Restaurant Energy Costs in 2026: Where the Money Goes and What Solar Fixes

Ask a restaurant operator what they pay for electricity and you will get a number. Ask them where it goes and the answer is usually a shrug toward the kitchen. That vagueness is expensive — you cannot fix a cost you have not mapped, and you certainly cannot evaluate a solar quote against it. Here is the map.

The shape of a restaurant’s electricity bill

A typical full-service restaurant’s consumption splits roughly like this: refrigeration takes a quarter to a third (walk-ins, reach-ins, prep fridges, display cabinets, ice machines — running 8,760 hours a year); cooking takes a fifth to a third depending on how electric the line is (induction, combis, fryers); extraction and ventilation take 10–15% (legally required to run whenever cooking happens, in practice 12–16 hours a day); warewashing takes around 10% (heating elements cycling through every service); and HVAC, lighting, and front-of-house absorb the rest, with summer air conditioning an increasingly heavy swing load.

Two structural facts fall out of that map. First, a large share of the load — refrigeration, extraction, prep-hours cooking, daytime HVAC — runs during daylight. Second, the single largest category never switches off at all. Both facts matter enormously for solar.

Why 2026 prices keep the pressure on

Commercial electricity in 2026 trades well above pre-2021 norms even after the crisis peaks unwound, with blended rates for small commercial users commonly sitting in the 25–35p/kWh band once standing charges and non-commodity costs are counted. Hospitality feels this harder than most sectors because its consumption is structural: you cannot turn off the walk-in, extraction runtime is dictated by food safety and Building Regulations rather than thrift, and service hours are set by the market. Efficiency measures — better refrigeration seals, variable-speed extract fans, LED conversion — trim the edges and are worth doing. But the core load remains, which is why operators increasingly look at changing the price of their electricity rather than just the quantity.

What solar actually offsets

A rooftop array changes the price of daytime electricity from your tariff rate to roughly zero marginal cost. Map that against the load profile above and the fit is unusually good: refrigeration’s constant draw absorbs generation every daylight hour including closed days; extraction and prep loads overlap the generation window almost exactly; lunch service lands at solar noon. A correctly sized system — 15–50 kW for most venues — typically covers 30–60% of total annual consumption, with self-consumption rates from 70–90% for daytime-led venues down to 45–65% for dinner-led rooms (where batteries enter the conversation, honestly modelled).

What solar does not do: power you through an outage (grid-tied inverters shut down on mains failure unless paired with islanding-capable storage), run an entire fryer bank at full demand on a December afternoon, or eliminate the bill. Anyone promising bill elimination is selling something other than engineering.

The arithmetic that decides it

Take a venue consuming 60,000 kWh a year at a 30p blended rate — an £18,000 annual electricity cost. A 30 kW array generating 26,000 kWh with 70% self-consumed displaces £5,460 of purchases and earns a few hundred pounds exporting the rest. Installed at around £35,000, that is a six-year simple payback — before the Annual Investment Allowance deducts the full cost from year-one taxable profits, worth £8,750 at the 25% corporation tax rate. After payback, the array keeps generating for the remainder of its 25-year design life at whatever electricity happens to cost in the 2030s and 2040s. That last clause is the quiet heart of the case: solar is less a purchase than a 25-year fixed-price contract for a third of your electricity, signed with your own roof.

For the venue-by-venue version of these numbers — cafés to hotel kitchens — see the costs page, and the kitchen energy guide goes deeper on reading your own half-hourly profile.