String vs Microinverters: Which is Right for UK Commercial Solar?
Technical comparison — string inverter (Sigenergy, Fox, Sungrow) vs microinverter (Enphase) for UK commercial solar.
The side-by-side comparison
Our verdict
Microinverters are 50–100% more expensive per kW on commercial scale. For commercial solar, the math almost always favours string inverters — even with SolarEdge optimisers for per-panel monitoring you stay cheaper. Microinverters genuinely win on heavily shaded residential or tiny commercial roofs where shading losses would exceed inverter cost difference.
Real KMM installs
Every case study below is a real KMM customer with measured Year 1 generation, real payback maths and named project manager.
Doctors' Surgery Solar Rescue: 100kW + Battery Backup
A Market Deeping doctors' surgery had been let down by a previous solar installer — non-stop issues, no monitoring, zero confidence. KMM installed 100kW solar, 100kW battery, Tigo optimisers on every panel.
UK Farm Solar Case Study: 3-Year Payback
UK farm sized its solar at 50,000 kWh against 37,000 kWh usage to future-proof. KMM modelled a 3-year 3-month payback and roughly £500k of 30-year savings.
UK Farm Solar: Cutting Energy Costs on a Dryer
UK farm with grid-only power and a summer grain dryer turned to solar to harness rising energy costs, drive its dryer, and earn export income.
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