--- title: "In-Roof Solar Panels — Integrated Solar PV Systems UK" description: "In-roof solar panels integrate flush with your roof tiles for a sleek, weatherproof finish. Cost, performance, planning rules, and who they suit explained." lang: en-GB json-ld: | [ { "@context": "https://schema.org", "@type": "LocalBusiness", "name": "Greentech Renewables", "image": "https://www.greentechrenewables.co.uk/logo.png", "description": "MCS Certified Solar Panel and Battery Storage Installers in Greater Manchester. Trusted by 2000+ UK homeowners for renewable energy solutions.", "address": { "@type": "PostalAddress", "addressLocality": "Greater Manchester", "addressCountry": "GB" }, "telephone": "0333 577 7010", "email": "admin@greentechrenewables.co.uk", "url": "https://www.greentechrenewables.co.uk", "priceRange": "££", "aggregateRating": { "@type": "AggregateRating", "ratingValue": "4.9", "reviewCount": "105" }, "sameAs": [ "https://www.facebook.com/greentechrenewables", "https://www.instagram.com/greentechrenewables" ], "hasOfferCatalog": { "@type": "OfferCatalog", "name": "Renewable Energy Services", "itemListElement": [ { "@type": "Offer", "itemOffered": { "@type": "Service", "name": "Solar Panel Installation" } }, { "@type": "Offer", "itemOffered": { "@type": "Service", "name": "Battery Storage Systems" } }, { "@type": "Offer", "itemOffered": { "@type": "Service", "name": "Air Source Heat Pumps" } } ] } }, { "@context": "https://schema.org", "@graph": [ { "@type": "Article", "headline": "In-Roof Solar Panels — Integrated Solar PV Systems: Cost, Performance & Planning", "datePublished": "2026-06-06", "dateModified": "2026-06-06", "author": { "@type": "Organization", "name": "Greentech Renewables", "url": "https://www.greentechrenewables.co.uk/about-us" }, "publisher": { "@type": "Organization", "name": "Greentech Renewables" }, "mainEntityOfPage": "https://www.greentechrenewables.co.uk/in-roof-solar-panels" }, { "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is the difference between in-roof and on-roof solar panels?", "acceptedAnswer": { "@type": "Answer", "text": "On-roof (overlay) solar panels are mounted on rails above existing roof tiles, sitting proud of the roof surface by 5–15cm. In-roof (integrated) panels replace the roof tiles entirely in the solar array zone and sit flush with the remaining roof, creating a seamless appearance. In-roof systems cost roughly the same as on-roof when installed during a roof replacement, but more if the roof needs to be stripped first." } }, { "@type": "Question", "name": "Are in-roof solar panels less efficient than on-roof?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, by approximately 3%. In-roof panels lack the air gap underneath that on-roof panels benefit from. Solar panels lose efficiency as they heat up — approximately 0.4% per degree above 25°C. The reduced airflow in an in-roof installation means panels run hotter in summer, slightly reducing peak output. However, the difference is small and rarely affects the financial case for choosing in-roof." } }, { "@type": "Question", "name": "Do in-roof solar panels cost more than on-roof panels?", "acceptedAnswer": { "@type": "Answer", "text": "When installed during a new build or roof replacement, in-roof solar panels cost a similar amount to on-roof (£5,000–£8,100 for a typical 4kW system). The solar array replaces tiles that would otherwise need to be purchased, offsetting the cost of the integrated mounting system. If the roof is in good condition and does not need replacing, retrofitting in-roof panels requires stripping the existing tiles — this adds cost and in-roof is usually not recommended in this scenario." } }, { "@type": "Question", "name": "Do in-roof solar panels need planning permission?", "acceptedAnswer": { "@type": "Answer", "text": "In most cases, no. Integrated (in-roof) solar panels on residential properties are permitted development in England and do not require planning permission, provided they do not protrude more than 200mm from the roof plane and are not on a listed building. Since in-roof panels sit flush with the roof, they generally satisfy the 200mm condition automatically. Properties in conservation areas or listed buildings require full planning permission." } }, { "@type": "Question", "name": "Are in-roof solar panels suitable for all roof types?", "acceptedAnswer": { "@type": "Answer", "text": "In-roof solar panels are best suited to concrete or clay tile roofs being replaced. They are