SolaX Power Review UK (2026)
Quick Answer
Popular hybrid specialist on UK roofs, X1 Hybrid range with built-in EPS backup and its own Triple Power battery.
Data verified April 2026. UK installed pricing varies with installer, site and package.
At a Glance
| Origin | China (founded 2012), focused hybrid and storage inverter manufacturer |
| UK support | Strong, established UK office, training and wholesaler network |
| Capacity / sizing | 3 kW – 7.5 kW single-phase (X1 Hybrid G4); three-phase X3 up to 15 kW |
| Efficiency | 97.8%+ peak |
| Warranty | 10 years standard on UK residential hybrids; extendable |
| Indicative UK price | £1,100–£2,200 installed |
Tariff Compatibility
SolaX Power works with the following UK export tariffs (see our best Octopus tariffs for solar guide):
- Octopus Flux (with SolaX battery)
- Outgoing Fixed
Strengths
- Very widely fitted UK hybrid, strong installer familiarity and parts availability
- Built-in EPS (Emergency Power Supply) gives backup power during a grid cut when paired with a battery
- Neat single-brand ecosystem with the stackable Triple Power (T-BAT) battery
- 10-year standard warranty on residential hybrids
Weaknesses
- Best value inside the SolaX ecosystem; third-party battery options are narrower than Sungrow
- String architecture, no panel-level shading mitigation
- Some older-generation units had firmware niggles, current G4 generation is much improved
- Not on the Intelligent Octopus Flux approved list
Who SolaX Power Suits Best
Mainstream UK PV-plus-battery installs wanting a proven hybrid with EPS backup and a tidy single-brand battery pairing.
When to Avoid
You want maximum third-party battery freedom (Sungrow or Solis), or panel-level shading control (SolarEdge or Enphase).
Popular Models
- X1 Hybrid G4 (single-phase, 3–7.5 kW)
- X3 Hybrid (three-phase)
- Triple Power T-BAT (stackable battery)
Frequently Asked Questions
Are SolaX inverters reliable?
Yes. SolaX is one of the most-fitted hybrid inverters in the UK with a dedicated UK office and good parts availability. The current X1 Hybrid G4 generation resolved most of the firmware issues that affected earlier models.
What is SolaX EPS?
EPS (Emergency Power Supply) is a backup feature on SolaX hybrid inverters that powers essential circuits during a grid outage, provided you have a compatible SolaX battery installed. Without a battery there is no blackout backup.
What battery works with SolaX inverters?
SolaX hybrids are designed around the SolaX Triple Power (T-BAT) stackable battery range. Some third-party batteries are supported on certain models, but the cleanest setup is the SolaX inverter-plus-battery ecosystem.
SolaX vs Sungrow, which is better?
Both are strong mid-market hybrids with 10-year warranties and large UK install bases. Sungrow offers broader third-party battery compatibility; SolaX has a tidy single-brand ecosystem with EPS backup. Choose by installer experience and battery preference.
Compare with Other Inverter Brands
| Brand | UK support | Warranty | Indicative price | |
|---|---|---|---|---|
| SolarEdge | Strong, established UK office and service network | 12 years on inverter; 25 years on optimisers | £1,800–£3,200 installed (includes optimisers per panel) | View → |
| Enphase | Strong, dedicated UK distribution and installer network | 25 years on microinverters (among the longest in the market) | £2,500–£4,000 installed on a typical 4 kW system, adds ~£200/panel vs string | View → |
| Sungrow | Strong, UK office and established service network | 10 years standard (extendable to 20 years) | £1,200–£2,200 installed | View → |
| Fronius | Moderate, Europe-wide service with UK distributor support | 10 years standard; extendable to 20 | £1,500–£2,800 installed | View → |
| Growatt | Growing, UK distribution via major wholesalers, established installer base | 5–10 years standard (varies by model); extendable to 15 years | £700–£1,800 installed, among the cheapest hybrid options | View → |
| Solis | Strong, established UK office, technical support line and wholesaler network | 5 years standard, free extension to 10 years on most UK residential models when registered | £900–£2,000 installed | View → |
| SMA | Moderate, long UK market presence via distributors with manufacturer technical backup | 5 years standard; extendable to 10, 15 or 20 years | £1,300–£2,600 installed | View → |
| GoodWe | Growing, UK distribution via major wholesalers with manufacturer support | 10 years standard on UK residential hybrids; extendable to 20 years | £1,100–£2,100 installed | View → |
| Huawei | Moderate, UK distribution via specialist wholesalers and accredited installers | 10 years standard on inverter; extendable; LUNA 2000 battery 10 years | £1,400–£2,600 installed (more with optimisers) | View → |
| Tigo | Moderate, UK distribution via wholesalers and accredited installers | 25 years on TS4 optimisers | £25–£60 per optimiser plus a TAP gateway; far cheaper than full SolarEdge when only some panels are shaded | View → |
Get a Quote Including SolaX Power
Most MCS-certified installers carry multiple inverter brands — ask for a quote specifying SolaX Power if you want a system with this inverter. 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.