Solar Compliance in Scotland: MCS, G99 & Planning Guide 2026

Scotland’s solar compliance framework shares the same UK-wide grid connection standards (G98/G99) and MCS certification scheme as England and Wales, but diverges in several important areas: planning policy is governed by the Scottish Government’s National Planning Framework 4, building standards fall under the Scottish Building Standards system rather than English Building Regulations, and funding support comes from distinct Scottish Government programmes rather than UK-wide schemes.

For installers working across the border, the differences are significant enough that Scotland should be treated as a separate compliance jurisdiction. This guide covers the full picture.

DNOs Serving Scotland

Scotland is divided between two Distribution Network Operators. Identifying the correct one before any grid connection work is the first step in every project.

The boundary between the two networks runs roughly across central Scotland. Aberdeen falls under SHEPD; Glasgow and Edinburgh fall under SP Distribution. Use the ENA’s postcode lookup at energynetworks.org to confirm the correct DNO.

SP Distribution (SP Energy Networks)

SP Distribution covers Scotland’s most densely populated areas. The grid infrastructure in Glasgow, Edinburgh, and the central belt is generally well-suited to solar export, though urban areas can have constraints at the substation level. SP Distribution operates a G98/G99 portal at spenergynetworks.co.uk, and its notification processing times are broadly in line with the national standard. See the SP Energy Networks DNO guide for detailed submission guidance.

SHEPD / SSEN Distribution

Scottish Hydro Electric Power Distribution — operating under the SSEN brand — covers a large, geographically dispersed area including the Highlands and Islands. This network presents specific challenges for solar installers:

• Long, rural distribution feeders: Single-phase rural lines in the Highlands can have limited export capacity. In some areas, the DNO may require export limitation as a condition of G99 acceptance.
• Remote and island projects: For properties on the Western Isles, Orkney, or Shetland, grid connection may involve a local distribution network with additional technical requirements. Some island networks operate partially islanded from the main GB grid, which affects protection relay settings.
• Flexible connections: SHEPD has been an early adopter of flexible connection agreements for commercial and agricultural solar, where the system accepts occasional curtailment in exchange for faster and cheaper connection approval.

See the SSE Networks DNO guide for full details.

G98 and G99 in Scotland

The ENA Engineering Recommendations G98 and G99 apply uniformly across Great Britain, including Scotland. The same thresholds apply:

• G98: Up to 16A per phase (3.68 kW single-phase, 11 kW three-phase). Prior notification 28 days before energisation.
• G99: Above 16A per phase. Full application. 45 working days for DNO response. Written acceptance required before energisation.

The process in Scotland is the same as in England, but submitted to SP Distribution or SHEPD rather than an English DNO. For a full breakdown of the documentation and process, see the G98 vs G99 guide.

One Scotland-specific consideration: the island and remote networks served by SHEPD can have specific protection relay requirements that differ from mainland schedules. If the inverter is being installed in a remote rural or island location, confirm the required protection settings with SHEPD before specifying the inverter model.

Scottish Planning Policy: National Planning Framework 4

Planning in Scotland is a devolved matter, meaning Scotland has its own planning legislation and national policy framework. The key document is National Planning Framework 4 (NPF4), which was adopted by the Scottish Parliament in February 2023 and replaced the previous Scottish Planning Policy (SPP).

NPF4 and Renewable Energy

NPF4 represents a significant shift in Scottish planning policy for renewables. The key provisions for solar are:

• Policy E2 (Renewable, Low Carbon and Zero Emissions Technology and Heat Networks): Sets a strong presumption in favour of all scales of renewable energy development. Planning authorities must support proposals unless specific identified negative impacts clearly outweigh the benefits.
• Policy E3 (Heat in Buildings): Supports the transition to low-carbon heat sources, which includes solar thermal and solar PV combined with heat pumps.
• National Development 9: Offshore and onshore renewables are designated as a National Development under NPF4, giving them priority in the planning system.

In practice, NPF4 makes it easier to obtain planning permission for solar in Scotland compared to the previous SPP framework. Planning authorities are expected to apply the presumption in favour of renewables as the starting point for any solar application.

Permitted Development in Scotland

Scotland has its own Permitted Development Order: the Town and Country Planning (General Permitted Development) (Scotland) Amendment Order 2012, as amended. The permitted development conditions for solar in Scotland are broadly similar to England but with some differences:

• Panels on a dwelling must not protrude more than 200mm from the roof or wall surface
• Panels must not be installed on a wall or roof that fronts a road
• Systems on flat roofs must not exceed 1 metre above the roof level
• PD rights do not apply to Listed Buildings (Category A or B listed in Scotland)
• In Conservation Areas, panels must not be visible from the road

Scotland does not have a separate “Article 4 Direction” mechanism in the same form as England, but local development plans and associated designations can restrict PD rights in specific areas.

Listed Buildings in Scotland

Listed buildings in Scotland are classified as Category A (most significant), Category B (significant), and Category C (local interest). Planning permission and Listed Building Consent are required for solar installations on Category A and B listed buildings. Category C listed buildings may qualify for PD rights depending on the local authority’s interpretation.

Historic Environment Scotland (HES) is the statutory consultee for Category A listed buildings and scheduled monuments. For solar on Category A buildings, early engagement with HES is strongly recommended before submitting an application.

Conservation Areas and National Scenic Areas

Scotland has 635 Conservation Areas designated by local authorities. In these areas, solar installations that would be visible from a road require planning permission rather than relying on PD rights.

