Renewable Energy for Cornwall's Hotels, B&Bs and Restaurants

Most generic solar designs assume a fairly flat commercial demand curve. Hospitality is the opposite. A 24-bedroom hotel in Newquay we surveyed in March pulled 38 MWh in July and 9 MWh in February — a 4.2x ratio. The temptation is to size PV to summer peak so you self-consume the lot, but that strands capacity for nine months. The smarter design uses Cornwall's 1,298 kWh/m²/year irradiance figure (19% above the UK mean and the highest in mainland England) to oversize the array slightly, then deploy a battery to time-shift the shoulder months when guests still arrive but the sun does less of the work.

For a typical 20-30 room property we model three concurrent loads: kitchen extract and induction draw (60-90A 3-phase peak), domestic hot water at the 7.30-9am shower spike, and laundry/dishwash at the 10am-2pm changeover. A correctly sized solar PV system of 30-50 kWp paired with a 30-60 kWh battery typically self-consumes 78-86% of generation in season and 55-65% off-season, depending on whether you run an indoor pool or hot tub.

• Falmouth waterfront sites: salt-spec aluminium fixings, marine-grade isolators
• St Ives stepped roofs: micro-inverters or DC optimisers to handle shading from chimney stacks and gable returns
• Newquay flat-roof Edwardian conversions: ballasted east-west arrays with parapet-aware tilt
• Padstow listed-curtilage properties: in-roof integrated PV (Viridian or GSE) for conservation officers

We model every job in PV*SOL or Easy-PV with eight-minute timesteps against your half-hourly HH data — never with annual averages. If your installer hasn't asked for HH data, walk away.

Cornwall is 47% off-gas — far higher than the English average — so a huge proportion of hospitality properties heat with oil, LPG or direct electric. Even those on mains gas face standing charges of £180-£260 a month on a commercial meter regardless of consumption. An air-source heat pump sized for the building's actual heat loss (we do MCS-compliant Heat Loss Calcs to BS EN 12831) lets you walk away from the LPG bowser entirely and run winter heating on roughly a third of the kWh you'd burn with direct electric panel heaters.

For hotels above the BUS-eligible domestic threshold, the Boiler Upgrade Scheme £7,500 grant is unfortunately domestic-only — a frequent disappointment. But commercial hospitality can access the Industrial Energy Transformation Fund (IETF) Phase 3 (extended to 2028) for energy-efficiency capex above £100k, plus 100% Annual Investment Allowance up to £1m on qualifying plant. Cascade systems using two or three smaller monobloc units (Mitsubishi Ecodan QUHZ, Daikin Altherma 3 H HT, or Vaillant aroTHERM plus) give you redundancy — critical when a single failure on Christmas Eve in Padstow could shut the whole kitchen.

Hot water specifically

The 7.30-9am shower spike is the killer. We typically specify a 1,000-2,500L thermal store charged overnight on cheap-rate electricity (Octopus Agile, British Gas Lite Business or Drax flex tariffs) and topped up by PV during the day. This collapses the heat pump's required peak output by 60-70%, which in turn means you can install a 16kW unit instead of a 30kW unit, saving £8-12k on capex and avoiding a DNO G99 application above 17kW per phase.

A commercial kitchen extract canopy in a busy seafood restaurant pushes 4,000-7,000 m³/hr, which means you're heating that volume of replacement air every hour the kitchen is open. Heat recovery on the make-up air unit (typically a plate or rotary HRV at 70-85% efficiency) is one of the highest-IRR retrofits in the sector — 18-month paybacks are common. Pair it with refrigeration heat recovery from your walk-in fridges and you can pre-heat domestic hot water to 35-40°C for free, leaving the heat pump to lift the last 15°C.

