SolarGridCheck.co.uk

Grid Viability Assessment Tool

Updated April 2026

Best Home Battery Storage UK (2026)

We compared 7 home batteries on price, capacity, warranty, and real-world performance. Here are the ones worth buying.

See the Comparison

Disclosure: This page contains affiliate links. We may earn a commission at no extra cost to you. All opinions are our own and based on independent research.

Quick Answer: Which Battery Should You Buy?

Best Overall

GivEnergy 5.2kWh — £423–£538/kWh

Best Value

Sunsynk 5.12kWh — £352–£469/kWh

Best Budget

Fox ESS ECS 4.03kWh — £372–£496/kWh

£1,500–£9,500

Typical Cost

Fully installed

5–8 years

Payback Period

With smart tariff

70–80%

Self-Consumption

With solar + battery

10–12 years

Warranty

Industry standard

Home Battery Comparison Table

BatteryCapacityCost (Installed)£/kWhWarrantyRatingBest For
GivEnergy 5.2kWh5.2 kWh£2,200–£2,800£423–£53812 years4.7Best overall — value, reliability, UK support
Tesla Powerwall 313.5 kWh£7,500–£9,500£556–£70410 years4.5Best capacity — large homes and EV owners
Myenergi Libbi 5kWh5 kWh£2,800–£3,500£560–£70010 years4.3Best for Myenergi ecosystem (Zappi + Eddi users)
Sunsynk 5.12kWh5.12 kWh£1,800–£2,400£352–£46910 years4.4Best installer favourite — flexible and affordable
Fox ESS ECS 4.03kWh4.03 kWh£1,500–£2,000£372–£49610 years4.1Best budget — cheapest per kWh installed
EcoFlow Delta Pro Ultra6 kWh£3,500–£4,500£583–£7505 years4Best portable — plug-and-play, no installation needed
BYD HVS 5.1kWh5.12 kWh£2,500–£3,200£488–£62510 years4.3Best premium — proven commercial-grade technology

Not sure which battery suits your home?

Tell us your postcode and energy setup — we'll email you a personalised pick.

Get My Recommendation

Detailed Reviews

#1

GivEnergy 5.2kWh

Best overall — value, reliability, UK support

4.7/5

£2,200–£2,800

Capacity

5.2 kWh

Cost/kWh

£423–£538

Warranty

12 years

Phases

Single phase

Pros

  • UK-based company with local support
  • Modular — stack up to 4 units (20.8 kWh)
  • Excellent app with real-time monitoring
  • Compatible with most solar inverters
  • 12-year warranty as standard

Cons

  • Single phase only (no 3-phase option)
  • Requires GivEnergy inverter or AC adapter
  • Larger footprint than some competitors
View on GivEnergy
#2

Tesla Powerwall 3

Best capacity — large homes and EV owners

4.5/5

£7,500–£9,500

Capacity

13.5 kWh

Cost/kWh

£556–£704

Warranty

10 years

Phases

Single or three phase

Pros

  • 13.5 kWh in a single unit — no stacking needed
  • Built-in inverter and backup gateway
  • Seamless whole-home backup during outages
  • Three-phase compatible
  • Tesla app with Storm Watch and energy forecasting

Cons

  • Higher upfront cost
  • Must use Tesla-certified installer
  • Long lead times in the UK (4-8 weeks)
View on Tesla
#3

Myenergi Libbi 5kWh

Best for Myenergi ecosystem (Zappi + Eddi users)

4.3/5

£2,800–£3,500

Capacity

5 kWh

Cost/kWh

£560–£700

Warranty

10 years

Phases

Single phase

Pros

  • Seamless integration with Zappi EV charger and Eddi diverter
  • UK designed and manufactured
  • Smart energy management across home devices
  • Modular — stack up to 20 kWh
  • Green energy matching feature

Cons

  • Premium price for the capacity
  • Best value only if you already have Myenergi products
  • Relatively new product — less long-term track record
View on Myenergi
#4

