Renewable Installations by Local Authority: MCS Data for Your Area

Every certified small-scale renewable installation in the UK is logged on the MCS Installations Database, and total installation volumes and uptake can be found in near-real-time by each home nation and also by each local authority¹. That is the practical answer to the question of how many solar panels, heat pumps or batteries have gone into homes in a given council area: the MCS Data Dashboard, launched in 2022 and free for anyone to view and use, is the tool that carries it².

On the geography, the pattern is consistent across recent reporting. In 2026 the highest numbers of MCS certified renewable installations were registered in Cornwall, Somerset and North Yorkshire, while on installations as a proportion of households the leaders were Neath Port Talbot, Na h-Eileanan Siar and Midlothian³. Those two lists barely overlap, and the reason matters for anyone comparing councils: raw totals favour large, populous, house-dominated authorities, while uptake per household reveals where the technology has actually saturated the local housing stock.

For a household, this data does two things. It shows whether generation, heat and storage equipment is already common enough locally that installers, parts and experience are close at hand, and it shows what the certification trail behind each of those installations means if a system fails. The dependence that remains is real: the dashboard counts only certified work, MCS is one private certification scheme, and a certificate is a record of standards followed at design and handover rather than a guarantee of measured performance.

What the local authority data actually counts

The counts are built from installation certificates raised by MCS certified installers for each specific system they have delivered⁶. That is the unit: one certificate, one installation, attributed to the address where the system was commissioned, which is what allows the data to be aggregated to a council boundary.

The scope is deliberately narrow. MCS certifies, quality assures and provides consumer protection for microgeneration installations and installers, covering small-scale renewable electricity technologies such as solar photovoltaic panels, biomass, wind, heat pumps and heat products. For electricity-generating technologies such as solar PV the scheme's scope runs up to 50 kWe². Anything larger, anything installed by a non-certified contractor, and any DIY work sits outside the figures entirely. A council area with a lot of uncertified or self-installed solar will therefore read low.

What the certificate carries also shapes what can be analysed: the type of system installed, the number of installations delivered under a government scheme, and the cost of the renewable technology⁷. That last field is why the dashboard can report installation cost and, since Phase 3, installed capacity alongside volumes⁵.

Two caveats belong on any local comparison. First, MCS data has been described as holding information on every installation that has received a government grant, which makes it strong on grant-supported work and weaker as a census of all renewable activity⁸. Second, a council-level count says nothing about size: 100 certificates for small solar arrays and 100 for whole-house heat pump retrofits look identical in a volume chart. Filtering by technology type is the only way to avoid that trap. For the wider national series, see the MCS installation statistics page.

What MCS is and why its records function as statistics

MCS is an independent certification scheme for microgeneration installation companies and products, aiming to ensure consistent standards and provide confidence to consumers⁹. Its roles include setting and maintaining technical standards for installations and products, certifying installers and products against those standards, issuing MCS certificates for completed eligible installations, and assisting certification bodies to review and address cases and consumer issues relating to installers or products⁹. It describes itself as a charity-owned company focused solely on improving quality and consumer protection¹⁰, and its product and installation standards are owned by The MCS Foundation and produced by MCS¹¹.

Because certification is a precondition for several public schemes, the database became an administrative record of deployment rather than a survey. Government statistics now draw on it directly: the MCS certified domestic battery installation statistics are sourced from the MCS database and monitor the installation of domestic batteries recorded on the scheme, including capacity and cost¹².

The scheme itself uses the data to track industry growth. Research bodies use it too: one Nesta analysis combined MCS records into a dataset of over 50,000 installations¹⁴.

Where installations are highest: Cornwall, Somerset and North Yorkshire

Cornwall and Somerset trade places depending on the technology and the period. On certified solar, MCS reported Somerset and Cornwall leading with 3,741 and 3,726 certified installations respectively for the year so far as at 13 November 2025¹⁵. On heat pumps, an official ground source heating and cooling market review recorded the highest air-source heat pump installation counts by local authority as Cornwall (5,458), Highland (4,751) and Argyll and Bute (2,764), on data to March 2023¹⁶.

North Yorkshire is the clearest example of depth rather than headline size. MCS reported in June 2024 that the area had surpassed 28,000 certified renewable installations, that 1 in 10 households there had an MCS certified renewable energy installation, and that over 1,300 certified installations had been delivered in the area in 2024 to that point¹⁷.

The common thread is rural, off-gas-grid and detached housing with roof space and land. Cornwall, Highland, Argyll and Bute, Powys and Ceredigion are all sparsely populated authorities where mains gas is least available and where a heat pump replaces oil rather than a condensing gas boiler. That is the mechanism behind the geography, and it is explored further on rural versus urban renewable uptake.

Uptake per household reorders everything. Neath Port Talbot, Na h-Eileanan Siar and Midlothian came out on top in 2026 when installations were measured as a proportion of households³, and none of them appears in the raw-total top three. For a household judging whether local capability exists, the proportional measure is the more informative of the two.

