solar panels for manufacturing in Cardiff

Cutting energy costs for Cardiff industry

Wentloog runs a rising electricity bill through every food line, engineering bay and process hall along its eastern corridor, and that bill is what brings most Cardiff operators to solar. A mid-size manufacturing site in the city now spends in the region of £38,000 a year on grid power, and that figure has moved in one direction since 2021. Rooftop generation puts a lever under it. Electricity produced on your own roof and used on site is worth your full import rate, so every unit you self-supply is a unit you no longer buy at 18 to 32p.

A second reason has nothing to do with the meter. Buyers now audit their supply chains, and retailers, automotive tiers and the public bodies that dominate Welsh procurement increasingly ask for renewable-energy disclosure before they renew a contract. On-site solar gives you a Scope 2 reduction you can evidence in writing, which is often the cleanest way to satisfy an EcoVadis or CDP request. The bill saving and the audit answer come from the same array.

For a plant manager the sequence is short. Send us twelve months of half-hourly meter data and a roof drawing, we model what your specific load can absorb, and you get a sized, priced proposal for your board. You can request a quote to start, or read the full cost breakdown first.

Cardiff’s industrial geography

Cardiff’s manufacturing does not sit in the city centre. It clusters along the eastern and southern fringe, and each cluster earns its place here for a different reason.

Wentloog Industrial Estate is the heavy end. Rail-linked and packed with food and beverage processing, distribution and engineering, it runs the flat, machine-driven loads that make solar economics work hardest, because refrigeration and process plant pull power steadily through the middle of the day. Capital Business Park, also at Wentloog, adds large clear-span sheds mixing logistics and food production, the kind of wide unobstructed roof that takes a big array with minimal design compromise. Cardiff Bay Business Park sits to the south with lighter engineering and technology units in modern buildings, where clean rail-fixed roofs make installation straightforward. Pengam Green rounds out the picture with a further pocket of engineering and light industrial occupiers, many already reporting into customer sustainability scorecards.

What ties these estates together is the shape of their electrical demand rather than the shape of their roofs. A plant drawing power for compressors, chillers, ovens and machining runs its heaviest load in daylight hours, which is exactly when a rooftop array generates. That overlap is the whole case, and 24/5 food and process sites at Wentloog sit at the higher end of it. Whether you run food and beverage manufacturing, engineering and metalworking, chemical and process manufacturing or a broader manufacturing plant, the roof over your production floor is almost certainly under-used.

Local policy, grants and the grid

Cardiff Council has committed to net zero by 2030, framed by its Cardiff One Planet Strategy, and that date matters commercially rather than symbolically. The Welsh Government target of net zero across the public sector by 2030 drives sustained local demand, and because so much of the Welsh supply chain feeds public bodies, that pressure cascades down to private manufacturers who want to keep those contracts.

Funding sharpens the case. Business Wales runs SME grant support that can help build the business case for on-site generation, and it sits alongside UK-wide relief such as the Annual Investment Allowance, which lets most manufacturers fully expense a solar install in year one for up to roughly 25 percent effective tax relief. Our grants and funding page sets out which schemes stack and where the current windows are.

Grid connection is the item that needs the earliest attention. Cardiff sits in National Grid Electricity Distribution’s Wales region, and any array above 17 kW per phase needs a G99 connection agreement, which covers effectively every manufacturing system. Study responses commonly run to around 65 working days, and firm connection dates can land 6 to 18 months out on constrained parts of the network. To stop that stalling the project, we lodge the DNO application at the same time as the structural survey, and where export capacity looks slow to arrive we phase battery storage into the design so you get self-consumption immediately while the export agreement follows. Planning is rarely the blocker. Permitted development rights generally cover rooftop PV on industrial buildings, so unless your site is listed or in a conservation area, formal permission is usually not needed.

Sizing and paying for a Cardiff system

Get the size right and everything else follows, so we size to your daytime load rather than your roof. Reading twelve months of half-hourly data tells us how much power the site actually pulls while the sun is up, and we design the array to cover the bulk of that without spilling large surpluses cheaply onto export. For a typical Cardiff manufacturer that points to something between 200 kW and 800 kW, a project generally worth £190,000 to £680,000, with cost per kW falling as the system grows and simple payback landing in the 5 to 7 year band for a well-matched install.

Financing rarely comes out of the production budget. Most Cardiff installs run through a power purchase agreement, where a third party funds and owns the system and you buy the output below your grid tariff with no capital outlay, or through asset finance that spreads the cost over 7 to 15 years and is usually cash-positive from year one. A cash purchase captures the fastest return where the capital is available. We model all three so your finance team compares like for like, and you can run a rough shape yourself on the savings calculator first.

A representative food and beverage manufacturer scheme in Cardiff

Picture a food and beverage manufacturer on the Wentloog corridor, running chilling, packing and process lines across a long daytime pattern under a 5,700 square metre roof. Its energy bill had climbed well past the local mid-size average, and a major grocery customer had begun asking for renewable-energy disclosure at contract renewal.

A roof of that footprint suits a 950 kW array, around 1760 panels. Against a high, refrigeration-led baseload, a system like this generates roughly 902,000 kWh a year and reaches about 77 percent self-consumption, because so much of the plant’s demand falls squarely inside the generation window. The bill saving comes to around £132,000 a year, with simple payback near 5.6 years, and the verifiable Scope 2 cut goes straight in front of the customer audit that prompted the enquiry. These figures are representative of the food and beverage manufacturing sector rather than a named client, and every real proposal is modelled from your own meter data.

Neighbouring areas we work in

Our Cardiff coverage runs across the CF postcode districts, from the city centre out to Wentloog and Pengam Green in the east and down to Cardiff Bay in the south. Beyond the boundary we install for manufacturers in Penarth, Caerphilly, Barry, Newport and Pontypridd, and we regularly cross the Severn to work with sites in Bristol.

Sit anywhere in that footprint and the first step costs nothing: a desk-based feasibility study from your half-hourly data and roof drawings, with a sized, priced proposal back within a few working days. Browse the full locations index for the wider area we cover, or get in touch for a quote to open a Cardiff project.