Sunsynk 5.12kWh

Best installer favourite — flexible and affordable

4.4/5

£1,800–£2,400

Capacity

5.12 kWh

Cost/kWh

£352–£469

Warranty

10 years

Phases

Single or three phase

Pros

  • Excellent value per kWh
  • Widely supported by UK installers
  • Three-phase hybrid inverter available
  • Modular up to 15.36 kWh
  • Strong monitoring platform

Cons

  • Brand less well-known to homeowners
  • Relies on installer for setup and commissioning
  • Customer support via installer, not direct
View on Sunsynk
#5

Fox ESS ECS 4.03kWh

Best budget — cheapest per kWh installed

4.1/5

£1,500–£2,000

Capacity

4.03 kWh

Cost/kWh

£372–£496

Warranty

10 years

Phases

Single phase

Pros

  • Lowest entry price for a full home battery system
  • Lightweight and compact
  • Modular — stack up to 16.12 kWh
  • Good installer availability
  • 10-year warranty standard

Cons

  • Smaller base capacity (4.03 kWh)
  • App less polished than GivEnergy or Tesla
  • Single phase only
View on Fox ESS
#6

EcoFlow Delta Pro Ultra

Best portable — plug-and-play, no installation needed

4/5

£3,500–£4,500

Capacity

6 kWh

Cost/kWh

£583–£750

Warranty

5 years

Phases

Single phase

Pros

  • No installation required — plug into wall socket
  • Portable — can be moved between locations
  • Works without solar panels (charge from grid at off-peak)
  • Built-in inverter with multiple outlets
  • Good for renters who can't modify the property

Cons

  • Higher cost per kWh than installed systems
  • 5-year warranty (shorter than competitors)
  • Not a true whole-home solution
  • Less efficient than hardwired systems
View on EcoFlow
#7

BYD HVS 5.1kWh

Best premium — proven commercial-grade technology

4.3/5

£2,500–£3,200

Capacity

5.12 kWh

Cost/kWh

£488–£625

Warranty

10 years

Phases

Three phase (via compatible inverter)

Pros

  • Cobalt-free LFP chemistry — very safe
  • Modular tower design up to 12.8 kWh
  • Works with SMA, Fronius, Victron, and other top inverters
  • Excellent cycle life (6,000+ cycles)
  • Strong track record in commercial and residential

Cons

  • Premium price point
  • Requires separate inverter (not all-in-one)
  • Tower design takes more floor space
View on BYD

Get a Free Battery Recommendation

Tell us about your home and we'll email you a personalised recommendation — no spam, no hard sell.

No spam. Unsubscribe any time. See our privacy policy.

How to Choose the Right Battery for Your Home

Choosing a home battery depends on four factors: your budget, whether you have solar panels, your electricity usage, and your property type.

If you have solar panels

A 5kWh battery suits most 3–4kW solar systems. It stores excess daytime generation for evening use, boosting self-consumption from ~35% to ~75%.

Our pick: GivEnergy 5.2kWh

If you don't have solar

Use a battery for tariff arbitrage — charge at 7p/kWh off-peak, use at 28p/kWh peak. The EcoFlow Delta Pro Ultra needs no installation and is ideal for renters.

Our pick: EcoFlow Delta Pro Ultra

If you want maximum capacity

The Tesla Powerwall 3 offers 13.5kWh in a single unit — enough for large homes, EV owners, or those wanting full backup power during outages.

Our pick: Tesla Powerwall 3

If you're on a budget

The Fox ESS ECS starts at £1,500 installed — the cheapest entry point. Sunsynk offers better value per kWh if you can stretch to £1,800.

