Growatt Review UK (2026)
Quick Answer
China's largest residential inverter brand, best-value hybrid inverter with broad battery compatibility.
Data verified April 2026. UK installed pricing varies with installer, site and package.
SolarInfo.uk editorial rating (out of 5)
Our verdict: The value pick. Growatt is one of the cheapest ways onto a UK roof and its hybrids are widely fitted, so parts and installer familiarity are good. It sits at 3.5 because warranty terms and long-run reliability trail Sungrow and SolaX, which are worth the modest step up for most buyers planning to keep the system 15+ years.
At a Glance
| Origin | China (founded 2011), world's largest residential inverter maker by volume |
| UK support | Growing, UK distribution via major wholesalers, established installer base |
| Capacity / sizing | 1 kW – 15 kW single-phase; three-phase available |
| Efficiency | 97.5%+ peak; ~96% European-weighted |
| Warranty | 5–10 years standard (varies by model); extendable to 15 years |
| Indicative UK price | £700–£1,800 installed, among the cheapest hybrid options |
Tariff Compatibility
Growatt works with the following UK export tariffs (see our best Octopus tariffs for solar guide):
- Octopus Flux (with compatible battery)
- Outgoing Fixed
Strengths
- Lowest cost hybrid inverter on the UK market, typically £300–£600 cheaper than Sungrow or GoodWe
- Broad battery compatibility, Growatt, Pylontech, BYD, and many others
- Full MCS-approved range for UK residential installations
- Simple ShinePhone monitoring app with system-level data
Weaknesses
- Shorter standard warranty (5 years on some models) than Sungrow or Fronius
- Build quality considered mid-tier, some UK installers prefer Sungrow or SolaX for long-term reliability
- Customer service response times have been mixed in Trustpilot reviews
- Not part of the Intelligent Octopus Flux scheme, so peak-rate exports have to be timed manually
Who Growatt Suits Best
Budget-conscious installs where warranty length is less critical than upfront cost. Common choice on tight-margin quotes and new-build solar.
When to Avoid
You value long-term warranty and brand reliability, step up to Sungrow or SolaX for £300–£500 more.
Popular Models
- MIN TL-XH series (3–6 kW string)
- MOD TL3-XH (three-phase)
- SPH hybrid (3–10 kW with battery support)
Frequently Asked Questions
Are Growatt inverters any good?
Yes for price-sensitive installs, Growatt is the world's largest residential inverter maker and its products are MCS-approved and widely used in the UK. Mid-tier build quality vs premium brands like Sungrow or Fronius, but a fraction of the cost.
How long is the Growatt warranty?
Standard warranty is 5–10 years depending on model. It is extendable to 10 or 15 years with paid extensions. Shorter than Sungrow (10 years standard) and far shorter than Enphase (25 years).
Does Growatt work with Pylontech batteries?
Yes. Growatt SPH hybrid inverters are well-tested with Pylontech, BYD, and Growatt's own batteries. It is one of the most flexible inverters for battery choice in the UK.
Growatt vs GoodWe, which is better?
GoodWe has a slightly better build reputation and warranty structure (10 years standard). Growatt is cheaper and has broader battery compatibility. For a first-time installer-choice, GoodWe is marginally preferable; for price-sensitive installs, Growatt wins.
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 → |
| 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 → |
| Fox ESS | Strong, dedicated Fox ESS UK operation, wide wholesaler stock, and an active UK owners' community | 5 years standard, extended to 10 years with free online registration | £1,000–£1,800 installed | View → |
| SolaX Power | Strong, established UK office, training and wholesaler network | 10 years standard on UK residential hybrids; extendable | £1,100–£2,200 installed | 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 → |
Find a Growatt Installer Near You
Growatt is supplied and fitted by MCS-certified installers, not sold direct, so the best route is to find a local MCS installer and ask whether they fit Growatt (most carry several inverter brands, or can order it in). MCS certification keeps you eligible for 0% VAT and, for solar and battery, the Smart Export Guarantee.
Compare Growatt installers by browsing MCS-certified installers by county, check each company's reviews, or request quotes below to be matched with installers covering your area.
Not listed? See all UK counties — we cover installers across England, Scotland, Wales and Northern Ireland.
Get a Quote Including Growatt
Most MCS-certified installers carry multiple inverter brands — ask for a quote specifying Growatt 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.