Solar Inverter Comparison: String vs Hybrid vs Micro
Your inverter converts solar electricity for your home. Here's which type is right for you.
Quick Answer
For most UK homes, a Huawei, GivEnergy, or Solis hybrid inverter (£700–£1,600) is the best choice — it handles solar, battery, and export in one unit. Choose SolarEdge optimisers for shaded roofs, or Enphase microinverters for complex roof layouts. All major brands offer 10–12 year warranties; Enphase microinverters go to 25 years.
What's the Difference Between String, Hybrid, and Microinverters?
The three main inverter types used in UK solar installations are string/hybrid inverters, optimiser-based systems, and microinverters. Each handles the DC-to-AC conversion differently and suits different roof configurations. The table below compares them across cost, shading performance, monitoring, and warranty.
| Feature | String / Hybrid | Optimiser-Based | Microinverter |
|---|---|---|---|
| Example | Huawei, Solis, GoodWe | SolarEdge | Enphase |
| Typical cost | £500–£1,500 | £1,200–£2,000 + £35–£60 per panel | £150–£200 per panel |
| Efficiency | 96–98% | 99% (optimiser + inverter) | 96–97% |
| Best for | Single roof face, no shading | Partial shading, multiple orientations | Complex roofs, maximum per-panel monitoring |
| Battery-ready | Hybrid models only | With compatible battery | Via AC-coupled battery |
| Panel monitoring | System-level only | Per-panel via optimisers | Per-panel built-in |
| Lifespan | 10–15 years | 10–15 years (optimisers 25yr) | 25 years |
| Failure impact | Whole system stops | Affected panel reduced, rest continues | Only affected panel stops |
Which solar inverter brands are available in the UK?
Huawei SUN2000
Most PopularHybrid Inverter
Market leader in the UK with the largest share of residential installations. The SUN2000 hybrid inverter pairs seamlessly with the Huawei Luna2000 battery for a fully integrated ecosystem. Excellent monitoring via the FusionSolar app, which shows real-time generation, consumption, and export data. Most UK installers recommend Huawei as their default choice.
Solis
Best ValueHybrid Inverter
The best-value hybrid inverter on the UK market. Solis offers reliable performance with a 10-year warranty at a lower price point than Huawei. Compatible with multiple third-party battery brands, giving you more flexibility. A solid choice when budget is the priority but you still want battery-ready capability.
GivEnergy
UK-MadeHybrid Inverter
UK-designed hybrid inverter that has become a favourite among British installers thanks to strong local support and tight integration with GivEnergy's own battery range and the GivEnergy Gateway for backup power. The all-in-one ecosystem (inverter, battery, EV charger, app) is one of the simplest on the market. Competitive pricing and responsive UK-based customer service.
SolarEdge
Best for ShadingOptimiser-Based
An optimiser-based system where each panel gets a dedicated power optimiser that feeds into a central inverter. If one panel is shaded by a chimney, dormer, or tree, the rest continue at full output instead of being dragged down. Best for partially shaded roofs or homes with panels facing multiple directions.
Enphase
Longest WarrantyMicroinverter
A microinverter system with one small inverter installed on each individual panel, converting DC to AC right at the source. No single point of failure. If one unit fails, only that panel is affected. Provides the best per-panel monitoring and maximum flexibility for complex roof layouts with multiple orientations.
GoodWe
Battery FlexibleHybrid Inverter
A mid-range hybrid inverter that works well with multiple third-party battery brands including BYD, Pylontech, and Alpha ESS. GoodWe offers competitive pricing and solid monitoring software. A practical choice if you want flexibility to choose your battery brand independently of your inverter.
Fronius
Premium BuildString / Hybrid Inverter
A premium Austrian manufacturer known for exceptional build quality and advanced monitoring via the Fronius Solar.web platform. Particularly popular with commercial and larger residential installations. The Symo and Primo ranges are well-established in the European market and come with strong after-sales support.
Which Inverter Should You Choose?
The right inverter depends on your roof layout, shading, budget, and whether you want a battery. Most UK homes with a single south-facing roof do best with a hybrid inverter. Use the scenarios below to find the best match for your situation.
