Solar panels for manufacturers: Food & Drink Manufacturers

Load profile: near-24/7 refrigeration and ovens give a high, flat baseload.

If you run a food or drink production site, electricity is almost certainly your second or third largest controllable cost, and it behaves in a way that makes solar panels for food manufacturers one of the strongest capital cases in UK industry. Refrigeration, chilling, ovens, pasteurisers and washdown plant run close to around the clock, so your demand is high and flat rather than peaky. That flat baseload is exactly what a rooftop array wants to see, because it means most of what you generate is used on site the moment it is produced, at your full import rate, instead of being exported for a few pence.

Why the food and drink load profile pays back fastest

Payback on a food and drink array typically lands around 5.5 years, at the fast end of the manufacturing range. The reason is self-consumption. On a single-shift dry-goods site, solar might offset 30 to 60 percent of annual demand; on a chilled or frozen site running 24/5 or 24/7, self-consumption commonly reaches 80 to 90 percent because the refrigeration base never switches off. Every kWh you self-consume displaces grid electricity at roughly 22 to 32p; every kWh you export earns only the Smart Export Guarantee rate. So the flatter your load, the more of your generation lands on the high-value side of that split, and the shorter the payback.

We do not size from your roof area. We pull at least twelve months of half-hourly meter data and model your demand shift by shift, because that shows the true shape of your load across the day, the week and the season. A typical food and drink installation then falls between 400 kW and 1,200 kW, roughly 750 to 2,200 panels across 2,500 to 7,000 square metres of roof, generating around 370,000 to 1,100,000 kWh a year. We install to 70 to 90 percent of peak daytime demand so that generation stays on site rather than spilling cheap exports onto the grid.

Building the capital case your board will approve

The question a food manufacturer’s finance director asks is not “does solar work” but “does this capital beat the alternative uses”. We answer that with a full discounted-cash-flow model built from your own data: simple payback, IRR (typically 12 to 22 percent for a UK manufacturer), NPV at your own discount rate, and LCOE, which for a food site usually comes out at 4 to 7p/kWh against the 22 to 32p you pay the grid. You get the model, not just the headline, so your team can stress-test every assumption and drop it straight into your capital-appraisal process.

There are three routes to fund it, and we model all three against your current grid tariff so the board compares like for like:

• Outright purchase gives the best lifetime return. Solar PV is special-rate plant and machinery, so it does not qualify for full expensing, but the Annual Investment Allowance covers 100 percent of the first £1m of qualifying spend, giving a limited company up to roughly 25 percent effective tax relief in year one. See our cost guide for worked figures.
• Asset finance or a lease keeps the system on balance sheet, spreads the cost over 7 to 15 years, and is usually EBITDA-positive from year one, so it does not compete with your production-line budget.
• A power purchase agreement needs no capital at all: a third party owns the array and you buy the power it produces at a rate below your grid tariff, with a day-one saving and off-balance-sheet treatment.

Compliance a generic installer misses on a food site

Food and drink sites carry requirements a general contractor often does not price. Food-grade roofing membranes need careful penetration detailing, which is one reason a ballasted flat-roof system, needing no penetrations, is often the right answer. BRCGS Food Safety Issue 9 references energy and environmental management, so a documented on-site generation position feeds directly into your audit evidence rather than sitting outside it. Hygiene zoning can restrict cable routing and rooftop access, and ammonia or CO₂ refrigeration plant needs coordinated isolation during the connection works. We plan all of this around your production schedule.

The only unavoidable outage is the final grid connection, typically 4 to 8 hours, which we schedule inside a planned maintenance window, a weekend or a shutdown. Rooftop installation itself almost never requires a process stoppage. A G99 application to your Distribution Network Operator is required for any connection above 17 kW per phase, which covers effectively every food-site array, and the DNO study alone runs around 65 working days, so we submit it on day one to start the longest clock in the programme immediately.

Answering the retailer audit

For most food and drink manufacturers the trigger to act is no longer just the energy bill; it is the customer. The major grocers and their supply chains increasingly require Scope 2 emissions disclosure, and EcoVadis, CDP Supply Chain and SBTi-validated targets are turning into contract conditions rather than nice-to-haves. Every kWh of self-consumed solar reduces both your market-based and location-based Scope 2 emissions, and the generation data feeds straight into those submissions. On-site solar is one of the most visible and verifiable decarbonisation measures you can put in front of a retailer audit, which is why several of our food clients used the array to protect or renew a supply contract, not just to cut a bill.

A representative food and drink project

A ready-meals and chilled-foods producer near Leicester ran blast chillers, cold stores and ovens on a 24/5 pattern across a 3,900 square metre profiled-metal roof. Their half-hourly data showed a flat 320 to 360 kW daytime baseload, and a major retailer had made renewable-energy disclosure a condition of the supply contract. We sized a 480 kW array, about 890 panels, to 82 percent of peak daytime demand. First-year generation reached 445,000 kWh, self-consumption came in at 86 percent, and the annual saving was around £101,000 in year one, escalating as grid prices rise. Simple payback landed at 5.4 years, funded on asset finance and EBITDA-positive from month one, and the generation data fed the retailer’s BRCGS and CDP audit.

What to do next

If you can send us twelve months of half-hourly meter data and your roof drawings, we can produce a sized and priced feasibility study, with generation forecast and modelled IRR, within seven working days, and no site visit is needed for that first proposal. If the numbers work, our structural and electrical engineers visit for a single day, after which you get a fixed-price proposal with full yield modelling and a financial model your finance team can own. You can compare the grants and funding routes and try the savings calculator first, or go straight to a free feasibility study. We will be honest if your site does not suit solar, and tell you so before you spend anything.