What is domestic battery storage?

In a nutshell, home battery storage allows you to store electricity for use at a later time. Many homes have solar PV panels installed which generate electricity during daylight. By adding a battery to the system this energy can be used later when the sun is no longer shining, rather than buying energy from the grid. If you’re on a time-of-use tariff such as Economy 7, you could save even more on your bills by charging on cheap overnight electricity. And your existing feed-in-tariff payments will stay unaffected.

Watch video: Home solar battery - Powervault 3

Why buy home battery storage from us?

We've teamed up with Powervault to link the home battery storage to EDF Energy grid services. This means that as well as storing your solar energy for use later in the day, you can also support the growth of renewables in the energy network by helping balance the grid. You can read more about it here. 

You don’t have to be an EDF Energy feed-in tariff or energy customer to buy your Powervault 3 solar battery from us. 

By choosing the Powervault 3 battery with EDF Energy grid services you'll also get an exclusive discount of £1,600 on a 4kWh package or £2,000 on a 8kWh one. Our price is all-inclusive:

  • Battery

  • Standard installation

  • Grid services

  • Powervault Portal to view your savings wherever you are. 

Find out about different payment options.

Why choose a Powervault 3 for your home battery storage?

The Powervault 3 is compatible with all solar PV systems and lets you use more of your solar generation when you need it. It's not limited to just daylight hours, saving you more on your energy bills. It comes with a hybrid solar inverter, which can replace your old one now or be ready for switch over when your old one fails, saving you the replacement cost of that too. 

Which package is right for me?

We offer the Powervault 3 home battery storage with and without the EDF Energy grid services.

Right now, when the electricity grid runs short of capacity during peak periods, extra power can be generated but usually not in the cleanest or greenest way. Conversely, when there's excess renewable generation, demand can't be increased, which leads to wasted energy.

This is why we're building a network of small-scale batteries to help balance the peaks and troughs of energy production and customer demand for energy. In return for helping balance the grid for ten years, we’re offering a substantial upfront discount off the retail price of the battery. On an 8kWh battery its equivalent to receiving £200 per year for the ten year grid services package. You can read more on grid services here. There's also an option to purchase Powervault 3 at full retail price and opt out of the grid services. 

We offer a finance option to help you spread the cost of your solar battery or even other home improvements(1). Find out more. 

 With Grid ServicesWithout Grid Services
Battery capacity4.1kWh8.2kWh4.1kWh8.2kWh
Price inc. VAT, installation package & discounts where appropriate£3,999£5,999£5,599£7,999

Grid services discount

 £1,600£2,000
Standard installation included
Personal usage tracker
Personal usage tracker
Hybrid solar inverter included
10 year warranty
10 year grid services
 Buy Powervault 3 with Grid ServicesBuy Powervault 3 without Grid Services

Need help? Contact us

If you're not sure which option is best for you, we'll be more than happy to discuss your requirements and guide you through the process. Our Tech Team are very knowledgeable and will help you decide. They're a busy team so to save you waiting on the phone, please fill out the contact form below, including best day and time to contact you and they'll give you a shout!

Contact Tech Team

More technical information

There's a lot more information about our Powervault 3 home battery storage, including dimensions and weight. You can also read more about grid services. 

Technical info

How do I get a Powervault 3 solar battery?

Step 1

Choose your package, pay deposit or the full amount online. We also offer personal loans(1), if you wish to spread the payments. Alternatively, leave your details and we'll call you. 

Step 2

We'll contact you to confirm installation details and take balance payment if required. The installation will normally happen within four to eight weeks.

Step 3

A standard installation should take just a few hours. 

Buy Powervault 3

Power your daily life with your new solar battery

Store your excess solar energy for when you need to use it - not just during daylight hours. 

Charge on cheap overnight electricity if you're on a time of use tariff, such as Economy 7.

Save money on your energy bill and continue to receive your feed-in tariff payments as before.

Help balance the grid via our grid services.

Your questions answered

Who can I talk to about technical details?

Our Tech Team are on hand to talk through technical details and answer your questions. You can request a call back from them by filling in this short form. 

Do I have to be an EDF Energy feed-in tariff customer to buy Powervault 3

You don’t have to be an EDF Energy customer at all. As long as you’ve got solar PV installed you can benefit from our solar battery. 

Is this a time-limited offer?

Although there's no closing date for the discounted offer, we can remove it at any time.

Who will install my battery and how long does it take?

Powervault 3 expert installers will do all the work. A standard installation usually takes a few hours. If you have specific needs then our experts will discuss these with you and if there are any additional works required they will confirm the cost ahead of final payment.

What’s a suitable location for the Powervault 3?