On EPC ratings: the commercial Minimum Energy Efficiency Standards (MEES) require all leased non-domestic properties to hit EPC C by 1 April 2027 (with E since 2023 already enforceable, fines up to £150k). Many Victorian B&Bs in Falmouth and St Ives currently sit at D or E. The fastest C-grade route is usually: solar PV (worth 1-2 SBEM points), heat pump replacing direct electric or oil (worth 3-5 points), LED retrofit, and roof-level insulation top-up. We commission a full SBEM-modelled upgrade plan showing the exact EPC score before and after, with capex against grant eligibility.

Three reasons hospitality operators install EV chargepoints in 2026: guest expectation (Booking.com filters now show EV-amenity properties first in Cornwall search), revenue (Zest, GRIDSERVE, MFG and Connected Kerb all offer host arrangements with 8-15% revenue share), and planning (any new build or major refurb over 10 spaces triggers Part S of the Building Regs requiring active provision).

The Workplace Charging Scheme gives £350 per socket up to 40 sockets per applicant for staff/fleet bays. Public-facing guest bays don't qualify but can access OZEV's Local EV Infrastructure (LEVI) fund routed through Cornwall Council, plus the destination charging element of the GRIDSERVE/Zest commercial offer. We design split-load systems where guest 7-22kW chargers share grid capacity intelligently with the heat pump and kitchen, avoiding a £25-90k DNO upgrade. Typical economics for a 12-bay 22kW destination installation in Newquay: £68k capex, £18k LEVI contribution, payback 4.2 years on tariff revenue alone.

• Hotels with 30+ rooms: 6-12 x 7-22kW dual-socket units, ideally split-load managed
• Restaurants with car park: 2-4 bays sized for 90-min dwell time, 22kW preferred
• Holiday lets and self-catering: 1-2 x 7kW per dwelling — see our holiday parks page

The headline grants for hospitality in Cornwall in 2026:

• Industrial Energy Transformation Fund (IETF) Phase 3 — up to 30% of qualifying capex on heat decarbonisation and energy efficiency, projects above £100k
• Workplace Charging Scheme — £350/socket × up to 40 sockets for staff bays
• SWIG Finance (Cornwall-based CDFI) — sub-£100k loans for SME hospitality at competitive rates with grant-blended tranches
• Cornwall Council Rural Communities Energy Fund (where applicable) — feasibility grants for community-linked sites
• Smart Export Guarantee (SEG) — current best commercial export tariffs from Octopus and E.ON sit around 12-15p/kWh for installations under 5MW

For finance, our 0% APR option covers installs up to £50k for qualifying SMEs (subject to status), and we work with three asset finance lenders (Shawbrook, Aldermore, ThinCats) for £50k-£1m heat pump and PV deals. Our typical PV-plus-battery hospitality client sees a 5.8-7.2 year simple payback at current commercial electricity tariffs (April 2026 reference: 28-34p/kWh non-domestic standard rate).

Western Power Distribution (now National Grid Electricity Distribution Cornwall) runs one of the most constrained LV networks in England. Whole substations along the north coast — particularly serving Newquay, Padstow and St Agnes — are at or beyond firm capacity for new generation. A G99 application above 17kW per phase can take 3-9 months and may return a connection offer requiring £30k-£150k in reinforcement. We hold pre-application data on all major Cornish substations and can tell you within 48 hours whether your site has headroom or whether you need to look at a flexible connection (ANM) instead.

Salt corrosion on coastal sites means stainless A4 fixings, marine-spec inverters (SMA Sunny Tripower X with the coastal-environment cabinet, or SolarEdge with marine warranty extension), and IP66 isolators on the south-facing weather elevation. We've replaced too many three-year-old budget arrays in Mousehole and Sennen to recommend anything else.

For project management we run a single point of contact from feasibility through commissioning. Most hospitality installs are scheduled for the September-April shoulder season to avoid disrupting trade. Roof works on a 30-room hotel typically take 8-14 working days; heat pump swap-outs from oil are 4-7 working days with a 24-hour hot water gap managed by a temporary immersion bypass.