Food & Beverage Manufacturing: Solar Panels for Manufacturing

Food and beverage manufacturing has one of the strongest load profiles for commercial solar of any UK industrial sub-sector. Refrigeration, chilling, ovens and process lines run close to 24/7, which produces a high, flat electrical baseload that solar generation can offset almost entirely as it is produced. Where many industrial sites see demand fall away outside a single day shift, a chilled or frozen food plant keeps drawing power around the clock, so a much larger share of every kilowatt-hour a rooftop array generates is used on site rather than exported at a low tariff. That high self-consumption is exactly what drives a fast payback. Add the fact that BRCGS and retailer audits increasingly ask suppliers to disclose their renewable-energy position, and on-site solar moves from a nice-to-have to a commercial requirement for many food and drink manufacturers.

Sizing solar for food and beverage manufacturing

A typical food and beverage manufacturing installation on our books runs from 400 kW to 1,200 kW, using roughly 750 to 2,200 panels and needing about 2,500 to 7,000 square metres of unobstructed roof. A system in that range generates around 370,000 to 1,100,000 kWh a year in UK conditions. Those figures are a starting point, not a quote. We size every system from at least 12 months of half-hourly meter data, modelling the load shift by shift rather than as an annual average, because a food plant's refrigeration and process draw at 3am tells us far more about the right system size than the roof area does.

The working rule is to install 70 to 90 percent of peak daytime demand to maximise self-consumption, and food and beverage sites tend to sit at the upper end of that band because their baseload is so flat. Roof-mounted plant, hygiene zones and cold-store layouts constrain where panels can go, so the design has to be worked around your building rather than dropped onto it. Key layout points we resolve before design sign-off include:

• Refrigeration, chilling and oven loads that run close to 24/7 and give exceptional self-consumption
• Roof-mounted plant and hygiene zones that constrain array layout and cable routing
• Ammonia or CO2 refrigeration plant that needs coordinated isolation during connection works
• Food-grade roofing membranes that require careful penetration detailing

Costs and payback

A food and beverage manufacturing system in the size range above typically represents a capital project of £300,000 to £980,000 fully installed. Simple payback for these sites lands around 5.5 years, driven by the high, flat baseload and the resulting strong self-consumption. Cost per kW falls as the system grows, so a larger plant tends to sit at the more efficient end of the range. The table below sets out the headline figures we work from.

Figure	Typical range
System size	400 kW to 1,200 kW
Panels	750 to 2,200
Roof area required	2,500 to 7,000 square metres
Project value (installed)	£300,000 to £980,000
Annual generation	370,000 to 1,100,000 kWh
Typical payback	Around 5.5 years

Most food and beverage installs are fully expensed in year one under the Annual Investment Allowance, which covers the first £1m of qualifying spend at 100 percent, so a limited company can see up to roughly a 25 percent effective tax saving in the first year. We share the full discounted-cash-flow model so your finance team can plug in their own tariff, discount rate and self-consumption assumptions rather than take a headline figure on trust.

Compliance and regulation

Food and beverage sites carry compliance requirements that a generic industrial installer often misses. Food-grade roofing membranes require careful penetration detailing, and where a ballasted flat-roof system is used we avoid penetrations altogether. BRCGS Food Safety Issue 9 references energy and environmental management, so a documented on-site generation position feeds directly into your audit evidence. Hygiene zoning can restrict cable routing and rooftop access, and any ammonia or CO2 refrigeration plant needs coordinated isolation during the connection works so that cold-chain integrity is never put at risk.

Alongside these sector points, the standard manufacturing rules apply. MCS commercial certification is required for Smart Export Guarantee eligibility, a G99 application is needed for connections above 17 kW per phase, and rooftop PV is increasingly expected to follow SPF1981 v3 fire-safety design as an insurer requirement. Rooftop PV on industrial buildings is generally covered by Permitted Development Rights, though we confirm planning status, roof structural capacity and DNO connection timescales as part of the feasibility study before any commitment.

A representative project

To show how these numbers come together, consider a representative chilled-ready-meals manufacturer running refrigeration, chilling and cooking lines on a near-continuous pattern, with a large single-storey production hall and around 4,500 square metres of usable membrane roof. Modelling from 12 months of half-hourly data points to a system of roughly 700 kW, around 1,300 panels, generating in the region of 640,000 kWh a year. With a flat overnight baseload from the cold stores, self-consumption sits high, so the great majority of that generation displaces grid import at the full daytime rate rather than being exported. The project value falls within the £300,000 to £980,000 band for the sub-sector, and payback comes out close to the 5.5-year figure the dossier records for food and beverage sites. This is a representative scenario built from the sector data, not a named client, and every real project is modelled from that site's own meter data.

Funding the project

Solar for a food and beverage plant does not have to compete with your production-line budget. Beyond a straight capital purchase, most sites we work with use a power purchase agreement with zero capex, or asset finance spread over 7 to 15 years that is typically EBITDA-positive from year one. Grant routes such as the Industrial Energy Transformation Fund and reliefs including capital allowances and Climate Change Agreements can also apply to energy-intensive food manufacturing. We set out the full picture on our grants and funding page and break down the numbers on our cost page so you can compare each route like for like.

Next steps

The fastest way to see whether solar stacks up for your plant is a desk-based feasibility study from your half-hourly meter data and roof drawings. Request a quote to get a sized and priced proposal, or run the numbers yourself first with our savings calculator. If your site sits across sub-sectors, it is worth reading how the economics differ for pharmaceutical manufacturing, where a 24/7 cleanroom baseload behaves similarly, and for general manufacturing plants, which share many of the same design and connection considerations.