Solar Panels for Restaurants UK

UK restaurants have one of the most favourable demand profiles for commercial solar PV in 2026 — strong daytime preparation activity, lunch service that aligns with peak generation, refrigeration baseload running 24/7, and rising electricity costs that erode margins faster than almost any other hospitality sub-vertical. The economics typically deliver 5.5–7 year payback on capex of £25,000–£95,000 for systems between 25 kW and 100 kW. This page covers restaurant-specific design, common installation challenges (heritage frontages, kitchen extraction routing, three-phase upgrades), worked examples and the canonical sub-vertical sizing guide. For our full restaurant sector page, see restaurants sector page.

Why solar works exceptionally well for restaurants

Three structural features of restaurant operations make solar PV economics consistently strong. First, refrigeration baseload. A typical restaurant runs 4–8 commercial fridges, 1–2 freezers, walk-in cold rooms and ice machines continuously, drawing 8–15 kW continuously through 24 hours. This baseload absorbs solar generation through the entire daylight period, lifting self-consumption ratios into the 80–90% range that drives strong economics. Second, lunch service alignment. Lunch service from 12–2pm coincides exactly with peak solar generation (11am–3pm in summer), and the kitchen prep window from 9am–12pm uses substantial cooking, prep and ventilation power. Third, kitchen extraction. Modern commercial kitchens run extraction systems continuously through service, drawing 3–8 kW depending on canopy size and trim — another sustained daytime load. Restaurants that close mid-afternoon between lunch and dinner still have refrigeration absorbing generation. The combination consistently delivers self-consumption ratios above 80% — materially better than offices (60–70%) or retail (65–75%).

Typical restaurant system sizing in 2026

Restaurant sizing is driven by available roof area, annual electricity demand and self-consumption ratio. Useful 2026 ranges:

• 25–50 kW for small independent restaurants (40–80 covers, 100–150 sqm kitchen, annual demand 50,000–90,000 kWh). Capex £25,000–£60,000. Typical: a single-unit restaurant in a high street location.
• 50–100 kW for mid-size restaurants and gastropubs (80–150 covers, 150–250 sqm kitchen, annual demand 90,000–180,000 kWh). Capex £45,000–£95,000. Typical: a successful gastropub with kitchen, dining room, function space.
• 100–250 kW for restaurant chains, large hospitality venues, and 24-hour operations (150+ covers, multiple kitchens, hotel restaurants). Capex £85,000–£225,000. Typical: a small chain location, hotel restaurant, or 24-hour operation.

A useful rule of thumb: 1 kW of solar PV per 2,000 kWh of annual demand, capped by roof area at roughly 1 kW per 6 sqm of unshaded south-facing roof. A 1,000 sqm roof footprint supports up to 165 kW of PV. Most independent restaurants are roof-area-constrained rather than demand-constrained — we typically size to maximum available roof rather than maximum demand.

Worked example: 50 kW install on a 90-cover restaurant in Manchester

Real-shape project: an 90-cover gastropub-style restaurant in suburban Manchester, 200 sqm kitchen with 4 fridges, 2 freezers, walk-in cold room, large extraction canopy. Three-phase 100A supply. Annual demand 110,000 kWh. Current import tariff 26p/kWh. Trading hours: 11am–3pm lunch, 5.30pm–10pm dinner, 7 days a week. Roof: 320 sqm of south-east facing pitched tiled roof, no overshadowing, structurally sound. We specify a 50 kW PV array on the available roof.

• Capex: £52,500 turnkey (£1,050/kW)
• Annual generation: 46,000 kWh (P50 estimate, southern UK)
• Self-consumption: 84% (38,640 kWh self-consumed, 7,360 kWh exported)
• Year-one savings: £10,046 avoided import (38,640 × 26p) + £441 SEG export (7,360 × 6p) = £10,487
• AIA relief: £52,500 × 25% = £13,125 year-one corporation tax saving
• Net effective capex: £39,375
• Simple payback: 5.0 years gross, 3.75 years net
• 25-year DCF NPV at 7%: £185,000
• IRR: 17.2%

Install timeline: 11 weeks contract to commissioning. Physical work on the roof: 5 working days, all done outside lunch service hours by arrangement. Internal electrical connection at main distribution board: 3-hour planned outage scheduled for a Monday morning (closed day for this venue).

Restaurant-specific design considerations

Five design factors come up consistently on restaurant installs that don't apply to other sub-verticals. Kitchen extraction routing: commercial kitchens require extract canopies vented to a roof termination, typically a vertical riser with a top cowl. Solar arrays must clear the extraction cowl with adequate setback to prevent grease deposition on panels (typical setback 3–5 metres). On smaller restaurants this can constrain panel layout — we always model extraction position before finalising the array layout. Plant room access: inverters need to be located in a ventilated plant room or back-of-house area with adequate clearance for service access. Most restaurants have a small plant or boiler room that suits — but we check during site survey. Three-phase upgrades: single-phase restaurants on 60A or 100A supply usually need a three-phase upgrade for systems above 17 kW per phase — typically £4,000–£12,000 separate from the PV cost. We flag this during initial scoping. Roof age and condition: many restaurants are in older buildings (pre-1990) with original roof coverings. We always inspect roof condition before quoting — any remediation needed is itemised separately. Listed buildings and conservation areas: covered in the next section.

