What is home solar battery storage?
In a nutshell, home battery storage, or a solar battery, allows you to store electricity for use at a later time. Learn more about energy storage batteries. Many UK homes have solar PV panels which generate electricity during daylight. By adding a battery to the system, you can now use this energy in the evenings and:
- Reduce your energy bills by using your own generation even when the sun sets
- Save by charging on cheap overnight electricity and using the battery during the expensive hours, if you’re on a time of use tariff, such as Economy 7, and
- Earn money when you join our Grid Services.
And it’s good to know that when you add a battery to your solar PV any existing feed-in-tariff or Smart Export Guarantee payments are unaffected.
Why buy home battery storage from us?
We've teamed up with Powervault to link the home battery storage to EDF Grid Services. This means that as well as storing your solar energy for use later in the day, you can also support the UK's 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 feed-in tariff or energy customer to buy the solar battery from us. You could also choose to pay in monthly instalments and enjoy your solar battery from just £66 a month. Our price is all-inclusive:
- Battery with 10 year warranty
- Standard installation, done in a day
- EDF Grid Services
- Powervault Portal to view your energy generation, storage and use in real time.
What are EDF Grid Services?
Our Grid Services let you earn more from your solar battery. We'll pay you every year for ten years for occasional access to your battery to help support the growth of renewable energy on the grid.
Being UK’s biggest generator of low-carbon electricity, we're working towards a low-carbon future. To become a Net Zero society we need to increase our renewable energy generation and reduce our carbon emissions. As renewable generation is intermittent, the energy system needs help to maintain the frequency and voltage balance. This is where batteries come in. As well as investing in large scale, low carbon generation and energy storage, we're building a network of small-scale batteries, which help balance the grid. We pay you an annual amount to occasionally use your battery.
Why choose a Powervault 3 for your home battery storage?
Our solar battery experts have specifically chosen the Powervault 3 battery.
It comes with a built-in hybrid solar inverter which can replace your old one now or be ready for switch over when your original inverter fails, saving you the cost of a new one.
It's available in a wide range of capacities to suit your needs and it’s modular so you can add more capacity later.
It's compatible with all solar PV systems abd can be fitted to existing or new installations.
It's future-proofed – future functionality such as EV charging can be downloaded remotely so it continues to support your personal journey to net carbon zero.
How much does the Powervault 3 solar battery cost?
We offer two sizes of Powervault 3 which are suitable for most homes – 4kWh and 8kWh. You can choose with or without the Grid Services. The annual payments only come with the Grid Services packages. If you were to buy 8kWh battery with Grid Services, you'd receive equivalent to £1000 off the price.
| With Grid Services | Without Grid Services | |||
|---|---|---|---|---|
| Battery capacity | 4kWh | 8kWh | 4kWh | 8kWh |
| Price inc. VAT | £5,599 | £7,999 | £5,599 | £7,999 |
| Battery with 10 year warranty |  | | | |
| Standard installation |  | | | |
| Powervault portal | | | | |
| Hybrid solar inverter | | | | |
Grid Services income (split into ten annual payments) | £500 | £1000 |  | |
| Buy Powervault 3 with Grid Services | Buy Powervault 3 without Grid Services | |||
It's possible to upgrade to larger systems, find out the prices in the Ts&Cs document. If you're unsure which battery size to choose, get in touch for one of our experts to help you out.
Ways you can pay for your solar battery
Review your payments and APR using our loans calculator
Illustrations of spreading your costs over 12 months and 120 months
4kWh battery with our 9.9% credit offer spread over 120 months:
| Price of battery | £5,599 |
| Cash price | £5,599 |
| Deposit | £500 |
| Balance of payments | £5,099 |
| Duration of agreement | 120 months |
| 120 monthly payments | £65.91 |
| Annual rate of interest (fixed) | 9.9%p.a. |
| Representative APR | 9.9% APR |
| Total amount payable | £7,909.20 |
4kWh battery with our 0% credit offer spread over 12 months:
| Price of battery | £5,599 |
| Cash price | £5,599 |
| Deposit | £500 |
| Balance of payments | £5,099 |
| Duration of agreement | 12 months |
| 12 monthly payments | £424.92 |
| Annual rate of interest (fixed) | 0.0% p.a. |
| Representative APR | 0.0% APR |
| Total amount payable | £5,599 |
How much could I save with the Powervault 3?
The savings will depend on many things such as the size of your PV system and your home's energy use. The solar battery system is very flexible and you can set a schedule to suit your energy use pattern. As an example, this illustration shows a four-bedroom family house in South East England, with a south-facing 2.4kWp solar PV system, 4kWh Powervault 3 battery, and an E7 electricity tariff.
Day 1 - The house is powered by solar generation during the day any excess is used to fill the battery first. Any remaining energy is then exported to the grid. The house then runs off the battery in the evening. On this particular day, it used its own electricity until 3am, when it switched to the grid.
Day 2 - The battery is topped up with one hour of cheap overnight grid electricity, which is then used to power the house in the morning instead of using peak rate electricity from the grid. During the day the house runs off the solar, putting any excess into the battery, which is then used in the evening.
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!
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.
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.
Battery storage for your business
Businesses can generate additional revenues from energy flexibility services. If you install a commercial scale storage system, your business could save money by shifting energy use from high cost to low cost periods.