ideal for new builds, self-builds, and roofs that need replacing anyway. They are not recommended for slate roofs (where on-roof slimline systems preserve the slate), flat roofs (where specialist flat-roof systems apply), or roofs with a pitch under 15 degrees. Greentech Renewables carries out a full roof survey to determine suitability." } }, { "@type": "Question", "name": "What is the best in-roof solar panel system available in the UK?", "acceptedAnswer": { "@type": "Answer", "text": "Popular in-roof solar systems used by MCS-certified UK installers include the Viridian Clearline Fusion, the IKO Solar range, and the SolarSlates system. All use standard solar cells and frameless or near-frameless mounting to achieve the low-profile appearance. Greentech Renewables recommends systems based on your roof specification and budget." } }, { "@type": "Question", "name": "Do in-roof solar panels qualify for the Smart Export Guarantee?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Integrated in-roof solar panels generate electricity in the same way as on-roof panels and qualify for the Smart Export Guarantee (SEG) provided they are installed by an MCS-certified installer. SEG pays you for every unit of surplus electricity exported to the grid — currently 15–24p/kWh from major energy suppliers." } }, { "@type": "Question", "name": "Can I add battery storage to an in-roof solar system?", "acceptedAnswer": { "@type": "Answer", "text": "Yes — battery storage is fully compatible with in-roof solar systems. A GivEnergy 9.5kWh battery stores surplus daytime generation for use in the evening and at night, increasing self-consumption from around 40% to 70–80% and further shortening the system payback period." } } ] } ] } ] --- [0333 577 7010 ](tel:03335777010)[admin@greentechrenewables.co.uk ](mailto:admin@greentechrenewables.co.uk) ★ 4.9 on Trustpilot [![Greentech Renewables - MCS Certified Solar Installers](/assets/greentech-logo-DICMm454.jpg)](/) [Home](/) Our Services Solar Energy [ Residential Solar Home solar panel systems ](/solar-panels)[ Commercial Solar Business & industrial solutions ](/commercial-solar)[ Price Estimator Get an instant quote ](/solar-estimator) Energy Storage [ Battery Storage Store excess solar energy ](/battery-storage) Heat Pumps [ Air Source Heat Pumps Efficient home heating ](/heat-pumps)[ Octopus Cosy Installer Accredited Cosy fitting in Manchester ](/octopus-cosy-heat-pump-installer-manchester)[ Boiler Upgrade Scheme £7,500–£9,000 government grant ](/boiler-upgrade-scheme-bus) EV Charging [ Home EV Chargers Charge at home ](/ev-charging)[ Commercial Charging Workplace solutions ](/ev-charging#commercial) Ready to switch to renewable energy? 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You may get free panels [Check Eligibility](/grants/warm-homes-plan-eligibility) [Case Studies](/case-studies) [0% Finance](/finance)[Quick Solar Price](/solar-estimator) # In-Roof Solar Panels — Integrated Solar PV Systems GR **Greentech Renewables — MCS Certified Solar Installers, Greater Manchester** Last updated: June 2026  ·  Specialists in integrated solar systems In-roof solar panels replace your roof tiles and sit flush with the roof surface — producing clean energy and acting as your weatherproofing layer simultaneously. They cost similar to traditional on-roof panels when installed during a roof replacement or new build, produce about 3% less energy due to reduced airflow, and are the best-looking solar option available for UK homes. ### Key Takeaways - In-roof (integrated) solar panels **replace roof tiles** and sit flush with the roof surface — no raised rails or visible mounting hardware. - Cost: **£5,000–£8,100** for a 4kW system when combined with a roof replacement or new build — similar to on-roof panels because the tiles they replace offset the integrated mounting cost. - Output is approximately **3% lower** than equivalent on-roof panels due to reduced airflow and higher panel operating temperature. - Best suited to **new builds, self-builds, and roof replacements**. Not recommended as a retrofit on a sound roof (stripping adds cost without benefit). - Planning permission is rarely required — integrated panels sit flush so they automatically satisfy the 200mm permitted development rule. Exception: listed buildings and conservation areas. - All in-roof systems qualify for the [Smart Export Guarantee](/grants/smart-export-guarantee) when installed by an [MCS-certified installer](https://mcscertified.com/). - [Battery