Solar Panels for UK Restaurants and Hospitality

Why solar PV makes sense for restaurants

Restaurants run an electricity-intensive operation, and they run it during the hours of strongest solar generation. The lunch service from 12:00 to 14:30 sits squarely inside the highest-yield window of any UK PV system, and the dinner service from 18:00 to 22:00 runs into the early-evening shoulder where solar still produces meaningful kWh in summer months. Add the prep kitchen running from 09:00 onwards, refrigeration cycling continuously, and walk-in coolers and freezers drawing baseload day and night, and you have one of the few hospitality categories where solar self-consumption ratios consistently land above 70%.

The load profile is dominated by three things: refrigeration, cooking, and extraction. Refrigeration — walk-in coolers, freezers, prep-line under-counters, beverage chillers, ice machines — runs 24 hours and accounts for 25-35% of typical annual consumption. The good news for solar economics: refrigeration is daytime-present every single hour. Cooking equipment (electric hobs, ovens, char grills, fryers, salamanders, holding cabinets) is the second-largest load and runs concentrated in service windows. Extraction (kitchen canopy, makeup air, grease interceptor fans) runs whenever the kitchen is on and adds substantial three-phase load. All three are daytime-aligned and all three pair well with rooftop PV.

Beyond load shape, restaurant economics make the case sharper than most sectors. Gross margins on food and beverage are tight, and energy is one of the few cost lines a restaurant operator can structurally reduce without affecting customer experience. A restaurant turning over £900,000 a year on a 12% operating margin runs a typical electricity bill of £22,000-£36,000 — cutting that by 65-70% through solar lifts net profit by close to a full margin point. Compounded over a 25-year asset life that’s a substantial improvement in NPV per restaurant location, and for groups operating 10-30 sites it’s a meaningful boost to the EBITDA used in any future trade sale or refinancing.

The customer-facing angle matters too. Increasingly the casual dining and premium-casual segments are competing on sustainability credentials alongside cuisine and service, and a measurable Scope 2 reduction (verifiable from utility bills, not just claimed) is becoming a real procurement requirement when restaurants tender for corporate catering, private events, or B Corp certification. We’ve seen Scope 2 figures cited in restaurant group annual reports increasingly often, and on-site generation is the cleanest line item to put against that target.

The fifth factor is leasehold versus freehold. Most UK restaurants are leasehold, which historically blocked solar deals. Green-lease addenda from 2023 onward, landlord-led installs with cost recovery via service charge, and PPA structures have made leasehold solar genuinely viable. We design every restaurant quote around the operator’s actual lease structure rather than assuming freehold ownership.

System sizing for restaurants

The standard sizing range for UK restaurants sits between 25 kW and 100 kW, comprising 46-185 panels and occupying 150-600 square metres of usable roof area. A 25 kW system suits a small independent restaurant of around 50-70 covers with annual consumption around 32,000 kWh. A 100 kW system suits a large casual-dining operator with 180+ covers, full bar, and 130,000 kWh annual consumption.

Annual consumption is the sizing starting point. Casual dining restaurants in 2026 typically consume 250-450 kWh per cover per year, depending on cuisine (fully gas-cooked low-end, fully electric or induction high-end), refrigeration intensity, and extraction load. We pull half-hourly meter data over 12 months and run consumption clustering to identify the actual baseload, lunch peak, and dinner peak, then size for 60-75% annual generation against consumption.

Roof area is often the binding constraint, particularly for ground-floor restaurants in mixed-use buildings where there is no dedicated roof. Standalone restaurant buildings (drive-through casual dining, neighbourhood bistros in detached premises) typically have enough roof area for the full sizing range. Restaurants in mid-terrace city-centre buildings often have only a small flat roof above the kitchen extension and may be limited to 15-25 kW even where consumption supports a much larger system.

Roof type drives mounting choice. Most restaurants in mixed-use city-centre buildings have flat membrane roofs above kitchen blocks — these take ballasted east-west systems best. Standalone casual dining buildings constructed since 2010 typically have steel-portal pitched roofs with profiled metal cladding ideal for clip-fix solar.

Self-consumption ratio for restaurants typically sits at 70-80% without batteries — among the highest in the SME sector — driven by the always-on refrigeration baseload. Battery payback is rarely justified at that level of self-consumption.

