Balcony Solar in the United Kingdom

Last verified: 2026-05-02 · Sources: Ofgem, ENA, gov.uk, MCS, supplier T&Cs

Why there's no "UK 800 W rule"

Continental Europe has been simplifying balcony PV since 2019: Germany's Solarpaket I, the EU NC RfG harmonisation in Austria/Netherlands/Italy, and France's «Plug & Play» framework. The UK never built one. There's no consultation paper from BEIS / DESNZ on plug-in solar; there's no draft supplement to G98; Ofgem's SEG documentation doesn't mention balcony installations as a recognised category.

That isn't the same as it being illegal. A balcony kit at 800 W AC continuous output sits well below the G98 threshold, so the connection itself is fine under existing engineering recommendations. What you give up — compared with a German owner — is the registry pathway, the VAT exemption, the SEG export income, and the tenant rights. Most of the gap is policy inertia rather than active hostility.

Engineering Recommendation G98 — what actually applies

G98 (the current ENA recommendation, replacing G83 in 2018) governs the connection of small generators to the public low-voltage network. It applies to single-phase generators up to 16 A per phase — which covers any 800 W microinverter several times over (an 800 W inverter pulls only ~3.5 A at 230 V). Above 16 A, the bigger sibling G99 kicks in and requires DNO pre-approval; G98 only requires notification within 28 days of energising the system.

For a balcony kit this means:

• Plug in the kit. The microinverter does the soft-start and grid-sync automatically.
• Within 28 days, send a G98 notification to your DNO. Each of the six GB DNOs has its own online form; you can find yours via energynetworks.org/customers/find-my-network-operator.
• You will need: inverter manufacturer + model + G98 type-test certificate (every UK-sold inverter has one — Hoymiles HMS-800W-2T, Enphase IQ8, etc. ship with the G98 cert). Most kit retailers attach the cert PDF to the kit listing.
• DNOs respond within ~30 working days. The response is confirmation, not approval. They cannot retroactively block a G98 install — only flag it for inspection if something looks wrong.

The notification step is non-optional but functionally toothless: failing to notify is a breach of the DNO's connection agreement, but enforcement against private balcony systems has been zero. The practical reason to do it: it locks in your installation date so an insurer can't later claim the system was "unauthorised."

VAT: 0% on installations, 20% on kits you plug in yourself

The headline UK incentive is the 0% VAT rate on residential solar PV from 1 April 2022 through 31 March 2027, set by the Value Added Tax (Installation of Energy-Saving Materials) Order 2022. It dropped the rate from 5% to 0% for an initial five years; an extension is widely expected but not yet legislated.

The catch: the 0% rate applies to the supply and installation as a single service. An MCS-certified installer fitting a 4 kWp rooftop array charges 0% VAT on the whole job. A balcony kit you buy from Amazon UK or a manufacturer's direct-to-consumer storefront is a hardware sale, not an installation — so it attracts the standard 20% VAT.

You can capture the 0% rate if you book an MCS-certified electrician to fit the kit and they invoice you for both the hardware and the labour as one line. In practice almost no electrician does this for a 800 W balcony kit (the labour fee dwarfs the VAT saving), so the 20% sticks for ~99% of UK balcony purchases.

Smart Export Guarantee: why your balcony kit usually earns nothing

The Smart Export Guarantee (SEG), launched 1 January 2020 as the successor to the Feed-in Tariff (FiT closed to new applicants 31 March 2019), obliges any electricity supplier with more than 150,000 domestic customers to offer at least one export tariff above zero pence per kWh. The economics for solar PV up to 5 MW are governed by Ofgem.

Two structural problems for balcony kits:

• MCS gate. Almost every SEG-licensee in practice requires the installation to be certified under the Microgeneration Certification Scheme (MCS). MCS certification is performed by an accredited installer, costs ~£300-500, and requires the installer to physically inspect and sign off the system. MCS does not cover unattended plug-in PV: the scheme's definition of an "installation" assumes a fixed mount, an isolator switch, and a labelled consumer-unit connection — none of which a Schuko-plugged balcony kit has. So a balcony kit cannot be MCS-certified in the standard scheme, which means most SEG suppliers will reject the application.
• Smart-meter gate. SEG payments are calculated from half-hourly export data delivered by a smart meter (SMETS1 or SMETS2). Households without a smart meter can't claim SEG at all. ~70% of GB households had a smart meter by end of 2025; roughly 30% are still on legacy meters.

For comparison, the actual SEG rates if you could get certified:

Rates above are typical of late-2025; suppliers re-quote quarterly. Octopus Outgoing Fixed at 12p/kWh isn't the highest published rate, but it's the most operationally reliable — the others change frequently and several have closed to new applicants for periods during 2024-2025. The canonical list of currently-licensed SEG suppliers is on Ofgem's SEG Licensees page.

Bottom line for balcony PV: assume your export earns zero. Optimise for self-consumption — install when you're actually home, add a 1-2 kWh battery to time-shift midday surplus into evening load, run heavy appliances on smart plugs that switch on with sunshine.

Building rules: PD, post-Grenfell, and high-rise blocks

Three layers stack on top of the connection rules:

1. Permitted Development Rights (England)

Most rooftop solar on a single-family dwelling is permitted development under the Town and Country Planning (General Permitted Development) Order, subject to height limits (panels can't protrude more than 200 mm above the roof slope on a flat or pitched roof). For a balcony kit attached to a balcony rail or a garden mount, this generally falls outside the "solar PV" PD wording (which contemplates roof installations) but inside the "general curtilage" PD rules: a small, non-structural fixture is fine without planning permission. Listed buildings and properties in conservation areas need explicit planning consent regardless.

