Solar Battery Brands Comparison
Compare the leading home battery storage options available in the UK. Find the right battery to maximise your solar self-consumption.
Understanding Battery Specifications
Capacity (kWh)
How much energy the battery can store. A typical UK home uses 8-10 kWh per day. Consider your evening/overnight usage when sizing.
Usable Capacity
Most batteries can't be fully discharged. Look for usable capacity, typically 90-100% of stated capacity for LFP batteries.
Warranty
Usually 10-15 years or a set number of cycles/throughput. LFP batteries typically last 4,000-6,000 cycles before degrading to 70-80%.
Round-trip Efficiency
Energy lost during charge/discharge cycles. Higher is better. Modern batteries achieve 90-96% efficiency.
Top Battery Brands
Tesla Powerwall
USA
£8,500 - £10,500
Specifications
Capacity
13.5 kWh
Warranty
10 years
Efficiency
90%
Key Features
- Premium brand recognition
- Sleek integrated design
- Excellent app and monitoring
- Weather-responsive features
Best For
Tech enthusiasts, premium installations
GivEnergy
UK
£2,500 - £5,500
Specifications
Capacity
2.6 - 9.5 kWh (stackable)
Warranty
12 years / 6,000 cycles
Efficiency
96%
Key Features
- UK-based company with local support
- Excellent value for money
- Modular and expandable
- Compatible with most inverters
Best For
Value-focused buyers, flexibility
Enphase IQ Battery
USA
£5,000 - £9,000
Specifications
Capacity
3.5 - 10.5 kWh (modular)
Warranty
15 years / 4,000 cycles
Efficiency
96%
Key Features
- Microinverter integration
- Modular scalable design
- No single point of failure
- Industry-leading warranty
Best For
Enphase solar systems, reliability focus
Pylontech
China
£1,800 - £4,500
Specifications
Capacity
2.4 - 9.6 kWh (stackable)
Warranty
10 years / 6,000 cycles
Efficiency
95%
Key Features
- Very affordable
- Widely compatible
- Proven reliability
- Easy to expand
Best For
Budget-conscious buyers
SolarEdge Home Battery
Israel
£4,500 - £12,000
Specifications
Capacity
4.6 - 23 kWh
Warranty
10 years
Efficiency
94.5%
Key Features
- Integrated with SolarEdge inverter
- DC-coupled for efficiency
- Smart energy management
- Compact design
Best For
SolarEdge system owners
BYD Battery-Box
China
£3,000 - £7,000
Specifications
Capacity
2.5 - 12.8 kWh (modular)
Warranty
10 years
Efficiency
96%
Key Features
- World's largest EV battery maker
- Modular cobalt-free chemistry
- High safety standards
- Wide compatibility
Best For
Eco-conscious buyers, flexibility
LFP vs NMC: Battery Chemistry
- +Longer lifespan (4,000-6,000 cycles)
- +Safer chemistry, more stable
- +Better at high temperatures
- +Cobalt-free, more ethical
- -Lower energy density
- -Heavier for same capacity
Most UK installers now recommend LFP for home storage
- +Higher energy density
- +Lighter and more compact
- +Better cold weather performance
- -Shorter lifespan (2,000-3,000 cycles)
- -Requires more cooling
- -Contains cobalt
Still used in Tesla Powerwall and some premium systems
What Size Battery Do You Need?
Small System
Covers essential evening usage. Good for smaller homes or lower budgets. Pairs with 3-4kW solar system.
Most PopularRecommended
Covers most overnight usage for average UK home. Good balance of cost and utility. Pairs with 4-6kW system.
Large System
Maximum self-consumption and backup power. For larger homes, EVs, or off-grid aspirations. Pairs with 6kW+ system.