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.

£4,500–£11,500
Typical installed cost
5–13.5 kWh
Typical capacity range
£600–£1,000
Extra annual savings vs solar alone
0% VAT
Until March 2027
10 years
Typical warranty

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.

Best home battery storage system installed on a UK garage wall
A modern home battery system installed in a UK garage — most systems are wall-mounted and take up minimal space

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. New to solar? Start with our Solar Panels UK guide, or compare export rates with our SEG tariff comparison.

Best Home Battery Storage UK 2026 — At a Glance

Battery Capacity Installed Cost £/kWh Warranty Best For
Tesla Powerwall 3 13.5 kWh £8,500–£11,500 ~£740/kWh 10 years ⭐ Best Overall
Fox ESS EP11 10.4 kWh £5,500–£7,500 ~£578/kWh 10 years 💷 Best Value
Myenergi Libbi 5–30 kWh £4,500–£8,000 ~£694/kWh 10 years 🚗 Best for EV owners
Sigenergy SigenStor 5–100+ kWh £6,000–£9,000 ~£833/kWh 10 years 🔮 Best Future-Proof
Sunsynk 5.32–11 kWh £4,500–£6,800 ~£700/kWh 10 years 🔧 Most Flexible / DIY-Friendly

£/kWh calculated from the lower end of each installed price range against entry-level capacity, for like-for-like comparison. Your actual cost per kWh will vary by installer and configuration — Sunsynk in particular has one of the widest real-world price ranges we've seen, since installers package it very differently.

1. Tesla Powerwall 3 — Best Overall

⭐ Best Overall 2026
Capacity
13.5 kWh
Installed cost
£8,500–£11,500
Warranty
10 years
Backup power
✅ Yes

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.

Built-in solar inverter Whole-home backup Best-in-class app Octopus integration Premium price
Our verdict: The best home battery system money can buy in the UK. The built-in inverter, whole-home backup and superior app justify the premium for most homeowners — especially those buying solar and battery together for the first time.
Is your quote fair? A genuine UK installed quote for the 13.5 kWh Powerwall 3 typically falls within £8,500–£11,500. If you're quoted meaningfully above that, ask what's driving the difference — a bigger job (multiple units, complex electrical work) can justify it, but it's worth a direct answer either way.

⚠️ A note on remote disable capability

In 2025–26, Tesla remotely discharged and disabled a batch of recalled Powerwall 2 units (2020–2022 manufacture) following a battery cell defect, leaving some US and Australian customers without backup power for weeks while awaiting replacement — the subject of an ongoing class-action lawsuit. Tesla has confirmed this specific recall does not affect Powerwall 3, the model we recommend above, and we've found no evidence of the same recall affecting UK-installed units.

Worth knowing regardless of model: any cloud-connected battery can technically be remotely adjusted by the manufacturer. If backup power during outages is your main reason for buying, ask your installer directly how the manufacturer has handled past safety recalls, and whether remote access can be restricted on your account.

2. Fox ESS EP11 — Best Value

💷 Best Value 2026
Capacity
10.4 kWh
Installed cost
£5,500–£7,500
Warranty
10 years
Expandable
✅ 41 kWh

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.

35–45% cheaper than Tesla Wall-mounted slimline Expandable to 41 kWh Good retrofit option
Our verdict: The best choice for most UK homeowners who want a high-performance battery without paying the Tesla premium. Particularly good for retrofitting to an existing solar system.
Is your quote fair? A genuine UK installed quote for the 10.4 kWh EP11 typically falls within £5,500–£7,500. Retrofit installs (adding to existing solar) often sit toward the top of this range due to extra electrical work — that alone doesn't mean you're being overcharged.

3. Myenergi Libbi — Best for EV Owners

🚗 Best for EV Owners
Capacity
5–30 kWh
Installed cost
£4,500–£8,000
Warranty
10 years
Zappi compatible
✅ Native

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.

Native Zappi integration British brand 5–30 kWh modular UK support
Our verdict: The obvious choice if you have or plan to get a Zappi EV charger. The solar-battery-EV integration is genuinely best in class and worth choosing over a technically superior standalone battery.
Is your quote fair? Libbi's modular pricing scales roughly with capacity — expect £4,500 at the small end and up to £8,000 for a fully expanded 30 kWh setup. Ask exactly which capacity is being quoted, since "Libbi" alone doesn't tell you the size.

4. Sigenergy SigenStor — Best Future-Proof

🔮 Best Future-Proof
Capacity
5–100+ kWh
Installed cost
£6,000–£9,000
Warranty
10 years
EV charging
✅ Built-in

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.

