Best Solar Batteries UK 2026: Ranked & Compared
An independent, honestly-ranked guide to the top home solar batteries — compared on real installed cost, value, backup and warranty. Including the once-top brand we no longer recommend, and how to size yours right.
The short answer
There’s no single “best” solar battery — the right one depends on your home, budget and tariff — but the 2026 leaders are clear. The Tesla Powerwall 3 is the standout premium all-rounder (13.5kWh, integrated inverter, whole-home backup as standard). Fox ESS is the best-value/budget pick (modular from ~£4,000), Sunsynk leads on cost-per-kWh, Pylontech on modular flexibility, SolarEdge for its ecosystem, and Enphase for safety and microinverter homes.
The most important 2026 change: GivEnergy — long a top recommendation — entered administration in April 2026 and no longer honours warranties, so we no longer recommend it for new installs (full explanation below). And the golden rule for any battery: size it around your evening electricity use, not your panels, and pair it with a smart tariff — that’s what turns a battery from a slow-payback gadget into a genuine investment (5–7 year payback on a time-of-use tariff). The full ranking, prices and buying guide below — or book a free home survey to get the right battery matched to your home.
What this guide covers
Going Solar UK is an independent introduction service — we don’t sell batteries, so this ranking reflects honest current standing, not who pays the most commission. We’ve reviewed every major battery brand in depth (linked throughout), and this guide pulls them together into a straight answer to “which is the best solar battery for me?” — including the uncomfortable truth about a brand most lists still rank #1.
The best solar batteries UK 2026: at a glance
| Battery | Best for | Capacity | Installed price |
|---|---|---|---|
| Tesla Powerwall 3 | Best all-rounder / backup | 13.5kWh | £7,400–£11,500 |
| Fox ESS | Best value / budget | 5–28kWh (modular) | from ~£4,000 |
| Sunsynk | Best £/kWh | 5–20kWh | £3,500–£5,200 |
| Pylontech | Best modular / scalable | 2.4kWh+ (stackable) | £4,800–£10,500 |
| SolarEdge | SolarEdge-system homes | 10kWh | ~£6,800 |
| Enphase | Safety / microinverter homes | 5kWh+ (modular) | £5,000+ |
| Duracell / Puredrive | Trusted-name value | 5kWh+ | from ~£4,000 |
| GivEnergy | ⚠ In administration — avoid | — | Warranty void |
All the batteries we recommend use LFP (lithium iron phosphate) chemistry, now the residential standard for its superior safety and temperature tolerance, and all carry 0% VAT until March 2027. Below, the honest case for each — and the one to steer clear of.
The top picks, ranked
1. Tesla Powerwall 3 — best all-rounder (if budget allows)
The Tesla Powerwall 3 is the battery to beat in 2026. It packs 13.5kWh of usable capacity, a built-in solar inverter (replacing a separate unit), and — uniquely at this level — a whole-home backup gateway as standard, so it keeps your whole house running in a power cut with seamless switchover. Add an unlimited-cycle 10-year warranty and the best app in the business, and it’s the most complete package available. The catches: at £7,400–£11,500 installed it’s among the priciest (roughly £650/kWh, about double a budget rival per kWh), it’s a bigger single-unit commitment with no smaller variant, and it runs a little louder (~40dB) than some. Worth it if you want simplicity, whole-home backup, and top software — especially if you drive a Tesla.
2. Fox ESS — best value / budget pick. Fox ESS is where most value-focused buyers should look: modular systems from around £4,000 (8kWh), stackable up to 28kWh later, a 12-year warranty on the EQ range, and hybrid-inverter backup capability. On a price-per-kWh basis it’s hard to beat, and the modularity means you can start sensibly and grow. The go-to for homes where 9–10kWh covers evening use.
3. Sunsynk — best cost-per-kWh. Sunsynk offers the keenest £/kWh of the mainstream brands (5.12–5.32kWh modular units from ~£3,500), with off-grid-style resilience and strong hybrid-inverter integration. A favourite for value-conscious buyers who still want robust backup capability.