How the nations compare

At regional level, official heat pump deployment statistics for the year ending June 2025 put the largest proportions of government-supported installations in the South West (15%) and South East (15%), followed by Wales (13%)¹⁹. A separate official press release in August 2026 gave the East Midlands 15,981 installations in the year to that point²⁰.

The closed Feed-in Tariff scheme provides the longest-running national split, though it covers Great Britain only. Over the scheme lifetime, installations were 85.87% in England, 7.52% in Scotland and 6.53% in Wales²¹. Scotland's 65,432 accredited installations placed it only eighth regionally in terms of installations accredited under the scheme²². That is a snapshot of the subsidised solar era rather than current activity, and the Feed-in Tariff installation statistics page sets out the scheme's limits.

Current MCS reporting shows Scotland moving faster than those historic shares imply: MCS installers carried out over 20,000 installations in Scotland in 2026, up almost 8% on the same time the previous year³. Wales passed a notable threshold of its own, with MCS reporting more than 100,000 Welsh home and business owners turning to renewable energy¹.

Northern Ireland is the weak point in almost every dataset on this subject. MCS is a UK-wide scheme and its dashboard covers each home nation¹, but the FIT split above is a Great Britain series and many England and Wales analyses, such as the National Energy Efficiency Data-Framework impact tables, are explicitly limited to England and Wales. Separate treatment is on certified renewable installations in Northern Ireland, and the nation-by-nation comparison on which UK nation has the highest renewable uptake.

What the Data Dashboard lets you look up

The dashboard is an interactive online tool providing near-real-time updates on MCS certified installations for small-scale renewables across the UK, drawing data from the MCS Installations Database². MCS describes it as a dynamic view of every certified installation since 2009, and elsewhere as holding the details of every certified installation since 2008²³.

It is divided into two sections, Installation Insights and Scheme Insights, and both can be filtered by month, year, location, technology type and installation type². That filter set is what turns a national series into a local one: selecting a single authority, one technology and one year gives the figure a householder or a councillor is usually after.

Phase 3 went live on Monday 24 August 2026 and added three things⁵:

• a Capacity graph in the Installation Cost section, showing total installed capacity
• total installers by technology in the Technology Type Breakdown graphic
• unique identifiers and timestamps on downloads from the dashboard

The installer-count addition is the one that most changes what a local search can answer. Volume tells a household how many systems exist nearby; installer counts by technology indicate whether the supply chain to service them exists nearby too. A longer walkthrough sits on what the MCS Data Dashboard shows. Where the dashboard cannot answer a question, MCS operates a separate data request route⁶.

Record years: how the numbers have grown

The trajectory behind every local figure is steep. An MCS report noted over 1.2 million installations across 14 years, saving almost 10 million tonnes of carbon dioxide equivalent, and observed that 1.2 million installs over 12 years suggests a rate of 100,000 per annum²⁴. By October 2025 the cumulative figure had passed 2.2 million certified installations, delivered by close to 6,000 certified installers¹⁰; a case study in August 2026 referred to over 2 million certified installations across the UK²⁵.

Annual volumes are what moved. MCS reported that annual certified installations increased by more than 500% under Ian Rippin's leadership as chief executive, and that 2026 was already tracking to be the sixth consecutive record-breaking year for certified installations²⁶. 2025 itself saw record numbers of certified installations, including 100,000 certified installations carried out on new homes in that year²⁷. Battery storage is the fastest-moving category: official statistics record that MCS certified installations of domestic retrofit electric batteries have been increasing¹².

Detail by technology sits on UK solar PV deployment statistics, UK heat pump installation statistics and home battery storage installation statistics.

Technologies covered by the count

MCS product certification is available for solar PV, solar mounting, small wind turbines, heat pumps, biomass, solar heating and micro CHP²⁸. MCS lists battery storage, biomass, micro CHP, solar heating and small wind turbines as additional technologies alongside the core categories⁶. In consumer-facing terms the scheme covers installations of small-scale renewables from solar panels to heat pumps to small wind turbines, in homes and small businesses throughout the UK²⁵.

Air-to-air heat pumps are the notable gap. Warm Homes: Local Grant policy guidance published in July 2026 states that air-to-air heat pumps are not eligible for that grant until they are able to be certified by MCS, expected in 2026²⁹. A household installing an air-to-air system today will not appear in the local authority counts and will not access that grant route.

For battery figures, the cost value associated with each installation on the scheme includes the cost of the battery, the cost of installing and connecting it to the electricity supply, and VAT where applicable¹². That is a fuller cost basis than a hardware price, which matters when comparing local average costs between areas.

What an MCS certificate means for the household

The certificate is a record that the installation was carried out by a certified installer using certified products, and it is required when accessing some grants and incentives³⁰. Certified installers must follow the criteria set out in the MCS Installation Standards³¹, and for ground and water source systems must use MCS certified heat pumps that have been tested for quality, reliability and performance³⁰.

