Best Microinverters for UK Plug-In Solar (2026)

Quick read: for most UK 800W plug-in kits, the Hoymiles HMS-800W-2T is the industry-standard reference inverter and the easiest to source. EcoFlow STREAM bundles its integrated microinverter inside a complete kit. Deye is a strong third option with growing UK distribution. Enphase IQ7 is the premium choice but routes through electrical wholesalers, not consumer channels.

What is a microinverter, in 90 seconds

Solar panels generate direct current. UK homes use alternating current at 230V, 50Hz. A microinverter sits next to the panel, converts on the spot, and outputs AC ready to go straight into a circuit. For UK plug-in solar specifically, the microinverter decides three things: how much power the system can put out, whether it stops outputting when the grid goes off (anti-islanding, an ENA EREC G98 requirement), and whether your installer can submit a connect-and-notify G98 form on it.

The four microinverters UK buyers can actually get

List cut to inverters that are (a) currently sold to UK consumers in 2026, (b) on the ENA G98 type-test register or have a clear UK G98 route, and (c) have an active distribution channel. Four make the cut:

Microinverter	AC output	G98 type-test	Monitoring	UK availability
Hoymiles HMS-800W-2T Two-input 800W microinverter. The de-facto reference for UK two-panel plug-in kits. Latest price on Amazon UK →	800W 230V single-phase	On register Verify on the ENA G98 register	S-Miles app Per-panel data via DTU	Wide Amazon UK, multiple installers
EcoFlow STREAM 800W (integrated) Microinverter built into the EcoFlow STREAM kit. Latest price on Amazon UK →	800W 230V single-phase	On register EcoFlow lists G98 compliance for UK STREAM SKU	EcoFlow app Whole-kit including STREAM Pro battery if fitted	Wide Amazon UK, EcoFlow direct
Deye SUN80G3-EU-Q0 / SUN-M-G4 Used by several European balcony-solar brands. Growing UK distribution. Manufacturer site →	800W EU spec also runs at 600W	Listed Verify exact SKU on ENA register	SOLARMAN Smart Or in-app via partner brand	Specialist Less consumer-channel presence than Hoymiles
Enphase IQ7 / IQ8 (UK SKUs) Premium per-panel microinverters. UK route is electrical wholesale. Manufacturer site →	290 to 384W per panel String multiple to scale	On register UK-specific IQ7-3-72-2-INT and similar SKUs	Enphase Enlighten Industry-grade per-panel data	Trade Through CPS-electrician suppliers, not Amazon

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How to verify a microinverter on the ENA G98 register before you buy

Three minutes of due diligence saves your installer a phone call to the DNO. The ENA G98 type-test register is the public list of inverters approved for connect-and-notify in the UK. If your inverter is not on it, your DNO can refuse the G98 form, and the install reverts to the longer G99 route.

Open the ENA Industry Hub Resource Library and search "G98".
Find the current EREC G98 Type-Tested register spreadsheet.
Search the manufacturer's exact SKU. Mind the suffix: HMS-800W-2T is not the same as HMS-800W. UK SKUs sometimes carry an extra -INT or -EU tag.
Note the manufacturer's reference number, you'll need it for the G98 Form B "Manufacturer's Ref No" field.

Output, anti-islanding, monitoring: what the spec actually means

AC output

For UK plug-in solar in 2026 the working number is 800W per phase. Sits comfortably under G98's 16A-per-phase ceiling and matches EU plug-in policy. Anything above 800W is for hardwired multi-panel systems, not plug-in.

Anti-islanding

Islanding is when a generator keeps energising a section of grid after the grid itself is dead. Bad for engineers working on the line. Anti-islanding is the protection that disconnects the inverter when grid voltage or frequency leave a safe band. Every microinverter above includes it as a G98 baseline.

Monitoring

The app is mostly a comfort feature, but it serves one practical purpose: it tells you when the inverter has stopped exporting. For a plug-in setup behind a flat door you do not check daily, that matters more than on a roof you can see.

Which one for which UK situation

Renter on a balcony, no installer relationship: EcoFlow STREAM. Single-box experience.
Two south-facing panels, mid-budget, want the industry-standard inverter: Hoymiles HMS-800W-2T paired with two 400W panels.
You like SOLARMAN, want the cheapest unit on the register: Deye, but verify the exact SKU on the G98 register before buying.
Going through a CPS-certified electrician anyway and want decade-grade reliability: ask them about Enphase IQ7 / IQ8.

What this page is not: a plug-in solar legality argument. The microinverter is one component. The compliant install route still requires a CPS-certified electrician with a hardwired connection and G98 notification. See BS 7671 and Plug-In Solar in the UK for the regulatory picture, and the G98 form walkthrough for the paperwork.