SolaX Power Review UK (2026)
Quick Answer
Mid-market modular battery with broad hybrid inverter integration, popular with UK installers.
Data verified April 2026. UK installed pricing varies with installer, site and package.
At a Glance
| Origin | China (founded 2012), significant UK market share via established distribution |
| UK support | Strong, UK office, good spares availability, active installer community |
| Capacity / sizing | 4.5–25 kWh (modular) |
| Chemistry | LFP (lithium iron phosphate) |
| Peak power | 5 kW continuous (most models) |
| Warranty | 10 years / 60% end-of-life capacity |
| Cycles | 6,000+ |
| Indicative UK price | £3,800–£10,500 installed |
Tariff Compatibility
SolaX Power works with the following UK export tariffs (see our best Octopus tariffs for solar guide):
- Octopus Flux (with compatible SolaX inverter)
- Outgoing Fixed
Strengths
- Tight integration with SolaX hybrid inverters, common bundle in UK installs
- Modular HV architecture lets you scale capacity after install
- Competitive pricing, usually £500–£1,000 less than GivEnergy for similar kWh
- Strong UK installer network and training programme
Weaknesses
- 60% end-of-life capacity (vs 70% on GivEnergy and FoxESS) means faster degradation warranty
- App (SolaX Cloud) is functional but dated compared to Tesla or GivEnergy
- Less-known brand than Tesla, some resale friction when selling the house
Who SolaX Power Suits Best
Mid-market installs where the installer already has a SolaX partnership. Good value when paired with a SolaX hybrid inverter as a matched system.
When to Avoid
You want the longest warranty percentage or highest resale recognition, GivEnergy or Tesla are stronger on both.
Popular Models
- Triple Power HV (T30, T58)
- T-BAT H 5.8 (modular)
- T-BAT SYS-HV-S36 (three-phase-capable)
Frequently Asked Questions
How much does a SolaX battery cost in the UK?
A SolaX battery costs £3,800–£10,500 installed depending on capacity. A 5.8 kWh T-BAT H typically runs £4,500–£5,500 installed; a 10 kWh modular stack sits around £8,000–£9,500.
Is SolaX compatible with Octopus Flux?
SolaX hybrid inverters paired with SolaX batteries work with Octopus Flux and Flexible Octopus. Intelligent Octopus Flux approval depends on the specific inverter model, check the latest Octopus approved list.
What is the SolaX warranty?
10 years with 60% end-of-life capacity. Shorter end-of-life capacity guarantee than GivEnergy (70%) and FoxESS (70%) but the 10-year time period is standard for the UK market.
Can SolaX batteries provide backup during a power cut?
Most SolaX hybrid inverters support Emergency Power Supply (EPS) mode with the battery, automatically isolating from the grid and powering selected circuits during an outage.
Compare with Other Battery Brands
| Brand | UK support | Warranty | Indicative price | |
|---|---|---|---|---|
| FoxESS | Extensive, dedicated FoxESS UK office, established installer network | 10 years / 70% end-of-life capacity | £3,500–£9,500 installed depending on capacity | View → |
| Pylontech | Moderate, distributor-led UK support rather than direct | 10 years / 80% end-of-life (Force-H); 7 years (US-series) | £3,000–£11,000 depending on stack size and inverter pairing | View → |
| Sunsynk | Strong, UK distributor network with established service channel | 10 years | £2,800–£8,500 installed | View → |
| Alpha ESS | Moderate, growing UK distributor and installer network | 10 years / 70% end-of-life | £5,000–£12,000 installed for integrated battery + hybrid inverter | View → |
| Sonnen | Strong, UK office, dedicated service team, approved installer network | 10 years or 10,000 cycles (whichever comes first), one of the longest in the UK market | £8,000–£16,000 installed, premium tier | View → |
| LG Energy Solution (LG Chem) | Limited, LG withdrew from UK residential in 2022; service only for existing installations | 10 years / 60–70% end-of-life (varies by model) | Second-hand £2,000–£5,000, new units unavailable in UK | View → |
| Powervault | Strong, UK design, UK support team, limited but focused installer network | 10 years / 70% end-of-life capacity | £4,500–£11,000 installed | View → |
| Tesla Powerwall | Strong, Tesla-certified installer network and direct app support | 10 years / 70% end-of-life capacity | £8,500–£11,500 installed (Powerwall 3 with integrated inverter) | View → |
| BYD | Moderate, distributor-led UK support with strong installer familiarity | 10 years / 60% end-of-life capacity | £3,200–£11,000 depending on stack size and inverter pairing | View → |
| Huawei LUNA 2000 | Moderate, distributor and accredited-installer support | 10 years | £4,500–£10,500 installed (with Huawei SUN2000 inverter) | View → |
| Enphase IQ Battery | Strong, dedicated Enphase UK distribution and installer network | 15 years (one of the longest battery warranties in the UK) | £4,000–£11,000 installed depending on number of units | View → |
| SolarEdge Energy Bank | Strong, established SolarEdge UK office and service network | 10 years | £4,500–£9,500 installed (requires SolarEdge Home Hub inverter) | View → |
Get a Quote Including SolaX Power
Most MCS-certified installers carry multiple battery brands — ask for a quote specifying SolaX Power if you want a battery system. Use the form below to reach local installers.
Sources
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He researches every battery and inverter brand against manufacturer datasheets, MCS and Ofgem data, and feedback from the MCS-certified installers in our directory before publishing.