Built-in EV charging Massively expandable Whole-home energy management Newer UK track record
Our verdict: The most technically impressive system on this list. Best for homeowners planning solar, battery, EV charging and heat pump as an integrated system rather than piecing together separate products.
Is your quote fair? Entry-level SigenStor configurations typically start around £6,000 installed. Given how new the brand is to the UK, get at least two comparative quotes before committing — installer pricing confidence on Sigenergy varies more than on established brands.

5. Sunsynk — Most Flexible / DIY-Friendly

🔧 Most Flexible
Capacity
5.32–11 kWh
Installed cost
£4,500–£6,800
Warranty
10 years
Expandable
✅ Up to 32 units

Sunsynk has built a strong reputation among UK installers for genuine flexibility — its hybrid inverters are sometimes described as the "Swiss Army knife" of the battery world, since they pair well with a wide range of third-party battery packs (not just Sunsynk's own), giving installers real freedom to design a system around your specific home rather than a fixed package.

It's a genuinely popular choice with installers who like more control over system design, and with homeowners who may want to expand capacity significantly over time — up to 32 batteries can theoretically be stacked on one system. Real-world installed pricing varies more than any other brand on this list, since installers package it very differently depending on inverter size and battery brand paired with it.

Wide third-party compatibility Installer favourite Highly expandable Wide price variance
Our verdict: A genuinely strong choice if you want flexibility over a fixed ecosystem, or you're working with an installer who has a strong track record with Sunsynk specifically. The wide price range makes multiple quotes especially important here.
Is your quote fair? Genuine UK Sunsynk installs range surprisingly widely — from around £3,500 for a basic 5.32 kWh retrofit to £6,800+ for larger modular setups. This is the one brand on this page where "get three quotes" matters most, since pricing consistency between installers is genuinely lower than for Tesla or Fox ESS.
UK home with solar panels and battery storage system installed
Solar panels combined with battery storage can cut household electricity bills by £1,000–£1,500 per year

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 and Sunsynk (via a compatible EPS box) support this. If home backup matters to you, check this specifically before buying — it adds £200–£500 to install cost, and confirm what happens to that backup capability if the manufacturer ever issues a remote safety update.
  • 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.

Portable power station charging on a UK kitchen worktop
Portable power stations require no installation — charge from the mains or directly from solar panels

EcoFlow DELTA 2

1 kWh capacity. Powers appliances, laptops, lights. Charges from solar panels or mains. Best entry-level portable station.

~£599
Check Price at EcoFlow →

Jackery Explorer 2000 v2

2 kWh capacity. Powers larger appliances. Expandable with solar panels. Best for higher power needs or longer outages.

~£799 £600 off RRP £1,399
Check Price at Jackery →
UK homeowner checking home battery storage app on smartphone
All modern home batteries come with a smartphone app to monitor generation, storage and savings in real time

Frequently Asked Questions

Do I need solar panels to get a home battery?

No — but without solar panels the economics only work if you're on a time-of-use tariff like Octopus Go or Agile, charging the battery cheaply overnight and discharging during expensive peak hours. On a flat-rate tariff, a battery without solar rarely pays back.

How long does a home battery last?

Modern LFP batteries are rated for 6,000 cycles to 80% capacity — roughly 16 years of daily cycling. Most come with a 10-year warranty. They'll continue working beyond the warranty period at reduced capacity.

What size battery do I need?

Most UK households use 1–3 kWh in the evening after solar generation stops. A 5 kWh battery covers most homes comfortably. Go for 10 kWh if you have high evening usage, an EV, or want to also charge from the grid overnight on a smart tariff. Use our battery calculator for a personalised recommendation.

Is 0% VAT available on battery storage?

Yes — 0% VAT applies to battery storage systems installed in UK homes until March 2027, whether installed alongside new solar panels or retrofitted to an existing system. This saves around £900–£2,300 depending on system size.

Can I get a grant for home battery storage?

There's no direct battery-only grant for most homeowners. However the Warm Homes Plan includes battery storage for eligible low-income households. The 0% VAT until March 2027 is effectively a 20% discount. Check your eligibility with our free ECO4 checker.

Calculate your battery storage savings

See your personalised payback period, annual savings and 25-year return based on your solar system and usage.

Get Free Battery Storage Quotes

Whether you're adding a battery to existing solar or starting from scratch with a battery-only setup, tell us your situation and we'll match you with the right MCS-certified installer.

✅ Free · ✅ No obligation · ✅ MCS certified installers only

Last updated: September 2026. Installed prices based on aggregated UK installer pricing data, 2026, and include 0% VAT. Savings estimates based on the October 2026 Ofgem electricity rate of 26.32p/kWh and a typical off-peak tariff rate of 7.5p/kWh. Actual savings vary by location, usage pattern and tariff. Always verify current warranty terms with your installer before purchasing. GivEnergy administration status and the Tesla Powerwall 2 recall details correct at time of publication — verify current status directly before purchase.