Battery Storage
Best Home Battery Storage UK 2026
Store your solar energy, cut your bills and protect against outages. We compare the top home battery systems available through UK installers in 2026 — with honest prices and real verdicts.
Affiliate disclosure: Some links on this page may be affiliate links. If you purchase through them we earn a small commission at no extra cost to you. This doesn’t affect our recommendations.
A home battery stores surplus solar energy during the day and releases it in the evening — turning a system that exports 40–50% of its generation into one that uses 75–85% on site. At current UK electricity prices, that difference is worth an extra £600–£1,000 per year on top of what your solar panels already save.
Want to see the numbers for your home? Use our free battery storage calculator to model your savings based on your solar system, electricity usage and tariff.
Best Home Battery Storage UK 2026 — At a Glance
| Battery | Capacity | Installed Cost | Warranty | Best For |
|---|---|---|---|---|
| Tesla Powerwall 3 | 13.5 kWh | £8,500–£11,500 | 10 years | ⭐ Best Overall |
| Fox ESS EP11 | 10.4 kWh | £5,500–£7,500 | 10 years | 💷 Best Value |
| GivEnergy All-in-One | 9.5–13.5 kWh | £5,000–£7,000 | 12 years | 🏆 Best Warranty |
| Myenergi Libbi | 5–30 kWh | £4,500–£8,000 | 10 years | 🚗 Best for EV owners |
| Sigenergy SigenStor | 5–100+ kWh | £6,000–£9,000 | 10 years | 🔮 Best Future-Proof |
1. Tesla Powerwall 3 — Best Overall
The Tesla Powerwall 3 is the most complete home battery system available in the UK in 2026. At 13.5 kWh it stores more than most competitors, the app is the best in class, and it includes a built-in solar inverter — meaning you don’t need a separate hybrid inverter, which simplifies installation and reduces total system cost for new solar buyers.
The whole-home backup gateway means the Powerwall 3 can keep your home running during a grid outage — something most competing batteries can’t do as standard. It also has the best Octopus Energy integration in the market, allowing fully automated tariff optimisation.
Whole-home backup
Best-in-class app
Octopus integration
Premium price
2. Fox ESS EP11 — Best Value
The Fox ESS EP11 is the best value home battery available in the UK in 2026. At 10.4 kWh it covers most households’ evening electricity needs, it’s 35–45% cheaper than Tesla Powerwall for comparable capacity, and it can be expanded to 41 kWh using up to four units. The slimline wall-mounted design fits neatly in a garage or utility room.
It’s particularly well-suited as a retrofit to existing solar installations — the AC-coupled design means it works with most existing inverters without requiring a complete system redesign. Fox ESS has a strong UK installer network and the app is straightforward to use.
Wall-mounted slimline
Expandable to 41 kWh
Good retrofit option
3. GivEnergy All-in-One — Best Warranty
GivEnergy offers the longest warranty in the market at 12 years — two years more than most competitors — and has been the UK’s most-installed home battery brand. The All-in-One combines battery and inverter in a single unit, the GivEnergy Cloud app is widely considered the best monitoring platform available, and the modular design allows expansion over time.
⚠️ Important note: GivEnergy entered administration in April 2026 and was subsequently acquired. Existing units continue to work normally and warranty claims are being processed. However confirm current warranty support arrangements with your installer before purchasing.
Best monitoring app
Modular expansion
Verify warranty support first
4. Myenergi Libbi — Best for EV Owners
Myenergi is a British company best known for the Zappi EV charger. The Libbi battery integrates natively with Zappi — meaning your solar, battery and EV charging all work together intelligently as a single ecosystem. If you have or plan to get a Zappi charger, the Libbi is the natural battery choice — the integration is seamless in a way no other combination can match.
The modular design starts at 5 kWh and expands to 30 kWh. It’s a British product with UK-based support — which matters when you need warranty work done. Read our EV charger guide for more on the Zappi.
