Balcony Solar Rules UK: Complete Guide

Plug-In Solar Is Now Legal in the UK

The regulations were made on 16 July 2026 and came into force on 27 August 2026. Here is what they mean in practice:

• 800W AC output limit — the cap is on the microinverter's AC output, not the panel wattage. You can oversize panels (e.g. 2×440W) as long as the inverter limits output to 800W.
• PV-only kits — the plug-in route covers panels and a microinverter only. Kits with battery storage are outside the plug-in definition and require a hardwired connection by a Part P electrician.
• No electrician required — self-install is explicitly permitted for PV-only plug-in kits under SI 2026/848.
• No MCS certification required — plug-in kits are exempt from MCS. MCS is only needed if you want Smart Export Guarantee payments (a simplified pathway is expected around April 2027).
• One device per household — current G98 rules limit you to one plug-in device per property (this may be relaxed to one per circuit when G98 is updated).
• G98 DNO notification — you must notify your Distribution Network Operator within 28 days. This is a free notification, not an application — the DNO cannot refuse a compliant installation.
• Applies to England, Wales, and Scotland — not Northern Ireland.

The key legislation is SI 2026/848, which amends the Plugs and Sockets (Safety) Regulations 1994 and the Electricity Safety, Quality and Continuity Regulations 2002. The technical requirements are set out in the Plug-in Solar Device Interim Product Specification (v2, published 16 July 2026).

Current UK Guidance

Understanding the rules around balcony solar in the UK involves several different areas:

• Planning permission - Usually not required
• Building regulations - Generally not applicable
• Electrical safety - Important requirements
• Connection rules - DNO notification
• Tenancy issues - Landlord permission

Planning Permission

In most cases, balcony solar falls under "permitted development," meaning you don't need planning permission:

• Systems are typically considered "minor building operations"
• No significant structural changes
• Panels can be removed without lasting impact

Exceptions where you MAY need planning permission:

• Listed buildings
• Conservation areas
• National parks (some areas)
• Flats with shared balconies

Always check with your local planning authority if you're unsure.

Electrical Safety Requirements

Electrical safety is the most important consideration:

RCD Protection (Essential)

Your socket must be protected by an RCD (Residual Current Device). This is:

• Standard in most modern UK consumer units
• Required for safety if there's a fault
• Usually installed in the last 20 years

Socket and Circuit Requirements

• Standard UK 3-pin socket
• Dedicated circuit preferred
• 13A rated
• No extension leads if possible

Plug-In (PV-Only) vs Battery Kits

One of the most common points of confusion. The plug-in socket route — self-install, no electrician — covers PV-only kits: solar panels plus a microinverter. SI 2026/848's definition of a "plug-in microgenerator" explicitly excludes devices that import electricity to charge a battery for later use.

That means:

If you see a well-known brand (e.g. EcoFlow STREAM with battery, Anker SOLIX Solarbank) listed as non-compliant, that's usually because the kit includes storage — not because the product failed a safety test. A battery kit is still legal to own and legally worthwhile; it just needs an electrician-installed connection instead of a plug.

Distribution Network Operator (DNO) Rules

Under G98, you must notify your Distribution Network Operator within 28 days of plugging in:

• One device per household — current G98 rules limit you to one plug-in device per property
• 28-day notification — this is your legal responsibility, not the supplier's
• Free online portal — use myplugin.solar (run by the Energy Networks Association) to notify your DNO with your email, postcode, and device model
• Notification, not application — the DNO cannot refuse a compliant installation

Your DNO is the company that manages the grid cables in your area (e.g., UK Power Networks, SSEN, Northern Powergrid, Scotland & Southern Electricity Networks, etc.). It is different from your electricity supplier.

Permission Considerations

If You Own Your Property

Generally straightforward, but consider:

• Check for any property restrictions
• Review buildings insurance requirements
• Consider neighbour relations (for shared walls)

If You Rent

You MUST get written permission from your landlord:

• Ask before buying or installing anything
• Get permission in writing
• Discuss any conditions
• Consider portable systems if permission denied

For Flat Owners

Additional considerations:

• Check leasehold agreement
• Get permission from building management
• Consider shared balcony rules
• Check structural load limits

How to Check If a Kit Is Compliant

The ENA Type Test Register is the definitive public database of compliant plug-in solar devices. Before buying any kit, check it there:

1. Go to the ENA Connect Direct register
2. Filter by Category: Inverter, Type: Plug-in Solar
3. Search for the manufacturer and model
4. Check that the status shows "Compliant"

A compliant kit must also be supplied with a plug approved by a notified body for use with a generating device (a standard 13A plug on its own does not qualify). Other things to look for:

• CE or UKCA marking on the product
• Anti-islanding protection (EN 50549) — the inverter must disconnect within 20ms if grid power fails
• IP55+ rating for outdoor components
• Maximum AC output of 800W / 3.5A

MCS certification is not required for self-installed plug-in kits. MCS only matters if you want Smart Export Guarantee payments, and a simplified SEG pathway for plug-in solar is expected around April 2027.

Safety Expectations

A properly installed and compliant system should:

• Have all components with CE marking
• Be connected to an RCD-protected socket
• Have secure mounting
• Have proper cable management
• Be positioned safely
• Not overload any circuits

Regular visual checks are recommended to ensure everything remains safe.

Calculate Your Savings

Now you understand the rules, find out how much you could save.

Frequently Asked Questions

Summary

• Plug-in solar is legal since 27 August 2026 (up to 800W AC)
• Check the ENA Type Test Register for a "Compliant" status before buying
• No electrician or MCS required for PV-only plug-in kits
• Battery kits need a hardwired connection by a Part P electrician
• G98 DNO notification within 28 days is your responsibility
• RCD protection is essential
• Landlord permission needed if renting
• Check for restrictions in flats
• Use calculator to estimate your savings

Get your personalized estimate based on your location.

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