solar panels for manufacturers in Cardiff

Serving Cardiff and the wider South Glamorgan area, including Penarth, Caerphilly, Barry.

Why Cardiff’s manufacturers are looking at solar

Across Cardiff and the wider South Glamorgan area, manufacturers face the same squeeze — industrial power costs in Wales have risen sharply — which is why so many Cardiff sites are now modelling rooftop solar. On-site solar suits Cardiff manufacturers precisely because the demand profile is daytime-heavy; across South Glamorgan, process loads and lines run hardest under the midday sun a Cardiff array captures. Most of what a Cardiff array generates is consumed on site at your full import rate of roughly 22 to 32p, rather than exported for a few pence, and that is what makes the Cardiff numbers work.

Expect a 50-to-250-staff Cardiff site to face a grid bill near £38,000 a year; the energy-intensive South Glamorgan plants pay far more again. Against that bill, on-site solar offsets 30 to 60 percent of annual demand on a single-shift Cardiff operation and 70 to 90 percent on a continuous one, at a levelised cost of 4 to 7p per kWh versus the 22 to 32p Cardiff industrial users pay the grid. We never size from roof area; every Cardiff array is modelled from at least twelve months of your half-hourly meter data.

Cardiff’s industrial geography

The manufacturing base around Cardiff clusters into a handful of well-defined estates, and that is where the strongest rooftop solar opportunities sit. Locally that includes Cardiff Bay Business Park, Wentloog Industrial Estate, Capital Business Park, Hadfield Road and Pengam Green, where portal-frame and profiled-metal-roof units offer the large, unobstructed roof areas a Cardiff array needs. Manufacturers across Cardiff Bay Business Park and Wentloog Industrial Estate typically carry the daytime process loads — machining, moulding, packing, refrigeration or process heat — that give solar its high self-consumption.

Beyond the named Cardiff estates, the wider South Glamorgan footprint takes in Penarth, Caerphilly, Barry, Newport and Pontypridd, and many Cardiff manufacturers run production across more than one of those areas. We deliver consistent design, installation and reporting across the whole Cardiff and South Glamorgan area, which matters when a customer audit wants group-wide renewable data rather than a single Cardiff site.

The grid picture: connecting in Cardiff

The Distribution Network Operator for Cardiff is National Grid Electricity Distribution, and in a Cardiff solar project the grid connection is almost always the longest single item. A G99 application is required for any connection above 17 kW per phase — effectively every manufacturer-scale array in Cardiff — and the National Grid Electricity Distribution technical study alone commonly runs around 65 working days, with actual connection dates of 6 to 18 months on constrained parts of the Wales network. We submit the National Grid Electricity Distribution application on day one, alongside the Cardiff structural survey, so the connection clock starts immediately. Where export capacity into the Cardiff network will not arrive in time, we phase the design with battery storage so your Cardiff site gets immediate self-consumption while the export agreement catches up.

Local cost, funding and a worked example

A 565 kW rooftop array on a Cardiff-area manufacturer, sized to about 84 percent of peak daytime demand, would generate roughly 517,000 kWh a year, self-consume around 84 percent of it, and save in the region of £124,000 a year at current industrial grid prices, for a modelled simple payback near 5.4 years. In more detail, that 565 kW Cardiff system is roughly 1,045 panels across about 3,100 square metres of clear roof, generating in the order of 517,000 kWh a year and displacing around 107 tonnes of CO₂. It is a representative figure; the real Cardiff number comes from your meter data and your tariff.

The way a Cardiff site pays for its array is the national picture with a South Glamorgan twist or two. Solar PV is special-rate plant and machinery, so it does not qualify for full expensing; the route is the Annual Investment Allowance, which expenses 100 percent of the first £1m of qualifying spend in year one and gives a limited company up to roughly 25 percent effective relief. Energy-intensive Cardiff sites holding a Climate Change Agreement improve their performance against target with every self-consumed unit while cutting Climate Change Levy and network charges. We model outright purchase, asset finance and a PPA side by side for your Cardiff project. See our cost guide and grants and funding page.