Our pick: Sunsynk 5.12kWh

Home Battery Costs Breakdown (2026)

Cost Component5kWh System10kWh System13.5kWh System
Battery unit£1,000–£1,800£2,000–£3,200£3,500–£5,000
Inverter (if needed)£500–£800£500–£800Included (Powerwall)
Installation labour£400–£600£500–£800£800–£1,200
Electrical work & DNO£200–£400£200–£400£300–£500
Total installed£1,800–£3,500£3,200–£5,200£7,500–£9,500
Annual savings (est.)£300–£600£500–£900£700–£1,100
Payback period5–7 years5–7 years7–9 years

Prices based on UK installer quotes as of Q1 2026. Includes VAT at 0% (home battery storage is VAT-exempt until March 2027).

Important: Grid Connection Requirements

Most home batteries exceed the 3.68kW threshold, which means they need a G99 grid connection application through your local DNO. Your installer handles this, but it adds 45–65 working days to the timeline.

G98 vs G99: What you need to know

Frequently Asked Questions

Frequently Asked Questions

Home batteries in the UK cost between £1,500 and £9,500 fully installed, depending on capacity. A typical 5kWh system costs £1,800–£3,500. The Tesla Powerwall 3 (13.5kWh) is the most expensive at £7,500–£9,500 but offers the highest capacity in a single unit.
Yes, for most households. With electricity at 24–28p/kWh and off-peak rates as low as 7p/kWh on smart tariffs like Octopus Go, a battery can save £300–£700/year. With solar panels, savings increase to £500–£900/year. Payback is typically 5–8 years, with batteries lasting 10–15 years.
Most UK homes use 8–10kWh of electricity per day. A 5kWh battery covers evening peak usage (4pm–9pm) for a typical household. Larger homes, EV owners, or those wanting full backup should consider 10–13.5kWh. If you have solar panels, match battery size to your daily export — usually 3–6kWh for a 4kW system.
Yes. Without solar, a battery charges from the grid at cheap off-peak rates (7p/kWh on tariffs like Octopus Go or Intelligent Go) and discharges during expensive peak hours (28p/kWh). This 'tariff arbitrage' can save £300–£500/year. The EcoFlow Delta Pro Ultra is particularly good for this as it needs no installation.
Most home batteries are warranted for 10–12 years and are expected to last 15–20 years in practice. GivEnergy offers a 12-year warranty, while most others offer 10 years. Battery capacity degrades slowly — expect 70–80% of original capacity after 10 years, similar to EV batteries.
No. Home batteries are classified as permitted development in England and Wales, so no planning permission is required. However, batteries over 3.68kW (most are) need a G99 grid connection application through your DNO, which your installer handles. This takes 45–65 working days.
GivEnergy is our top pick for most UK homes — it offers the best balance of price (£2,200–£2,800), reliability, and UK-based support with a 12-year warranty. Tesla Powerwall 3 is best for large homes needing maximum capacity. Sunsynk offers the best value per kWh at £1,800–£2,400.
Some can, but not all. The Tesla Powerwall 3 includes a built-in backup gateway for seamless switchover. GivEnergy offers an optional EPS (Emergency Power Supply) add-on. Most other batteries need additional hardware for backup capability. A 5kWh battery can power lights, fridge, and WiFi for 6–8 hours during an outage.
Without solar: £300–£500/year using off-peak tariff arbitrage. With solar: £500–£900/year by storing excess generation for evening use. With solar + smart tariff: £700–£1,100/year. Actual savings depend on your tariff, usage patterns, and battery size. Payback is typically 5–8 years.
DC-coupled batteries (like Tesla Powerwall 3) connect directly to solar panels via a hybrid inverter — they're more efficient (95%+) but require specific inverters. AC-coupled batteries (like GivEnergy with AC adapter) work with any existing solar system — slightly less efficient (90%+) but more flexible for retrofits.

Related Guides

G98 vs G99 Grid Connection

Which application does your battery need?

Battery Storage vs Solar Farm

How grid-scale BESS compares to home batteries

Battery Savings Calculator

See exactly how much you could save

Not Sure Which Battery to Choose?

Try our free calculator to see how much you could save based on your electricity bill and whether you have solar panels.

Calculate Your Savings