Heritage and listed buildings: solar on historic restaurants

A material proportion of UK restaurants occupy listed buildings or sit within conservation areas — heritage premises are a defining feature of the UK hospitality sector. Solar PV on listed buildings requires Listed Building Consent (LBC) from the local planning authority in addition to standard installation requirements. Outcomes vary substantially by building grade, location and roof orientation:

• Grade I and II* listed buildings: standard solar PV typically refused on principal elevations or visible roofscapes. Approval more likely on rear-facing roofs, courtyard roofs, or ancillary buildings invisible from public viewpoints.
• Grade II listed buildings: mixed outcomes. Consent approval rates around 50% for visible roofs, 80%+ for hidden roofs. Heritage-friendly product specification (solar slate, dark frames, integrated mounts) significantly improves approval rates.
• Conservation areas without listing: standard planning permission usually required (Article 4 directions in many areas). Approval rates 70–90% on most domestic-scale visible roofs.

Solar slate and BIPV options: for heritage-sensitive projects we specify solar slate or building-integrated PV (BIPV) products that match traditional roofing aesthetics. Cost runs £4–£6 per watt versus £1 per watt for standard framed panels — the economics are weaker but planning success and aesthetic outcomes are dramatically better. Major UK heritage solar specifications include GB-Sol Plug-in Solar tiles, Solecco solar slate, and various Tesla Solar Roof equivalents. We include heritage product comparison on every Listed Building project quote.

Battery storage for restaurants with strong evening trade

Restaurants with primarily evening-only trade (no lunch service, dinner-only operation 5pm–11pm) leave most solar generation unused on site without battery storage — the array generates through the day when only refrigeration baseload absorbs output. Adding 50–100 kWh of battery storage to a 50 kW PV system shifts midday surplus into evening peak demand, lifting effective self-consumption from 60–70% to 85–95%. Battery economics on a typical restaurant: capex £30,000–£60,000 for 50–100 kWh of LFP storage installed alongside PV, AIA-eligible at 100%, additional year-one savings £3,000–£6,000 from converted-to-self-consumption export. Combined PV-plus-battery payback for evening-trade restaurants: 6.5–8.5 years gross, 5–6.5 years net of AIA. See battery storage for full sizing and brand specification. For the hospitality sub-vertical specifically, battery economics are usually strongest on hotels (covered separately) and weakest on lunch-only or daytime cafes.

Three-phase upgrades and electrical infrastructure

Many independent UK restaurants operate on a 60A or 100A single-phase electrical supply that limits commercial PV to roughly 17 kW maximum (16A inverter limit per phase). Adding a three-phase upgrade is mandatory for any system above this threshold. Typical costs: three-phase fuse cabinet upgrade at the meter position £1,500–£3,500; service cable upgrade from the DNO substation to the building £1,500–£8,000 (depends on cable run distance and excavation requirements); main distribution board upgrade internally £2,000–£5,000; switchgear, protection and metering £1,500–£3,000. Total typical three-phase upgrade for a UK restaurant: £6,500–£20,000. We always confirm three-phase availability during the site survey and price the upgrade as a separate itemised line on the quote. Many restaurants find that combining a three-phase upgrade with a solar install delivers material additional benefits — capacity for EV charging, future kitchen expansion, or commercial heat pump deployment.

Financing options for restaurant solar

Four main routes work for restaurant solar in 2026, each with different fit. Cash purchase plus AIA delivers the strongest IRR (16–18%) but requires capex headroom — feasible for established restaurant groups with strong retained profits, less feasible for single-unit independents. Asset finance over 5–7 years is the most popular SME route — zero capex outlay, monthly finance payment typically £900–£1,250 on £50,000 capex, monthly bill saving usually exceeds finance payment from year one so cash-flow positive immediately. Operating lease off-balance-sheet treatment helpful for restaurant groups with covenanted finance facilities. PPA rare at sub-100 kW restaurant scale because PPA providers typically want 100 kW+ for unit economics — but some specialists offer multi-site PPA arrangements for restaurant groups across multiple venues. See finance options and commercial solar finance for full route comparison.

Grants and tax relief for restaurants

Restaurants benefit from several specific schemes alongside universal AIA. The Mayoral Combined Authority schemes (GMCA, WMCA, WYCA, LCRCA) explicitly include hospitality SMEs as eligible — typical grant award £15,000–£75,000 on capex £30,000–£150,000. Welsh restaurants access Business Wales energy efficiency grants. Scottish restaurants access Local Energy Scotland support. The British Business Bank Recovery Loan Scheme provides government-backed lending for restaurants needing finance support. Smart Export Guarantee runs alongside any capex relief — typical SEG income on a 50 kW restaurant install £400–£1,200 per year. The grant landscape favours independent SME restaurants over chain-owned locations (chains are typically too large for SME grant eligibility but may access IETF if classified as food and drink processing). See our commercial solar grants guide and the canonical grants and funding page.

Insurance, warranties and operational considerations

Restaurant solar installations need three insurance considerations clarified before contract. Existing buildings insurance typically requires notification of any major roof installation — we provide an MCS certificate, structural sign-off, electrical certificate (NICEIC, NAPIT or Stroma) and DNO connection acceptance, which insurers normally accept without premium adjustment. Solar-specific insurance typically bundled into your existing buildings cover at no additional cost from major insurers (Aviva, Allianz, AXA), though some niche restaurant insurers may require a small premium adjustment. Performance and yield warranties on solar PV: 25-year linear performance warranty (panels guaranteed at 85% of nameplate at year 25) from tier-1 manufacturers; 10–25 year hardware warranty on inverters; insurance-backed installer warranty on workmanship typically 2–10 years. Operational maintenance: typical contract £8–£15 per kW per year covers quarterly visual inspection, annual electrical compliance test, inverter health check, performance monitoring with alerts. We bundle 24/7 monitoring with quarterly performance reports as standard on all our restaurant installs.