Single south-facing roof, no shading
String/Hybrid (Huawei or Solis)
The simplest and most cost-effective option. A standard hybrid inverter handles this setup perfectly.
Want a battery now or later
Hybrid (Huawei SUN2000 + Luna)
Huawei's ecosystem offers the tightest integration between inverter and battery. The Luna battery plugs directly into the SUN2000.
Partial shading or east/west split roof
Optimiser (SolarEdge) or Micro (Enphase)
Panel-level optimisation ensures shaded or differently-oriented panels don't drag down the whole system's output.
Budget is the priority
String (Solis)
Solis offers reliable performance with a 10-year warranty at the lowest price point. A solid choice when budget matters most.
Maximum monitoring and flexibility
Micro (Enphase)
Per-panel microinverters give you granular monitoring and the ability to expand your system one panel at a time. 25-year warranty.
What size inverter do I need for my solar panels?
Match inverter capacity to your array within a 0.9–1.2 DC:AC ratio. A 4.4 kWp array (10 × 440W panels) pairs best with a 3.6–5 kW inverter. Mild oversizing of the array (DC:AC of 1.1–1.2) is common in the UK because panels rarely hit their nameplate rating in British weather — this captures more of the annual generation curve without significant clipping.
| Array size | Typical panel count | Recommended inverter |
|---|---|---|
| 2.2 kWp | 5 × 440W | 2–2.5 kW |
| 3.5 kWp | 8 × 440W | 3–3.6 kW |
| 4.4 kWp | 10 × 440W | 3.6–5 kW |
| 5.3 kWp | 12 × 440W | 5 kW |
| 7 kWp+ | 16+ × 440W | 6–8 kW (often 3-phase) |
Note: residential single-phase inverters in the UK are capped at 3.68 kW for G98 connection. Above that your installer will need a G99 DNO application — no cost to you beyond the installer's admin fee.
Frequently Asked Questions About Solar Inverters
What's the difference between a string and hybrid inverter?
A string inverter only converts solar DC to AC. A hybrid inverter also manages battery charging and discharging. If you want a battery now or in the future, choose a hybrid inverter.
Is Huawei or Solis better?
Huawei is the market leader with better ecosystem integration (especially with the Luna battery). Solis is a solid budget alternative. Both are reliable. Choose Huawei if you plan to add a battery; Solis if cost is the main factor.
Do I need a microinverter?
Most UK homes don't need microinverters. They're beneficial if your roof has significant shading, faces multiple directions, or if you want per-panel monitoring. For a standard south-facing roof, a string or hybrid inverter is more cost-effective.
How long do solar inverters last?
String and hybrid inverters last 10-15 years and will likely need one replacement during your panel's 25-30 year lifespan. SolarEdge optimisers and Enphase microinverters are warrantied for 25 years.
How much does it cost to replace a solar inverter?
Budget £800–£1,500 for a mid-range string or hybrid inverter replacement including labour. SolarEdge and Enphase systems rarely need full replacement within 25 years thanks to their longer warranties. Factor one inverter replacement into your 25-year ROI calculations.
What size inverter do I need?
Match inverter AC capacity to around 83–110% of your array's DC rating. A 4.4 kWp array pairs with a 3.6–5 kW inverter. Single-phase UK residential installs are capped at 3.68 kW for G98; above that a G99 DNO application is required.
Is GivEnergy a good inverter brand?
Yes. GivEnergy is UK-designed with strong local support and one of the tightest ecosystems (inverter, battery, EV charger, app, backup gateway). It's a popular choice for homeowners who value UK-based warranty support and an all-in-one setup.
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Sources
- MCS — Microgeneration Certification Scheme — mcscertified.com
- Huawei — SUN2000 Residential Smart PV — solar.huawei.com
- SolarEdge — Residential Solutions — solaredge.com
- Enphase — Microinverter Technology — enphase.com
- Solis — Hybrid Inverters — solisinverters.com
Last updated: May 2026
Fact-checked by John Rooney, Solar Energy Editor. Editorial policy
John Rooney is the founder of Solar Info and has been covering the UK solar energy market since 2023. He fact-checks all content against official MCS and Ofgem data and maintains relationships with MCS-certified installers across the UK.
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