Cost and payback for restaurants

A 25-100 kW restaurant solar system in 2026 costs between £25,000 and £95,000 installed. Cost per kilowatt sits at £900-£1,200/kW for systems below 100 kW. Restaurants in the 25-50 kW range often run towards the upper end because of the more complex roof access (kitchen extraction grease ducting, condenser units, sprinkler infrastructure) and the listed-frontage planning overhead common in city-centre restaurant locations.

Worked example. A casual dining restaurant in a regional city with 140 covers, full bar, electric induction kitchen, and annual consumption of 78,000 kWh on a 30p/kWh contract spends £23,400 a year on electricity. A 50 kW flat-roof system on the kitchen block, costing £55,000 installed, generates around 46,000 kWh in year one. Self-consumption modelled at 76% (continuous refrigeration plus dinner service shoulder): 35,000 kWh self-consumed at 30p saving £10,500. The 11,000 kWh exported delivers £1,100 of SEG income at 10p/kWh. Total annual benefit: £11,600. Simple payback: 4.7 years before tax relief.

Under 100% AIA, a profitable limited company at 25% corporation tax deducts the £55,000 in year one, generating £13,750 of tax relief. Post-tax effective net cost: £41,250. Post-tax simple payback: 3.6 years. Modelled 25-year IRR rises to around 19%.

Financing route depends on the operator’s capital position and group structure. Cash purchase suits founder-owned independent restaurants with retained earnings. Asset finance over five to seven years suits independent restaurants and small groups that prefer to preserve working capital for kitchen refurbishment, marketing, or new-site investment — finance payments typically run lower than bill savings from month one. PPA suits restaurant groups with multiple sites and a preference for opex over capex — a third party owns the system and sells power back at a fixed unit rate typically 30-50% below grid retail. Several casual-dining groups prefer this structure because it scales across an estate without balance sheet impact. We model all three and present the IRR side by side. Compare the financing options in detail at our cost page and grants and funding page.

Compliance and regulation

Most restaurant solar PV installations fall under Permitted Development rights under Class A Part 14 of the GPDO 2015. Listed buildings and conservation areas are common in city-centre restaurant locations — historic pub-restaurant conversions, boutique hotel restaurants, and Victorian shop-fronts converted to dining rooms — and these need Listed Building Consent or planning permission for any visible roof PV. Rear roofs and kitchen extension flat roofs are usually less constrained and form the basis of most heritage-zone restaurant installs.

Kitchen extraction compliance is the single most underweighted issue in restaurant solar. The DW172 grease duct standards require minimum clearances around extraction ducts, condenser units, and makeup air intakes — and panels installed too close to a grease canopy outlet will be coated with extraction grease within weeks, killing the generation and creating a fire risk. We coordinate the array layout with the kitchen extraction drawings and maintain a 2-metre exclusion zone around all canopy outlets, with cleanable access for the annual extraction inspection.

Gas safety: kitchens running gas hobs, ovens, or salamanders have gas interlock systems that integrate with extraction. Solar inverter installation never affects gas interlocks, but the electrical contractor needs to coordinate any temporary shutdowns with gas safety certification cycles.

DNO connection thresholds matter. Restaurant systems below 100 kW use the G98 connect-and-notify process — turnaround typically 4-8 weeks. Systems above 100 kW are rare in this sector but use G99 (6-18 months).

Insurance and fire alarm integration: restaurant insurers increasingly require fire-alarm-integrated DC isolation and arc-fault detection. We design these as standard and liaise with the insurer before commissioning. Sprinkler systems where present remain unaffected by rooftop PV but the array layout must respect sprinkler service access.

CDM 2015 Construction Design and Management Regulations apply to restaurant installations exceeding 30 person-days — most 50 kW+ jobs fall into this bracket and we appoint a Principal Designer accordingly.

A typical restaurants install scenario

A 140-cover casual dining restaurant occupying a standalone single-storey building constructed in 2014 in a regional retail park. Steel-portal frame, profiled metal pitched roof, gross roof area 720 sq m with 540 sq m usable after excluding extraction zones, condenser footprints, and edge zones for wind uplift. Annual electricity consumption: 82,000 kWh, dominated by induction cooking (32%), refrigeration (28%), extraction and HVAC (18%), lighting and AV (14%), and miscellaneous loads (8%). Current electricity bill: £24,600 a year on a 30p/kWh fixed contract expiring in 9 months.