The limits are set out plainly in official work. A report on the heat pump transition records that MCS requires installers to provide a design-stage prediction of system efficiency, not to verify actual performance, and that MCS does not require remediation of systems that are underperforming relative to their design³². The same report notes that weather compensation is not mandatory under current MCS requirements, that third party non-modulating controls are not prohibited, and that MCS specifies handover documentation but not the quality of verbal explanation, household understanding, structured follow-up or ongoing support³².

That is the honest reading of a certificate in the local authority count: it evidences a standards-compliant design and a compliant handover, not a measured outcome in the home. The gap between design and measurement is the subject of measured versus modelled home energy performance.

How certification links to grants

MCS certification is a requirement for accessing many UK government incentives²³. Under the Boiler Upgrade Scheme, installers must be MCS certified and certified to install heat pumps and biomass boilers³³. To access grants such as the Boiler Upgrade Scheme or Home Energy Scotland funding, the installer must be from an MCS-certified business³⁴. Historic schemes worked the same way: installation contractors had to be certified by MCS and install MCS certified products to qualify for the Renewable Heat Incentive or the Green Homes Grant³⁵.

This is the main reason local authority counts track grant activity so closely. Where a scheme is generous and locally promoted, certified volumes rise; where it is not, work either does not happen or happens outside the count. Scheme-level data is on Boiler Upgrade Scheme statistics and Renewable Heat Incentive statistics.

Certified installers must also explain how a grant or incentive the customer qualifies for is applied to the cost of the installation. Post-installation, MCS undertakes its own checks on installations completed by certified installers, separate from Ofgem's audit programme, and may contact the property owner directly or arrange a visit³⁶; property owners are asked to respond within seven days where contacted for such checks.

If something goes wrong: complaints and consumer protection

Using an MCS certified installer gives a household a defined route if something goes wrong³⁷. The installer must be approached first; MCS then acts as the single point of contact for complaints about certified installers or installations³⁸.

MCS defines a complaint as:

Complaints MCS will consider cover system performance and design, quality of work, incomplete installation, delayed installation, commissioning and handover, installer conduct, damage to property, mis-selling, contractual issues, issues with a product, and breaches of the MCS Customer Commitment³⁸. During an investigation, MCS will speak to third parties on the household's behalf, carry out a technical review of the installation if needed, and work with the installer to reach a resolution⁴⁰. It asks for details of what went wrong, photographic evidence, supporting documents, and willingness to engage and allow the installer access to remediate⁴⁰.

Certified installers must acknowledge a complaint within two working days and respond effectively, give clear information on how to contact them with questions, concerns or complaints, and signpost customers to the MCS complaints process if they are unhappy with the outcome³⁹. Details of a complaint are shared with the installer's certification body and, where applicable, its consumer code³⁸.

MCS certified installers must also be registered with a consumer protection scheme such as RECC or HIES⁴², and membership of a CTSI Approved Consumer Code of Practice scheme is a requirement for companies seeking MCS certification in the first instance⁴³. Contact points are the complaints address mcscomplaints@mcscertified.com⁴⁴ and the telephone number 0333 103 8130⁴⁵; a separate line, 0333 103 8198, is used for routine post-installation verification carried out on behalf of Ofgem⁴⁵. Where a complaint reaches an impasse, Ofgem's guidance is that a household can approach the MCS Administrator, who will advise how to make a complaint about the installer⁴¹. Whistleblowing reports, including an installation that does not meet MCS standards, use the same complaints mailbox⁴⁴.

What the local picture means for energy independence

A high certified installation count in an area is a signal of installed generation, heat and storage capacity, and of a local supply chain able to deliver and service it. It is not independence on its own. Almost every counted system remains connected: solar PV exports to the grid and imports at night, heat pumps draw grid electricity, and batteries shift rather than remove supplier dependence.

The certification chain adds its own dependencies. The count exists because a private scheme issues certificates; grant access depends on that scheme's approval; remedy for poor work depends on the installer, its certification body and its consumer code remaining in business within the complaint window. The scheme is changing around households too: the redeveloped MCS installer scheme is being rolled out to thousands of businesses²⁶, with rollout continuing over coming months²⁷, and it introduces a legally binding commitment for installers to adhere to consumer protection law³. Government has also signalled a consumer protection service with powers to enforce better service through contracts holding installers and delivery partners to account, including bans from working on government schemes if they do not meet high standards.

Installer capacity is the constraint the geography exposes most sharply. A parliamentary committee reported around 930 air-source heat pump installation companies accredited by MCS, of which around 600 also install ground-source heat pumps⁴⁶, against nearly 6,000 MCS certified businesses overall²⁶. The same committee record noted a 65 per cent reduction in MCS accredited installers between 2014 and 2017⁴⁶, a reminder that the installer base has contracted before when policy support was withdrawn. In a council area with few certified heat pump companies, a household's practical choice is narrow regardless of how many solar certificates the area has accumulated. Broader context sits on what the data says about household energy independence and who publishes UK home energy data.