4. Pylontech — best modular / scalable. Pylontech is the “Lego” of batteries: utilitarian, rack-mounted units you can start small with (from 2.4kWh) and stack over time. Incredibly reliable, widely compatible with third-party hybrid inverters, and a mid-market mainstay — ideal if you want to scale gradually.
5. SolarEdge — best for SolarEdge systems. The SolarEdge Home Battery is superb if you already have (or are installing) a SolarEdge inverter — class-leading 94.5% round-trip efficiency and tight one-app integration — but it only works within that ecosystem, so it’s a niche pick outside it.
6. Enphase — best for safety & microinverter homes. The Enphase IQ Battery is fully AC-coupled and modular, with a class-leading 15-year warranty and top-tier safety — the natural choice for homes on Enphase microinverters, though it’s premium per kWh.
Also worth a look: Duracell (the trusted-name Dura5 at ~£4,000), Puredrive (UK value), and SolaX (solid modular hybrid) all earn their place for the right buyer — see our full reviews for the detail.
The GivEnergy warning (why it’s not on the list)
⚠ GivEnergy entered administration in April 2026 — we no longer recommend it for new installs
This matters, because GivEnergy was until recently one of the UK’s most popular and most-recommended battery brands — and many “best battery 2026” lists still rank it at the top. The honest, current position: GivEnergy Ltd entered administration on 9 April 2026, ceased trading, made all staff redundant, and has confirmed no further hardware warranties will be honoured. In plain terms, a new GivEnergy battery bought today comes with an effectively worthless manufacturer warranty and no official support or repair route. A battery is a 10–15 year purchase, and the financial backing behind its warranty is one of the most important things you’re buying — so we cannot recommend GivEnergy for new installs, however well-regarded the hardware once was. (If you already own one, don’t panic: the hardware runs on local firmware and keeps working — our GivEnergy review has the full owner guidance, and your original installer is your first port of call.) We flag this precisely because we’re independent: our job is to point you toward a battery that’ll still be supported in ten years’ time — of which there are many excellent options above.
How to size a solar battery correctly
The most common — and most expensive — mistake is buying too big. Size your battery around your evening and overnight electricity use, not your solar panel capacity. Most UK homes use just 1–3kWh between 4pm and 11pm (once solar generation has tailed off), so for a typical household a 9–10kWh usable battery covers evening and overnight demand well. Step up to 13–15kWh only if you’re a high-consumption home — charging an EV from stored solar, or running a heat pump — and reserve 15–25kWh for off-grid-style setups or heavy tariff arbitrage. Oversizing genuinely wastes money: a 20kWh battery in a 9kWh household costs far more while the spare capacity rarely cycles, so it never earns its keep. This is why modular brands (Pylontech, Fox ESS, SolarEdge) are so popular — start with the right size and add later, e.g. when you get an EV. Our battery sizing guide walks through the calculation; the short version is match the battery to your evening demand and don’t over-buy.
Why a smart tariff is (almost) essential
A battery’s financial case hinges on your tariff far more than most people realise. It saves money two ways: storing daytime solar for the expensive evening peak, and — the big one — charging from the grid when electricity is cheapest and using it when it’s dearest (tariff arbitrage). That second benefit only works on a time-of-use tariff like Octopus Flux, Cosy or Intelligent Octopus Go. On those, a battery can pay back in 5–7 years (and even a battery-only, no-solar home can profit by buying cheap and using at peak); on a flat standard tariff, payback stretches to 8–15 years. So while a smart tariff isn’t compulsory, choosing a battery compatible with the best smart tariffs — and switching to one — is one of the biggest levers on whether it’s a good investment. Every battery we recommend supports the major smart tariffs; it’s near the top of the checklist for a reason. (See our AC vs DC coupling guide too — it affects retrofit compatibility.)
