for causes within the fields of sustainability, education, and healthcare.