2. Post-Grenfell building regulations

The Building Safety Act 2022 and the Approved Document B (Fire Safety) updates that followed the Grenfell Tower fire restrict combustible exterior materials on residential buildings above 18 m or 7 storeys. The intent was to ban exterior cladding of the kind used at Grenfell. The unintended scope: most balcony PV mounts are aluminium with plastic cable trays, and many freeholder insurers, council leasehold-management arms, and individual building managers extend the "no combustible exterior fixings" reading to all PV-on-balcony installations on tall blocks by default.

If you live in a flat above 18 m, expect a written objection from your freeholder — and budget for an architect's fire-safety statement (£1,000-2,000) if you want to push back. Below 18 m, balconies in purpose-built blocks generally aren't restricted, but read your lease and the freeholder's alterations clause carefully before buying.

3. Insurance

Buildings insurance for a leasehold flat usually requires the freeholder to be informed of any external alterations. Some insurers exclude solar-PV-related claims unless the install was MCS-certified. Read your policy alterations clause; if it says "you must inform us in writing of any external changes," send the email even if you're sure they don't care — the email is the audit trail if a claim ever arises.

Tenants: weaker rights than Germany

UK landlord-and-tenant law, unlike the German BGB § 554 amendment, does not grant tenants a positive right to install solar PV. The default position in any standard assured shorthold tenancy (AST) or long lease is that any external alteration requires the landlord's written consent. Refusing consent on aesthetic grounds is permitted; only a complete failure to engage with a request can be challenged at the First-tier Tribunal.

Practical paths:

• Non-invasive mounts only. A bracket that clamps over a railing without drilling, and a cable that exits via an existing weep-hole or window-vent, sidesteps the "structural alteration" objection in most leases. The lease usually still requires written consent, but consent is harder to refuse for a fully reversible install.
• Re-frame as "temporary equipment." Some landlords are happier permitting "a temporary outdoor appliance, removable on demand" than "a solar PV system." The language matters — leases distinguish between fixtures (permanent) and chattels (removable).
• Get the email. Verbal consent from your landlord is worth nothing if you have a dispute later. Send a written request with photos of the proposed install and a clear "please confirm by email if you have no objection."

Top kits available in the UK

UK distribution is thinner than the German channel. Most balcony kits are imported directly from EU manufacturers under the EU-UK Trade and Cooperation Agreement; UK-specific kits are rare. Watch for:

• EcoFlow PowerStream — 800 W microinverter sold via uk.ecoflow.com with G98-compliant firmware. Pairs with EcoFlow batteries for time-shifting. Requires you to BYO panels (Renogy, Bluetti, etc).
• Anker SOLIX Solarbank 2 — full-system kit (panels + microinverter + 1.6 kWh battery) with G98 certification. Sold direct via anker.com/uk-en.
• Bluetti AC180/AC300 with optional PV input — not a balcony kit per se, but increasingly used as a portable equivalent that can be plugged into a balcony panel and used as a standalone power supply (no grid feedback, so no G98 notification needed).
• Yuma kits ship from France into the UK under the TCA (no customs duty, but VAT due on import). The two-panel 900 Wp kit lands at ~£780 inc. VAT and shipping.

Browse the full balcony catalog; UK shipping is supported by all Yuma SKUs and a subset of Priwatt's post-2024 inventory.

FAQ

Is a balcony solar kit legal in the UK?

Yes — there's no specific law banning it. The connection falls under G98 (which permits any single-phase generator ≤ 16 A with after-the-fact notification). The complication is layered building regulations and lease terms, not the connection itself.

Do I need MCS certification?

For SEG export payments — yes, in practice (most suppliers require it). For the kit to be safe and legal — no. You can install and run a G98-compliant balcony kit without MCS; you just can't register for export income.

Can I claim 0% VAT?

Only if an MCS-certified electrician fits the kit and bills you for both the hardware and the install on a single invoice. A DIY-purchased kit attracts standard 20% VAT.

I live in a flat. Can I install?

Below 18 m / 7 storeys, generally yes with landlord consent and a non-invasive mount. Above 18 m, expect significant pushback under post-Grenfell fire-safety rules; some freeholders ban balcony PV outright on tall blocks regardless of the kit's actual fire rating.

Will my exports earn anything?

Almost certainly no. SEG requires MCS certification of the install, which a plug-in balcony kit can't obtain. Even if you got around it, the export from a 900 Wp kit is ~150-300 kWh/year — at 12p/kWh that's £18-36/year, swamped by the cost of MCS certification (£300-500 one-off).

What if I move?

Take it with you. Re-notify the new DNO with a fresh G98 form within 28 days. The old DNO's record stays on file but is automatically inactive once your meter is decommissioned at the old address.

Sources and further reading

• Ofgem — Smart Export Guarantee overview
• Ofgem — current SEG Licensees list
• ENA — find your DNO
• ENA — Engineering Recommendation G98 (current text)
• MCS — Microgeneration Certification Scheme
• VAT (Installation of Energy-Saving Materials) Order 2022
• Building Safety Act 2022
• Octopus Energy Outgoing — current rates

This guide aggregates publicly available regulatory information for residents of, or movers to, the United Kingdom. It is not legal, tax, or financial advice. For binding interpretations contact Ofgem, your DNO, or a qualified solicitor.