The system specified: 55 kW PV array using 102 panels installed in a clip-fix configuration on the profiled metal roof, fed by a single 50 kW inverter (modestly oversized DC-to-AC ratio of 1.10 for better summer performance). DC isolation integrated with the building’s fire alarm panel. Array layout maintains a 2.5-metre exclusion zone around the two kitchen canopy outlets and a 1.5-metre service access strip running north-south across the building. Total installed cost: £60,500 including DNO fees and commissioning.

Year one results: actual generation 50,800 kWh (within 2% of model), self-consumption 78% delivering £11,890 of cost avoidance at the contracted retail tariff, plus £1,118 of SEG export income at 10p/kWh on 11,180 kWh exported. Total year one benefit: £13,008. AIA tax relief in year one for the limited company at 25% corporation tax: £15,125. Post-tax effective net cost: £45,375. Post-tax simple payback: 3.5 years. The restaurant references “powered by 55 kW of rooftop solar” on its menu and ESG page and has used the install in winning two local-authority private-events tenders.

Sector-specific FAQs

Will the kitchen extraction grease damage the solar panels? Only if the array is installed too close to canopy outlets. Grease aerosol from extraction can coat surfaces and is a documented fire risk if it accumulates. We design every restaurant array with a minimum 2-metre exclusion zone around all canopy and condenser outlets, oriented to keep panels upwind of the prevailing extraction plume where the building geometry allows it. Annual cleaning of the panels is recommended in any restaurant install regardless of extraction proximity, and we include a first-year clean as part of the commissioning package.

Our restaurant is leasehold on a 10-year lease — can solar still pay back? Yes, but the structure has to fit. The cleanest route for a leasehold restaurant is either a green-lease addendum where the landlord owns the system (with cost recovered via service charge and the tenant benefiting from a lower energy cost) or a PPA where a third party owns the system and sells the generated power at a fixed unit rate below grid retail. The PPA contract typically follows the building, not the tenant, so the system stays put when the lease ends. We’ll advise on which structure fits your lease, and we’ll be honest if the lease term is too short for sensible economics.

How does solar work with our induction kitchen? Better than with gas. An all-electric induction kitchen has a much higher daytime baseload than a gas kitchen — induction hobs draw substantial three-phase load during service, and that load aligns perfectly with solar generation. Restaurants moving from gas to induction (a common upgrade in the casual-dining segment driven by indoor air quality and Net Zero commitments) often size their solar installs 20-30% larger than they would have under a gas configuration. We model both pre and post-induction-conversion scenarios when relevant.

What about our condenser units and rooftop plant? Restaurant rooftops are crowded — condenser units for refrigeration, AC condensers, makeup air units, kitchen extraction, sometimes a small plant deck for fire pumps. The solar array layout has to work around all of it, with cleanable service access around every plant item. We do a full plant inventory during the structural survey and produce a clash-detection drawing before issuing the fixed-price proposal. Honest sizing matters more than chasing kilowatts.

Can we get visibility of generation for our customers and ESG reporting? Yes. Every system we install includes a wired or wireless monitoring system that reports generation, self-consumption, and export at sub-hourly granularity. The monitoring portal integrates with most ESG reporting tools, and we offer a public-facing display option (a small lobby screen showing live generation and avoided CO2) that several of our restaurant clients have used. The data is auditable for B Corp certification and for inclusion in published group sustainability reports. Compare with the hotels sector where the same monitoring approach supports brand ESG reporting.

Next steps

The honest first step is a free desk feasibility study. Send us your last 12 months of half-hourly meter data, the floor plan and roof drawings if you have them, photos of the kitchen extraction layout, and your lease structure if leasehold, and within 7 working days we’ll model an indicative system size, generation forecast, self-consumption ratio, financial DCF, and IRR — using your actual consumption pattern rather than a generic estimate. If the numbers work, we’ll arrange a site survey and issue a fixed-price proposal with full PVSyst modelling. We’re MCS-certified for commercial, NICEIC-registered, RECC and TrustMark licensed, and carry a 10-year IWA insurance-backed workmanship warranty. To get a quote tailored to your restaurant, visit our quote page, review typical costs and payback, or read the FAQs.