Solar vs Grid Electricity for Pubs: How Much to Save

Every pub already buys all of its electricity from the grid. The real question is not whether to leave the grid, no pub does, but how much of that grid bill solar can take off the table, and whether the saving justifies the spend. A pub has an awkward load shape for this: cellar cooling runs around the clock, the kitchen and refrigeration build through the day, but the trade that fills the till lands in the evening and at weekends, after the panels have stopped working. This guide compares a solar-led approach against staying fully grid-supplied, sets a realistic figure on how much of the bill solar can cut, and shows where a battery does and does not earn its place.

The two routes in plain terms

Grid-only. You buy every kilowatt-hour from your supplier at the standing unit rate, exposed to wholesale price swings and to whatever your next contract renewal brings. There is no capital outlay and nothing to maintain, but you carry the full bill and the full risk of it rising. For a pub, where electricity is one of the largest controllable costs after wages and stock, that exposure is the problem.

Solar plus grid. You generate part of your own power on the roof and top up from the grid for everything the panels do not cover. You still need the grid connection, solar does not replace it, but you shrink the metered import and lock in part of your supply at the fixed cost of an asset you own. The trade is the up-front capital (or a finance arrangement) and a modest maintenance commitment, in exchange for a lower and more predictable bill for twenty-plus years.

Side by side

The contrast lines up cleanly across the factors that matter to a licensee:

Factor	Grid-only	Solar plus grid
Bill exposure	Full bill, full price risk	Reduced import, part of supply price-locked
Share of bill offset	None	Roughly 25 to 45 percent typical
Up-front capex	None	£10,000 to £90,000 (10 to 100 kW)
Evening-peak coverage	Grid covers everything	Grid still covers the peak (battery can help)
Resilience to price rises	Low, exposed at every renewal	Higher, owned generation is inflation-proof
Carbon	Full Scope 2 emissions	Roughly 2 to 21 tonnes CO2 saved a year

The headline is straightforward. Staying grid-only costs nothing today but leaves you fully exposed to every price rise. Solar does not free you from the grid, it shaves a meaningful slice off the import and fixes the cost of that slice, while the evening peak, the busiest and most valuable trading hours, stays on the grid unless you add storage.

How much can solar actually cut?

The honest answer is a range, and the range is driven by how well your demand overlaps with daylight. For most pubs, a well-sized rooftop array offsets somewhere between 25 and 45 percent of the annual electricity bill. Where a site lands inside that band comes down to two things: what kind of pub it is, and how it is held.

Food-led versus wet-led. A food-led pub or gastropub runs heavy kitchen extraction, walk-in cold rooms and refrigeration that all build through the daytime and lunch service, exactly when the panels are generating. That daytime overlap is high, so a food-led site sits at the upper end of the offset range. A wet-led local without a working kitchen has a thinner daytime load, mostly cellar cooling, glass washing, lighting and a quiet afternoon, then a sharp evening spike for the wet trade. Its overlap with solar is lower, so it sits nearer the bottom of the band unless storage is added to carry midday generation into the evening.

Freehouse versus tenanted. Tenure decides who can install and who keeps the saving. A freeholder can size the array to the building’s full daytime load, claim the tax relief, and bank the full benefit, the strongest position for solar. A tied or leased tenant needs the pubco or landlord’s consent and a wayleave or licence to alter, and the economics turn on who pays the electricity bill and how long the lease runs. With minimum energy efficiency standards tightening on commercial property, many landlords now want the panels because they protect the value of the asset, so a landlord-funded or cost-shared route is increasingly realistic. The key is to settle who funds and who benefits before anything goes on the roof.

The evening-peak problem, and where a battery fits

The structural limit of solar for a pub is timing. Generation peaks at midday and fades through the afternoon, while a pub’s busiest, most power-hungry hours, evening service, late opening, weekend trade, fall after dark. Cellar cooling and refrigeration run through the night regardless, so a useful share of generation is self-consumed even on a quiet day, but the evening peak itself is grid-bound on a solar-only system.

This is where a battery changes the maths, and where it does not. A battery stores cheap midday solar and discharges it into the evening service peak, lifting self-consumption and pushing the offset toward the top of the range, or past it, for an evening-weighted site. For a wet-led pub whose whole trade is in the evening, storage is often what makes the case stack up at all. For a food-led pub with a strong daytime load, the panels are already well-matched and a battery is a useful add-on rather than a necessity. Storage adds capital, so it is worth modelling as a separate decision against your actual half-hourly profile rather than assuming every pub needs it.

An illustrative worked example

To see how this plays out, take an illustrative case, not a real client. A freehold food-led pub with a full kitchen, walk-in cold rooms and a busy lunch and evening trade pays around £41,000 a year for electricity, all of it bought from the grid. A 78 kW rooftop array (roughly 144 panels) generates in the order of 72,000 kWh a year. Because cellar cooling and kitchen refrigeration run through the daytime, self-consumption is high and the array offsets close to £18,500 of the annual bill, a little over 40 percent, for a payback near 5.2 years once year-one tax relief is taken into account. Adding a battery to shift midday generation into evening service would lift that offset further. A wet-led local on the same comparison, with a thinner daytime load, would offset nearer 25 to 30 percent on panels alone, which is exactly the case where storage does the heavy lifting. The figures are illustrative and depend entirely on your site, roof, load profile and tariff.

How to choose

The decision is not solar versus the grid, it is how much of your grid bill you want to convert into owned, price-locked generation. Staying fully grid-only keeps your capital free but leaves the whole bill exposed to every renewal. Solar plus grid cuts a quarter to nearly half of that bill and fixes the cost of the part it covers, which is why most pubs that can install end up doing so.

Work it in this order. If you are a freeholder with a strong daytime kitchen load, size the array to that load and the case is straightforward. If you are wet-led and evening-weighted, model solar with a battery together, the storage is what makes it work. If you are tied or leased, settle consent and who-funds-who-benefits with the landlord before sizing anything. In every case the sensible next step is to model it against your real half-hourly meter data rather than a rule of thumb. See the cost guide for the underlying numbers, the funding routes for the tax relief and finance that change the payback, and the savings calculator for an instant indicative figure. For the wider question of whether it stacks up for your specific site, read is solar worth it for pubs. When you are ready, request a free feasibility and we will model solar against your current grid bill for your pub.