Roof condition on Cardiff’s industrial stock

The biggest technical variable on a Cardiff site is usually the roof, not the panels. A good deal of the industrial stock across Cardiff Bay Business Park and Wentloog Industrial Estate predates 2000, and pre-2000 Cardiff roofs almost always need an engineer’s sign-off before any ballast or rail loading goes on. Some older South Glamorgan units still have asbestos-cement roofs, which will not take PV and have to be re-covered with a modern roof before any array goes on. That is often an opportunity rather than a blocker: because a 25-year panel warranty outlasts most new industrial roofs, the Cardiff solar case can unlock a board-approved re-roof deferred for years, funded inside one capital envelope. Every Cardiff project starts with a structural and roofing survey so none of this surprises you after contract.

Batteries, night shifts and red-band charges in Cardiff

For most Cardiff manufacturers on a daytime or single-shift pattern, self-consumption is already strong enough that a battery is a secondary optimisation. It becomes worth modelling where a Cardiff site runs a genuine night shift, where National Grid Electricity Distribution network charges load heavily into the DUoS red band, or where you want to trade flexibility. A battery lets a Cardiff operator store daytime generation and discharge it into the dark hours or out of the expensive red-band window, and on some South Glamorgan sites it opens a flexibility revenue stream. We model the battery business case alongside the PV for every Cardiff site rather than bolting one on by default.

Scope 2 reporting and Cardiff’s supply chains

For a growing share of Cardiff manufacturers, the trigger is not only the bill but the customer. Being part of advanced manufacturing, automotive, steel and food production means many Cardiff and South Glamorgan firms sit in supply chains where an OEM, a national grocer or a large industrial buyer flows Scope 2 and Scope 3 requirements down to suppliers. EcoVadis, CDP Supply Chain and SBTi-validated targets increasingly appear as contract conditions. Every kWh of self-consumed solar cuts a Cardiff site’s Scope 2 emissions and produces data that feeds those submissions, so for a Cardiff manufacturer an on-site array is one of the cleanest, most verifiable ways to answer a customer audit and protect a contract.

Cardiff Council, Cardiff One Planet Strategy and what it means

Cardiff Council has a 2030 net zero target, set out in Cardiff One Planet Strategy. Welsh Government Net Zero by 2030 for public sector creates strong demand. Welsh Business Wales scheme provides SME grants. For a Cardiff manufacturer that matters in two practical ways. First, planning: rooftop solar on a Cardiff industrial building is generally Permitted Development under Class A Part 14 of the GPDO 2015, subject to the 200 mm projection limit and excluding listed or conservation-area properties, so most Cardiff installs need no planning application. Second, procurement: as public bodies and large customers around Cardiff tighten their own Scope 2 and supply-chain requirements, an on-site array is one of the most visible ways for a Cardiff site to stay competitive on tenders.

Areas we cover around Cardiff

We deliver solar panels for manufacturers across Cardiff and the wider South Glamorgan area, including Penarth, Caerphilly, Barry, Newport and Pontypridd, and out toward Newport, Swansea, Bristol. Each has its own council and net-zero commitments, and many of our Cardiff clients run production across more than one of them. Whether you operate a single unit on one of Cardiff’s industrial estates or a multi-site South Glamorgan portfolio, we model, install and report to the same standard.

Frequently asked questions about Cardiff manufacturer solar

How long does a grid connection take in Cardiff? National Grid Electricity Distribution typically quotes around 65 working days for the technical study, with actual connection on constrained parts of the Wales network running 6 to 18 months for installs above 100 kW. We submit the Cardiff G99 application on day one and phase with battery storage where export capacity is delayed.

How much could a Cardiff manufacturer save? It depends on your load, tariff and self-consumption, but as a representative figure for Cardiff, a 565 kW rooftop array on a Cardiff-area manufacturer, sized to about 84 percent of peak daytime demand, would generate roughly 517,000 kWh a year, self-consume around 84 percent of it, and save in the region of £124,000 a year at current industrial grid prices, for a modelled simple payback near 5.4 years. We model your exact Cardiff number from your half-hourly meter data first.

Do we need planning permission in Cardiff? In most cases, no. Rooftop solar on a Cardiff industrial building is generally Permitted Development, subject to the 200 mm projection limit and excluding listed buildings and conservation areas. We confirm your Cardiff site’s planning status in the feasibility study.

Get a free Cardiff feasibility study

The starting point for any Cardiff site is your half-hourly data and roof drawings; from those we return a costed Cardiff feasibility study, with self-consumption and IRR modelled, inside seven working days. If the numbers work, our structural and electrical engineers visit your Cardiff site for a single day before we issue a fixed-price proposal and a financial model your finance team can own. If your Cardiff site does not suit solar, we will tell you so before you spend anything.