Costs & payback
| Tier | Typical installed cost | Examples |
|---|---|---|
| Budget (5–8kWh) | ~£4,000 | Fox ESS, Duracell, Puredrive |
| Mid-range (10kWh) | £5,000–£7,000 | Sunsynk, SolarEdge, Pylontech |
| Premium (13.5kWh) | £7,400–£11,500 | Tesla Powerwall 3 |
| Payback (smart tariff) | 5–7 years | Octopus Flux / Cosy |
| Payback (standard tariff) | 8–15 years | Flat-rate import |
Battery prices run £3,500–£11,500 installed (all with 0% VAT to March 2027), and the smartest way to compare is cost per usable kWh — budget modular brands land near £450/kWh, the Powerwall 3 nearer £650/kWh (you pay for its all-in-one design and backup). But price matters less than fit: the right-sized battery on a smart tariff is what delivers the return. The only way to know your real installed cost and payback is a survey of your home, usage and tariff — our batteries hub has the wider detail, and a free home survey gives you the exact numbers.
Frequently asked questions
What is the best solar battery in the UK in 2026?
No single winner — it depends on your home. Tesla Powerwall 3 is the best premium all-rounder (13.5kWh, whole-home backup); Fox ESS the best value; Sunsynk the best £/kWh; Pylontech the best modular. Size it to your evening use and pair with a smart tariff. Note: GivEnergy is no longer recommended (administration).
Is GivEnergy still a good battery in 2026?
No — GivEnergy Ltd entered administration on 9 April 2026, ceased trading and no longer honours warranties, so a new GivEnergy battery has an effectively void warranty and no manufacturer support. We can’t recommend it for new installs. Existing systems keep working — see our review for owner guidance.
How much does a solar battery cost?
£3,500–£11,500 installed (0% VAT to March 2027): ~£4,000 budget (Fox ESS/Duracell 5–8kWh), £5,000–£7,000 mid (Sunsynk/SolarEdge/Pylontech 10kWh), £7,400–£11,500 premium (Tesla Powerwall 3 13.5kWh). Payback 5–7 years on a smart tariff, 8–15 on standard.
What size battery do I need?
Size to your evening use (most UK homes use 1–3kWh from 4–11pm), not your panels. A 9–10kWh battery suits most homes; 13–15kWh for EV/heat-pump homes. Don’t oversize — spare capacity rarely cycles. See our sizing guide.
Do I need a smart tariff?
Not compulsory, but it transforms the payback. A smart time-of-use tariff (Octopus Flux/Cosy/IOG) lets a battery charge cheap and use at peak — 5–7 year payback vs 8–15 on a flat tariff. Even no-solar homes can profit. All our recommended batteries support the major smart tariffs.
Can a battery power my home in a blackout?
Some can, not all — you need backup/EPS functionality. The Tesla Powerwall 3 includes a whole-home backup gateway as standard; Fox ESS and Sunsynk hybrids support backup with the right wiring; many others need extra hardware. See our power-cut backup guide.
The verdict
The best solar battery for you in 2026 isn’t a single product — it’s the one sized correctly for your evening usage, paired with a smart tariff, and backed by a manufacturer that’ll still be around in ten years. On current standing, the Tesla Powerwall 3 leads for an all-in-one premium system with whole-home backup, Fox ESS and Sunsynk win on value, and Pylontech for modular flexibility — with Duracell, Puredrive, SolaX, SolarEdge and Enphase each strong for the right home. The one genuinely important change this year is what’s not on the list: GivEnergy’s administration means we can’t recommend it for new installs, and any guide still ranking it top is out of date.
Because the “best” battery is so dependent on your home, usage and tariff, the single most useful next step isn’t more reading — it’s a proper assessment. Book a free, no-obligation home battery survey and MCS-certified installers will look at your evening consumption, your tariff and your setup, then recommend the right size and model and give you real installed prices to compare. That’s how you get the battery that actually pays for itself — matched to your home, not to a headline.
Important
Going Solar UK is an independent introduction service, not a battery installer or manufacturer. This ranking reflects our honest editorial opinion based on publicly available specifications, pricing and company standing as of September 2026: models, prices, warranty terms and manufacturer circumstances change (the GivEnergy administration being a clear example) – always confirm current details and warranty backing before purchase. Battery suitability, cost and payback depend on your home, usage and tariff. We have no commercial relationship with any battery manufacturer named here.
We may receive a commission when we introduce you to an installer, at no cost to you. Any contract for work is directly between you and the installer.