The Powervault 3 can be installed in most internal locations, such as garage, utility room, basement or under the stairs. It's not suitable for external locations and we don't recommend installation in loft spaces. Powervault 3 will be floor mounted and fixed to the wall for stability. The physical dimensions are listed in the technical specification. An additional 10cm is required on all sides for access. Your Powervault 3 will need to be connected to the internet at all times. See the Standard Installation section of the Ts&Cs for more details.

Will I see any change to my energy bill?

If you currently export excess solar generation you will be able to store this for use later when the sun is not shining. This in turn will reduce the amount of energy you draw from the grid and, therefore, reduce your electricity bill. If you have Economy7 tariff, you can charge up your Powervault 3 on cheap overnight rate electricity and use it during the higher rate hours. How much you save on your energy bill will depend on your individual solar PV system and energy usage pattern.

Will I notice anything different when EDF Energy is accessing my battery for grid services?

You may notice the battery charging when the sun isn’t shining or discharging when your house is not consuming a lot of electricity. 

What's included in the package?

We offer two sizes of installation - Standard & Large.
Both include:

  • 4kWh or 8kWh battery - as chosen by you,
  • Remote survey using information and pictures of the site you send us,
  • Full installation and commissioning, including registration on the Powervault 3 customer portal,
  • Testing and confirming Powervault 3 is operating in line with its technical specifications,
  • Demonstration of your battery and customer portal.

Installation is available in mainland UK and Isle of Wight. We currently don't install in Scottish Highlands and Islands, Northern Ireland, Channel Island, Isle of Man or Isles of Scilly. 

For deliveries to more remote locations, site visits prior to installation or more complicated installations we'll charge the additional costs we incur. You can see more details in the Installation section of the Ts&Cs.

What are the general installation requirements?

Here are the general Powervault 3 location requirements: 

  • Need to be indoors: utility room, hallway, garage, or basement. We don't recommend installation in the loft or high humidity spaces.
  • Floor/wall must withstand the weight of Powervault 3.
  • The physical dimensions are listed in the technical specification. An additional 10cm is required on all sides for access.
  • Easily accessible and should not involve any clearing, tidying or work that involves the unreasonable preparation of the location for installation. Check the dimensions of the Powervault 3 to ensure it will fit in your desired location and permit air flow to/from the chassis. Nothing should cover or seal the air grilles.
  • The location must have an accessible internet supply, which Powervault 3 can connect to via Ethernet, Powerline or Wi-Fi.

If extra work is required, you’ll be quoted for these ahead of your final payment.

If you have a query about these installation requirements or are unsure about the suitability of your home, please leave your details on the call back form and we will be in touch to discuss your specific requirements.

Will I need a site survey?

A remote, off-site survey using information and images you email us is included in the installation. If, for whatever reason, we can't establish the extent of the works required to install the Powervault 3 system, we may need to send an installer to do a survey in person, for which we may need to charge extra. The costs are detailed in the Installation part of the Ts&Cs. 

Does installing a battery affect my feed-in tariff payments?

No. You continue to receive your feed-in tariff payments in full.

What are the dimensions of the batteries?

The 4.1kWh battery is: H90cm x W98cm x D25cm.

And the 8.2kWh battery is: H120cm x W98cm x D: 25cm.

An additional 10cm is required on all sides for access.

Do I have to replace my existing inverter now?

No. The Powervault 3 can be installed in different configurations either replacing your old inverter now, or leaving the new one ready for when your old one fails. Switching to the new inverter later will involve a small amount of work from a qualified electrician (and associated cost), but save you the cost of the new inverter later. Our Tech Team will talk you through the options.

I’m not currently on a E7 meter or tariff, can I switch?

You need to talk to your energy supplier as there are regulations about switching to E7 meters. Even if you are not on E7, you should still be able to make substantial savings by storing your solar generation for use later in the day.

I have a smart meter, does this have any impact on installation of a battery?

Having a smart meter doesn’t have any impact on the installation of the battery itself. OFGEM have also confirmed that customers with solar PV + battery + smart meter would receive deemed export feed-in-tariff payments. They are in the process of updating their published guidance on this matter. Talk to your feed-in-tariff provider if you have more questions about this matter.

Does the Powervault 3 battery storage have warranty?

Yes, Powervault 3 battery storage comes with a full warranty. You can view and download it here. 

How do I pay for my battery storage?

You can pay the deposit or full amount through our secure website. 

If you prefer to spread the payments for your solar battery, additional works or any other purchase, we also offer personal loans over longer periods(1). You can find out more here. 

Talk to an expert

If you have any other questions about Powervault 3 or installation requirements, please complete the call-back form below and our Tech Team will call you back. Please note they're unable to advise you on anything to do with your EDF Energy account or tariffs. 

All questions must be answered, unless marked (optional)

Battery storage for your business

Are you looking for battery storage for your business? You can find out more here about commercial storage solutions and contact us for further information.