British brand
5–30 kWh modular
UK support
5. Sigenergy SigenStor — Best Future-Proof
Sigenergy is a newer entrant to the UK market but has made a strong impression with its highly modular SigenStor system. Unlike most batteries which require a separate EV charger, the SigenStor can manage EV charging, solar, battery and grid connection from a single integrated system — making it the most complete whole-home energy management solution available.
The massive capacity range — starting at 5 kWh and expandable to over 100 kWh — future-proofs it against adding heat pumps, EVs or even small commercial loads. It’s the right choice if you’re planning a major home energy overhaul rather than just adding battery storage.
Massively expandable
Whole-home energy management
Newer UK track record
What to Look for When Choosing a Home Battery
-
1
Capacity (kWh)
Most UK households use 1–3 kWh between 4pm and 11pm — the period after solar generation tails off. A 5 kWh battery covers most homes. 10 kWh covers high-usage homes or those who want grid backup. If you have an EV, size up. -
2
Chemistry — LFP is standard
All batteries on this list use Lithium Iron Phosphate (LFP) — safer and longer-lasting than older NMC chemistry. Rated for 6,000+ cycles which is roughly 16 years of daily use. If a quote uses NMC, ask why. -
3
Inverter compatibility
If you’re retrofitting a battery to existing solar, check compatibility with your current inverter. Fox ESS and Tesla Powerwall 3 work with most systems. Some brands require their own hybrid inverter which adds cost. -
4
Smart tariff compatibility
The biggest payback improvement comes from pairing your battery with Octopus Go, Agile or Flux — charging cheaply overnight and discharging at peak rates. Tesla Powerwall 3 and Fox ESS have the best Octopus integration. -
5
Backup power capability
Not all batteries can power your home during a grid outage. Tesla Powerwall 3, GivEnergy All-in-One and Sunsynk support this. If home backup matters to you, check this before buying — it adds £200–£500 to install cost. -
6
Installer quality
A battery installed by a poor installer will underperform regardless of the brand. Use MCS-certified installers only. Ask for post-install performance data from at least 3 of their recent customers before committing.
Is Home Battery Storage Worth It in 2026?
Yes — if you have solar panels or are on a time-of-use tariff. Payback periods have dropped from 10–12 years to 5–8 years as battery prices have fallen around 25% since 2023 and smart tariffs have become more widely available.
✅ Worth it if you…
- →Have solar panels — adds £600–£1,000/yr extra savings
- →Are on or willing to switch to Octopus Go/Agile/Flux
- →Have high evening electricity usage
- →Want protection against power outages
⚠️ Less compelling if you…
- →Don’t have solar panels and pay a flat tariff
- →Use most of your electricity during the day
- →Plan to move house within 5 years
Use our free battery storage calculator to see your personalised payback period based on your solar system size, electricity usage and current tariff.
Not Ready for a Full System? Portable Power Stations
If you rent, want backup power without a full installation, or just want to try battery storage before committing — portable power stations are available on Amazon right now with no installation needed.
EcoFlow DELTA 2
1 kWh capacity. Powers appliances, laptops, lights. Charges from solar panels or mains. Best entry-level portable station.
Jackery Explorer 2000 v2
2 kWh capacity. Powers larger appliances. Expandable with solar panels. Best for higher power needs or longer outages.
Frequently Asked Questions
Calculate your battery storage savings
See your personalised payback period, annual savings and 25-year return based on your solar system and usage.
Ready to get battery storage quotes?
Compare quotes from MCS-certified installers. Installing battery with solar saves £1,000–£1,500 on installation versus retrofitting later.
Last updated: June 2026. Installed prices based on UK market data Q2 2026 and include 0% VAT. Savings estimates based on current Ofgem electricity rate of 27p/kWh and Octopus Go off-peak rate of 9p/kWh. Actual savings vary by location, usage pattern and tariff. Always verify current warranty terms with your installer before purchasing. GivEnergy administration status correct at time of publication — verify current ownership and warranty arrangements before purchase.