storage](/battery-storage) is fully compatible — pairing with a 9.5kWh GivEnergy battery raises self-consumption from ~40% to 70–80%. ## What Is the Difference Between In-Roof and On-Roof Solar Panels? Standard solar panels in the UK are installed as **on-roof (overlay) systems**: aluminium rails are anchored to the rafters, and panels are clipped to the rails, sitting 5–15cm above the existing roof tiles. This creates a natural air gap that keeps panels cool and maximises output. **In-roof (integrated) systems** work differently: the tiles are stripped in the solar array zone and replaced by a waterproof tray system. The solar panels clip into this tray and sit flush with the remaining roof surface — no raised edges, no visible mounting hardware, no gap between panel and roof. The result looks like the panels grew from the roof. For aesthetics-conscious homeowners, architect-designed self-builds, and conservation-adjacent properties (where a lower-profile system is preferred), in-roof solar is the industry's cleanest solution. ### ✓ Advantages of In-Roof Solar - Flush, seamless aesthetic — no visible rails - Dual function: energy generation + weatherproofing - Better suited where planning requires low-profile - No gaps under panels — reduced wind lift risk - Cost-neutral when fitted during roof replacement ### ✗ Disadvantages of In-Roof Solar - ~3% lower energy output than on-roof - Panels run hotter — faster degradation long-term - Requires tile strip if retrofitting — added cost - Fewer panel brand choices within integrated systems - More complex to service or replace individual panels ## How Much Do In-Roof Solar Panels Cost in the UK? The cost of in-roof solar panels has converged significantly with on-roof over the past three years. When installed during a new build or roof replacement, the integrated mounting system replaces tiles that would otherwise need to be purchased — keeping overall costs competitive. System Size Panels In-Roof Cost On-Roof Cost Annual Output 3 kW 7–8 £4,500–£6,000 £4,500–£5,500 2,500–2,900 kWh 4 kW 10–11 £5,500–£7,500 £5,000–£7,000 3,300–3,880 kWh 6 kW 14–16 £7,500–£10,000 £7,000–£9,500 5,000–5,800 kWh Retrofit strip cost — \+ £500–£1,500 Not required — All prices above include 0% VAT (standard for solar panels in England). [Solar panel cost guidance](/solar-energy/solar-panel-cost-uk) across all system types is available on our full cost guide. ~3% less output vs on-roof Due to heat retention £5,000+ typical 4kW cost (0% VAT) Greentech 2026 pricing 7–9 yrs typical payback period Greater Manchester 25+ yrs panel performance warranty MCS certified ## When Should You Choose In-Roof Instead of On-Roof Solar? In-roof solar panels make the most sense in four situations: **New builds and self-builds:** Integrating solar at build stage avoids scaffolding costs, eliminates a second contractor visit, and lets you plan cable routes from the start. [Standard solar panel installation](/solar-panels) is almost always the right choice for completed properties — but for new builds, in-roof is the premium option worth considering. **Roof replacement:** If your roof needs new tiles anyway, the marginal cost of in-roof solar versus on-roof is small — and you get a much cleaner finish. Greentech Renewables can coordinate with your roofing contractor or handle the full project. **Conservation-adjacent properties:** Where full planning permission is required (e.g., listed buildings or conservation areas), a flush in-roof installation can sometimes achieve planning approval where raised on-roof panels cannot, because the visual impact is lower. **Premium aesthetics:** Some homeowners simply want the cleanest possible finish. If that is your priority and the additional cost or marginal output reduction is acceptable, in-roof delivers the best-looking solar installation available. ## Do In-Roof Solar Panels Require Planning Permission? Under the [Town and Country Planning (General Permitted Development) Order 2015](https://www.legislation.gov.uk/uksi/2015/596/contents), solar panels on residential rooftops are permitted development — no planning application required — provided they do not protrude more than 200mm from the roof surface. In-roof integrated panels sit flush with the roof and automatically satisfy this condition. Exceptions where planning permission is always required: listed buildings and properties within designated conservation areas. Greentech Renewables carries out a planning check as