Scotland also has National Scenic Areas (NSAs) — equivalent to England’s Areas of Outstanding Natural Beauty — which cover approximately 13% of the Scottish land area. Solar proposals within NSAs are subject to a higher bar of planning assessment, though NPF4’s presumption in favour of renewables still applies.

Scottish Building Standards

Scotland has its own building standards system, administered by the Scottish Government and enforced by local authority building standards verifiers. The relevant section for solar PV is Section 6 (Energy).

Section 6: Energy

Scottish Building Standards Section 6 sets energy performance requirements for buildings. For solar PV, the key requirements are:

• New dwellings: The energy performance calculation under Section 6 uses a methodology similar to SAP (Standard Assessment Procedure) in England. Solar PV generation can be credited against the building’s calculated energy demand. Under the current standards (updated in 2023), new homes must meet a Carbon Dioxide Emissions Rate (CDER) target, and solar PV is one of the pathways to compliance.
• Building conversions and extensions: Significant building work can trigger a Section 6 assessment. Solar PV is not mandated for existing buildings, but may be proposed as part of an energy improvement package.

Scottish Building Standards verifiers (local authority building standards departments) approve building warrant applications. For notifiable electrical work, Scotland requires a Building Warrant for some installation types. Solar PV on dwellings generally requires notification to building standards, and the MCS self-certification route is accepted by Scottish verifiers.

Scottish Government Grants and Incentives

Scotland has distinct funding programmes for domestic solar and low-carbon technology, administered separately from UK-wide schemes.

Home Energy Scotland

The Home Energy Scotland scheme is the Scottish Government’s main residential grant and loan programme for low-carbon energy. Administered by Energy Saving Trust on behalf of the Scottish Government, it offers:

• Grants of up to £7,500 for heat pumps and other qualifying low-carbon measures
• Interest-free loans of up to £7,500 to top up the grant amount for qualifying measures
• Additional funding for rural and island properties in some circumstances

As of early 2026, standalone solar PV is not the primary qualifying measure for the full grant amount under the core Home Energy Scotland programme. However, solar PV installed as part of a package with a heat pump or battery storage can qualify. The programme criteria are updated periodically — check the current scheme terms at homeenergyscotland.org before advising customers.

For households in fuel poverty, additional funding is available through:

• Warmer Homes Scotland: Free energy efficiency improvements for eligible low-income households, delivered by Warmworks Scotland. Solar PV can be included in a Warmer Homes package where technically appropriate.
• Area-Based Schemes (ABS): Local authority-led schemes targeting whole streets or communities with energy efficiency improvements.

No Feed-in Tariff in Scotland

The Feed-in Tariff (FiT) scheme closed to new applicants in 2019 and is not available for new installations in Scotland or elsewhere in the UK. Existing FiT recipients continue to receive payments. New installations must use the Smart Export Guarantee (SEG) for export payments.

MCS Certification in Scotland

MCS certification requirements are identical across the whole of the UK, including Scotland. The MCS installer certificate, product certification, and installation certificate requirements all apply in the same way as in England.

Key practical points for Scottish projects:

• The MCS installer certificate must be current at the time of installation
• Scottish Building Standards verifiers accept MCS self-certification for the electrical installation
• Home Energy Scotland grants require MCS certification as a condition of funding
• The MCS installation certificate is required for SEG registration

There is no separate Scottish equivalent to MCS. All Scottish installers use the same UK-wide MCS scheme.

Smart Export Guarantee in Scotland

The Smart Export Guarantee operates identically in Scotland as in England and Wales. SEG is a UK-wide scheme administered by Ofgem. Scottish solar system owners with MCS-certified installations can register with any SEG-licensed electricity supplier to receive export payments.

Requirements:

• MCS-certified installation
• System capacity 5 MW or less
• Smart meter or half-hourly export meter fitted

Scottish households tend to have lower solar irradiance than English counterparts (particularly in the north and west), but the SEG scheme provides the same financial framework regardless of location. Export rates are set by individual suppliers and vary from approximately 3p/kWh to 15p/kWh as of early 2026.

Community Solar in Scotland

Scotland has a strong community energy sector, partly supported by the Scottish Government’s Community and Renewable Energy Scheme (CARES). Community solar projects — typically rooftop solar on community buildings, schools, or agricultural land shared among a local group — are eligible for development loans and technical support through CARES.

The Community Energy Connect resource provides guidance for Scottish community solar developers navigating the planning and grid connection process.

For community solar installations above G98 thresholds, the G99 application process to SP Distribution or SHEPD is the same as for commercial projects. Larger community solar schemes (above 50 kW) may also require a formal connection agreement rather than just a G99 application, particularly in rural areas with limited network capacity.

Scotland vs England: Key Compliance Differences

Using Solar Design Software for Scottish Projects

The technical design process for Scottish solar projects is the same as for England, but the compliance documentation must reflect the correct DNO (SP Distribution or SHEPD) and the correct planning framework (NPF4). Solar design software that generates DNO-ready documentation and adapts to the local network operator’s requirements reduces the administrative burden significantly.

For projects in remote Scotland — particularly in areas with constrained rural networks — accurate shading and yield modelling is important for demonstrating viability in planning applications and for sizing export limitation equipment correctly. The solar designing feature in SurgePV includes irradiance data and shading analysis for all UK postcodes, including the Highlands and Islands.

Related Resources

• UK Solar Compliance Overview
• G98 vs G99 Guide
• MCS Certification Guide
• Smart Export Guarantee Guide
• SP Energy Networks DNO Guide
• SSE Networks DNO Guide
• Solar Compliance in England
• Solar Compliance in Wales