Adding a solar battery to your solar panel system is one of the smartest ways to maximise the value of your solar investment. Instead of exporting unused electricity back to the grid, a battery stores excess energy so you can use it later—during the evening, overnight, or when electricity prices are higher.
With battery storage becoming increasingly popular across the UK, homeowners now have more options than ever. But choosing the right battery depends on your home’s energy usage, future expansion plans, budget, and whether you also want features like EV charging or backup power.
At EcoBridge, we help homeowners across the UK choose and install the most suitable solar battery systems. Here’s our guide to the Top 5 Solar Batteries in the UK for 2026.
Why Install a Solar Battery?
A solar battery helps you:
- Store excess solar energy instead of exporting it.
- Increase your solar self-consumption.
- Reduce reliance on the National Grid.
- Save more by using stored electricity during peak-rate hours.
- Pair with smart tariffs to charge batteries when electricity is cheapest.
For many households, battery storage can significantly improve the return on investment from a solar panel system.
Our Top 5 Solar Batteries in the UK (2026)
| Battery | Best For |
| Fox ESS | Flexible, scalable systems and excellent value. |
| Anker SOLIX | Modern homes looking for stylish expandable storage. |
| SigEnergy | Large households with high energy demand. |
| Powervault | UK-made smart battery with AI energy management. |
| Tesla Powerwall 3 | Premium all-in-one battery with backup power features. |
1. Fox ESS – Best Overall Solar Battery
Fox ESS has become one of the UK’s most popular home battery brands thanks to its flexibility, affordability, and excellent performance.
Why We Recommend Fox ESS
Pros
- Modular battery sizes from approximately 2.3 kWh to 10.4 kWh.
- Expandable systems up to around 45 kWh.
- Compact stacked design saves floor space.
- Cost-effective to upgrade as your energy needs grow.
Fox ESS is ideal for homeowners who want a future-proof system that can grow alongside additional solar panels, EV chargers, or increased household electricity use.
Cons
- Installation is more technical than some plug-and-play battery systems.
- Professional design and installation are recommended for optimal performance.
Best for: Most UK homes looking for a scalable and affordable battery solution.
2. Anker SOLIX – Best Design & Expandability
Anker is well known for consumer electronics, and its SOLIX battery range is quickly gaining popularity in the UK solar market.
Why Choose Anker SOLIX?
Pros
- Sleek, modern appearance.
- Expandable modular battery design.
- Single-phase options between approximately 3.68 kW and 6 kW.
- Excellent smart monitoring through the Anker app.
Cons
- Only one stackable battery platform is currently available.
- Larger storage systems require significant vertical space.
Best for: Homeowners who value aesthetics and smart home integration.
3. SigEnergy – Best for Large Energy Users
SigEnergy combines battery storage, inverter technology, EV charging, and intelligent energy management into one ecosystem.
Why Choose SigEnergy?
Pros
- Expandable up to around 60 kWh on single-phase systems.
- High storage capacity for large homes.
- Integrated smart energy management platform.
- Suitable for homes with heat pumps and EV charging.
Cons
- Limited battery module sizes.
- Module capacities cannot be mixed within one system.
Best for: Large family homes and high electricity consumption households.
4. Powervault – Best UK-Made Smart Battery
Powervault is a British battery manufacturer focused on intelligent home energy storage.
Why Choose Powervault?
Pros
- Designed and supported in the UK.
- SMARTSTOR AI software optimises charging and discharging.
- Learns household energy usage patterns.
- Strong value for money.
Cons
- Lower maximum storage capacity than some competitors.
- Larger storage systems require multiple battery units.
Best for: Homeowners wanting an intelligent battery that automatically maximises savings.
5. Tesla Powerwall 3 – Best Premium Battery
Tesla remains one of the most recognised names in home battery storage.
Why Choose Tesla Powerwall 3?
Pros
- Integrated hybrid inverter.
- 13.5 kWh usable battery capacity.
- High continuous power output.
- Storm Watch feature prepares for severe weather and potential power outages.
- Excellent Tesla app and monitoring.
Cons
- Higher upfront investment.
- Expanding storage is more expensive than modular battery systems.