part of the free site survey for any Greater Manchester property. ### Get a Free In-Roof Solar Panel Quote We design bespoke in-roof solar systems for new builds, self-builds, and roof replacements across Greater Manchester. Fixed price, 0% VAT, MCS certified. [Book Free Survey](/free-quote) [Instant Estimate](/solar-estimator) ## Frequently Asked Questions — In-Roof Solar Panels What is the difference between in-roof and on-roof solar panels? On-roof panels are mounted on rails above your existing tiles, raised 5–15cm. In-roof panels replace the tiles in the solar zone and sit flush with the remaining roof — no raised profile, cleaner appearance. On-roof is the better choice for retrofit; in-roof is best for new builds and roof replacements. Are in-roof solar panels less efficient than on-roof? Yes, by approximately 3%. Without the air gap that cools on-roof panels, in-roof panels run at higher temperatures in summer, which reduces peak output. Annual energy yield from an in-roof 4kW system is approximately 3,300–3,800 kWh versus 3,400–4,000 kWh for an equivalent on-roof system in Greater Manchester. Do in-roof solar panels cost more than on-roof panels? When fitted during a roof replacement or new build, the cost is similar — £5,000–£8,100 for a 4kW system — because tile costs are offset by the integrated mounting system. Retrofitting in-roof on a sound roof adds £500–£1,500 for stripping and is generally not recommended. Do in-roof solar panels need planning permission? No, in most cases. Flush in-roof panels satisfy permitted development rules (no protrusion over 200mm). Exception: listed buildings and conservation areas, where full planning permission is required. We check planning status as part of every free survey. Are in-roof solar panels suitable for all roof types? Best suited to concrete or clay tile roofs being replaced. Not recommended for slate roofs (on-roof slimline systems are better), flat roofs (specialist flat-roof systems apply), or roofs with pitch under 15°. We carry out a full roof survey to determine suitability. What are the best in-roof solar panel systems in the UK? UK-popular integrated systems include Viridian Clearline Fusion, IKO Solar, and SolarSlates. All use standard high-efficiency solar cells with frameless or near-frameless mounting. We specify the most appropriate system for your roof and budget. Do in-roof solar panels qualify for the Smart Export Guarantee? Yes — integrated panels qualify for the [Smart Export Guarantee](/grants/smart-export-guarantee) when installed by an MCS-certified installer. Current best SEG rates: 15–24p/kWh. We register your system as part of the installation. Can I add battery storage to an in-roof solar system? Yes — battery storage is fully compatible. A [GivEnergy 9.5kWh battery](/battery-storage/givenergy-review) raises self-consumption from ~40% to 70–80%, substantially improving the financial return of any in-roof installation. **Methodology note:** Output comparison (in-roof vs on-roof) based on [Viridian Solar field research 2024](https://www.viridian-solar.co.uk/research) and MCS yield calculations for Greater Manchester (1,340 sunshine hours/year). Cost ranges sourced from Greentech Renewables installation data 2025–2026 and [The Eco Experts UK solar cost tracker](https://www.theecoexperts.co.uk/solar-panels/in-roof). Planning rules from [TCPA (General Permitted Development) Order 2015](https://www.legislation.gov.uk/uksi/2015/596/contents). GR Greentech Renewables MCS-certified solar panel installers specialising in both on-roof and [in-roof integrated systems](/in-roof-solar-panels) across Greater Manchester. We serve [Stockport](/solar-panels-in-stockport), [Bolton](/solar-panels-in-bolton), [Rochdale](/solar-panels-in-rochdale), and the wider North West. Rated 4.9★ on Trustpilot. [Read reviews →](/reviews) ## Accreditations ![Our Accreditations: HIES Consumer Code, TSI Approved Code, TrustMark Government Endorsed Quality, Green Deal Approved, MCS Certified, NAPIT](/assets/solar-accreditations-CbjEg9cO.png) Public Liability Insurance – Tradesman Saver £5,000,000 – GREE55TR01 Employers Liability Insurance – Tradesman Saver £10,000,000 – GREE55TR01 Professional Indemnity – Tradesman Saver £250,000 – GREE55TR01 [![Greentech Renewables - MCS Certified Solar Installers](/assets/greentech-logo-DICMm454.jpg)](/) MCS Certified solar panel and battery storage installers serving Greater Manchester and the UK. 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