Reduce your reliance on the grid with a solar battery.
A home solar battery lets you capture and store excess electricity for backup and night time use.
Our solar batteries start from £3,995.
Upgrade your solar system and make the most of your excess electricity with a storage battery.
Sunsynk - £3,995
Sunsynk’s top-grade Lithium-Iron Phosphate batteries are scalable up to 32 times - a maximum of 170kWh per inverter. So, you can add multiple batteries to your system to store more electricity. Plus, the integrated Battery Management System optimises your battery's performance automatically.
No matter where you are, monitor energy generation, battery status, grid, load statistics, and change settings with the Sunsynk Connect mobile app.
- W 440mm x H 620mm x D 135mm
- 10 years manufacturer warranty
- 5.3kWh battery capacity
- 90% round trip efficiency
Tesla Powerwall 3 - £7,795
The Tesla Powerwall 3 has an impressive 13.5kWh capacity complete with a built-in inverter, saving you space in your home without the need for a separate solar inverter.
Thanks to the Tesla One mobile app, monitor your home’s energy production and use in real time, with no subscription cost. Paired with the optional Backup Gateway, it automatically detects power outages from the grid, providing a quick transition to backup power.
- W 609mm x H 1099mm x D 193mm
- 10 years manufacturer warranty
- 13.5kWh battery capacity
- 89% round trip efficiency
Sunsynk - £3,995
Sunsynk’s top-grade Lithium-Iron Phosphate batteries are scalable up to 32 times - a maximum of 170kWh per inverter. So, you can add multiple batteries to your system to store more electricity. Plus, the integrated Battery Management System optimises your battery's performance automatically.
No matter where you are, monitor energy generation, battery status, grid, load statistics, and change settings with the Sunsynk Connect mobile app.
- W 440mm x H 620mm x D 135mm
- 10 years manufacturer warranty
- 5.3kWh battery capacity
- 90% round trip efficiency
Tesla Powerwall 3 - £7,795
The Tesla Powerwall 3 has an impressive 13.5kWh capacity complete with a built-in inverter, saving you space in your home without the need for a separate solar inverter.
Thanks to the Tesla One mobile app, monitor your home’s energy production and use in real time, with no subscription cost. Paired with the optional Backup Gateway, it automatically detects power outages from the grid, providing a quick transition to backup power.
- W 609mm x H 1099mm x D 193mm
- 10 years manufacturer warranty
- 13.5kWh battery capacity
- 89% round trip efficiency
Get up to £750 back on Tesla Powerwall installations.
Tesla is celebrating 1 million Powerwall units installed worldwide by offering a rebate of up to £750 on Powerwall 3 installations.* T&Cs apply.
Sell your excess energy back to the grid.
Thanks to our Smart Export Guarantee (SEG) tariff, you can earn up to 17.5p per kWh by exporting the excess solar energy you produce back to the grid.1
Get your battery in 3 easy steps.
1Get a fixed price quote.
Tell us a bit about your home and energy use, and we’ll give you a fixed price quote for your solar battery system.
2Choose your smart energy plan.
We’ll recommend a tariff to help you make the most of your battery, helping you store energy and save money.
3Installed and ready to go.
Pick a convenient date, and our team will install your battery, ready to start powering your home the smarter way!
Pay for your solar battery, your way.
Spread the cost over 2 years.
Enjoy convenience by spreading the cost of your solar system with our 0% APR3 finance option for up to 2 years.
Pay in full.
Or, you can pay the full amount for your solar battery upfront. It's quick and easy to do with no need for a credit check.
Don't just take our word for it.
We'll always go that extra mile for you, but don't take our word for it, check out what our customers have to say.
Rated 4.5 / 5 based on 189187 reviews. Showing our 5-star reviews.
Support beyond your solar battery purchase.
Every battery module we install comes with:
- 10 year product warranty.
- 2 year workmanship warranty.
- Fully trained battery support team available.
- Online guides at your fingertips.
Get an extra £200 discount as an E.ON Next customer.
Use code SOLAR200 at checkout to apply the discount to solar and battery sales. Only existing customers qualify.3 T&Cs apply.
We offer professional solar battery installation.
For each installation, we will:
- Fit your battery onto the wall.
- Turn your power off for a short while to connect to the battery.
- Usually take just a few hours.
- Make sure your system is fully MCS certified.
Your solar battery FAQs.
Does E.ON Next provide solar battery finance?
Yes, E.ON Next does provide solar battery finance.
Where will the solar battery be installed?
We'll conduct a full survey of your home to decide on the best location for your battery. It has to be fairly close to your main consumer unit. We normally aim to place the battery in a cupboard, garage, utility room, or similar.
How big are solar batteries?
The typical wall space required for an inverter and battery system is just over 1m in width and between 1.3m and 1.9m in height. However, it depends on the power and size of the battery. You’ll need somewhere to house the battery and system, such as a garage or utility room.
What size solar battery do I need?
The solar battery size that’s right for you will depend on your lifestyle and specific needs. The best way to find out is by getting a quote from us. You can discuss everything in detail with one of our experts before going ahead with the installation.
What's the lifespan of a solar battery?
The average lifespan of a solar battery is around ten years, but this can vary depending on the type of battery, the usage, and the maintenance. Our battery systems come with a 10 year manufacturer’s warranty.
Can I have a solar battery outside?
Yes, you can. If we can’t find anywhere to fit a battery inside, you can have your solar battery wall mounted on the outside of your property. However, it shouldn't be in view of direct midday sun, (i.e. not on a south-facing wall) or be exposed to direct rain, and a roof or shelter will be required.
What are E.ON solar batteries made of?
We use lithium iron phosphate (LFP) battery chemistry, which is one of the safest types of lithium ion battery. LFP batteries can do more charge/discharge cycles than other types of solar batteries. As a result, LFP batteries have longer lifespans and a lower environmental impact when compared to cobalt-based batteries.
The legal bit.
* Get up to £750 back on Tesla Powerwall 3 installations. Specific conditions apply. Eligibility is subject to meeting all requirements, and reimbursements may be rejected if conditions are not met. Offer ends 31 March 2026. Review the full eligibility criteria below before proceeding. Read full T&Cs.
1 Smart Export Guarantee (SEG) payments, are payments for electricity you export to the grid. These savings figures are based on the Next Premium v3 Export tariff from E.ON Next of 17.5p per kWh (kilowatt hour) for E.ON Next import-tariff customers who purchase a solar solution.
2 Offer applies to E.ON Next customers only when purchasing solar panels and a battery using the code SOLAR200. Terms and conditions apply.
3 E.ON Energy Installation Services Limited is a credit broker not a lender and work exclusively with HomeServe Finance Limited who acts as the lender under Firm Reference Number 994955. Any credit is subject to status, affordability and a credit check; HomeServe Finance Limited terms and conditions apply.
E.ON Next Energy Limited is an Introducer Appointed Representative of E.ON Energy Installation Services Limited and is authorised and regulated by the Financial Conduct Authority under Firm Reference Number 973651.
Zuno Partners Limited is an Appointed Representative of E.ON Energy Installation Services Limited and is authorised and regulated by the Financial Conduct Authority under Firm Reference Number 1043798.
E.ON Energy Installation Services Limited is authorised and regulated by the Financial Conduct Authority for credit broking services under Firm Reference Number 750410. Registered in England and Wales under company number 09965944 at Westwood Way, Westwood Business Park, Coventry, CV4 8LG.