- Earlier Powerwall models are not directly compatible.
Best for: Homeowners wanting a premium, all-in-one battery with backup power capability.
Quick Comparison of the Top 5 Solar Batteries
| Battery | Scalable | Best Feature |
| Fox ESS | ✅ Up to 45 kWh | Affordable modular expansion. |
| Anker SOLIX | ✅ Yes | Stylish design and smart monitoring. |
| SigEnergy | ✅ Up to 60 kWh | Very large storage capacity. |
| Powervault | ✅ Up to 20 kWh | AI-powered energy optimisation. |
| Tesla Powerwall 3 | ⚠ Limited expansion | Integrated inverter and backup power. |
Which Solar Battery Is Right for Your Home?
The best battery depends on your household’s electricity usage and future plans.
| Your Priority | Recommended Battery |
| Best overall value | Fox ESS |
| Premium smart battery | Tesla Powerwall 3 |
| Large family home | SigEnergy |
| AI-powered energy savings | Powervault |
| Modern design and app controls | Anker SOLIX |
A professional solar installer can assess your current electricity consumption, solar generation, roof space, and future energy needs before recommending the ideal battery size.
Why Choose EcoBridge for Solar Battery Installation?
EcoBridge provides expert solar battery installation and energy solutions for homeowners across the UK. We help you select the right battery based on your home’s energy requirements and ensure it is installed safely and efficiently.
What You Get with EcoBridge
- MCS-compliant solar battery installations.
- Expert advice tailored to your property.
- High-quality battery brands from trusted manufacturers.
- Professional installation by qualified engineers.
- Ongoing support and monitoring guidance.
Whether you’re installing a new solar system or adding battery storage to an existing one, EcoBridge can help you maximise your energy savings.
Contact EcoBridge
EcoBridge Energy
Solar Panels
Battery Storage
EV Chargers
Email: info@ecobridgeenergy.com
Website: https://ecobridgeenergy.com/
Frequently Asked Questions (FAQs)
1. What is the best solar battery in the UK for 2026?
Fox ESS is one of the best all-round choices for many UK homeowners because it offers excellent scalability, strong performance, and competitive pricing. However, the best battery depends on your home’s energy usage and budget.
2. Is a solar battery worth it in the UK?
Yes. A solar battery allows you to store excess solar energy generated during the day and use it later, helping reduce electricity bills and increase your use of renewable energy.
3. How much battery storage does a typical UK home need?
Most UK homes benefit from 5–15 kWh of battery storage, depending on household size, solar panel output, EV charging, and heating systems.
4. Can I add a battery to an existing solar panel system?
Absolutely. Most existing solar PV systems can be upgraded with a compatible battery storage system, although the installation method depends on your current inverter setup.
5. How long do solar batteries last?
Most modern lithium-ion solar batteries last 10–15 years and typically come with warranties of around 10 years, depending on the manufacturer.
6. Can a solar battery power my home during a power cut?
Some batteries, such as the Tesla Powerwall 3, can provide backup power during outages when installed with the appropriate backup configuration. Not all batteries include this feature.
7. Which solar battery is best for homes with an EV charger?
SigEnergy and Fox ESS are excellent choices because they can be expanded for higher energy demand and integrate well with EV charging systems.
8. How much does a solar battery cost in the UK?
The cost typically ranges from £2,500 to £10,000+, depending on battery capacity, brand, installation requirements, and whether an inverter is included.
9. Can I expand my battery storage later?
Yes, many modular battery systems—including Fox ESS, Anker SOLIX, and SigEnergy—allow additional battery modules to be added as your energy needs increase.
10. How do I choose the right solar battery?
Consider your daily electricity consumption, solar panel size, future energy needs (such as EV charging or a heat pump), available installation space, and budget. A professional installer like EcoBridge can recommend the most suitable system for your home.
Final Thoughts
Home battery storage is becoming an essential part of modern solar systems in the UK. Whether you’re looking for affordability, premium features, or maximum storage capacity, there is a battery to suit every household.
At EcoBridge, we help homeowners choose the right battery storage solution to maximise savings, increase energy independence, and get the most from their solar panels.
