Independent Information Service
All specifications quoted are from manufacturer datasheets and official product pages. We do not rank these products — each has different strengths suited to different situations. Always consult a qualified installer for personalised recommendations.
Key Features to Compare
Capacity
How much energy it stores
Warranty
Manufacturer guarantee period
Efficiency
Round-trip energy retained
Monitoring
Real-time energy tracking
Backup
Power during grid outages
Tesla Powerwall 2
The most recognised name in home battery storage
According to Tesla's specifications, the Powerwall 2 is a 13.5kWh lithium-ion battery with an integrated inverter. It is one of the highest-capacity single-unit residential batteries available, designed for both solar self-consumption and backup power.
The Powerwall includes built-in backup functionality as standard, meaning it can automatically power your home during grid outages without additional hardware. According to Tesla, up to 10 units can be stacked for larger installations.
Manufacturer Specifications
GivEnergy All-in-One
Modular UK-based system with strong installer network
According to GivEnergy's specifications, the All-in-One system combines a hybrid inverter with modular battery storage in capacities from 5kWh to 13.5kWh. Being a UK-headquartered company, GivEnergy has an extensive UK installer network and responsive customer support.
The modular design means you can start with a smaller capacity and add more battery modules later as your needs grow. According to GivEnergy, the system is compatible with most solar panel installations and includes their monitoring portal as standard.
Manufacturer Specifications
Enphase IQ Battery
Compact, stackable microinverter-based system
According to Enphase specifications, the IQ Battery uses a unique microinverter architecture with individual 3.5kWh units that can be stacked to create larger systems. This approach means each battery unit is independently managed, which can improve overall system reliability.
The compact modular design makes it ideal for installations where space is limited, or where you want to start small and expand. According to Enphase, the system integrates seamlessly with their microinverter-based solar panel setups.
Manufacturer Specifications
Fox ESS
Budget-friendly option with a range of capacities
According to Fox ESS specifications, they offer a range of battery storage systems at competitive price points. Their hybrid inverter systems support various battery capacities, making them a popular choice for budget-conscious installations.
Fox ESS systems are widely available through UK installers and offer a solid monitoring platform. According to installer feedback, they represent good value for straightforward solar-plus-storage installations where premium features like built-in backup are not essential.
Manufacturer Specifications
SolaX
Good value hybrid systems with strong monitoring
According to SolaX specifications, their Triple Power battery range offers LFP chemistry in capacities from 3kWh to 12kWh, with modules that can be combined for larger systems. Their hybrid inverters are well-regarded for compatibility with a wide range of solar panel configurations.
SolaX offers a comprehensive monitoring platform through their SolaX Cloud portal, providing real-time data on generation, storage, and consumption. According to installer feedback, SolaX represents good value in the mid-range segment of the market.
Manufacturer Specifications
Side-by-Side Comparison
| Feature | Tesla Powerwall 2 | GivEnergy | Enphase IQ | Fox ESS | SolaX |
|---|---|---|---|---|---|
| Capacity | 13.5 kWh | 5-13.5 kWh | 3.5 kWh/unit | 2.5-12 kWh | 3-12 kWh |
| Warranty | 10 years | 12 years | 10 years | 10 years | 10 years |
| Efficiency | 90% | 95.8% | 96% | 92% | 93% |
| Inverter | Integrated | Integrated | Integrated | Separate | Separate |
| Backup Power | Built-in | Optional | Optional | Model dependent | Optional |
| Modular | Stackable units | Yes | Yes | Limited | Limited |
All specifications sourced from manufacturer datasheets. Specifications may vary by model and configuration. Confirm current specifications with your installer.
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