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Cardiff Council

Commercial Solar and Electrical in Cardiff

Densest commercial office-roof stock in Wales with MEES B-by-2030 driving demand

Postcodes
CF10, CF24, CF11
Local authority
Cardiff Council
Drive from HQ
44 mi · 55 min
Solar yield
940 kWh/kWp
CF10, CF24, CF11 55 min from our Swansea base 940 kWh/kWp solar yield Commercial energy intensity: Very high Primary service area

Serving Cardiff

Cardiff is the capital of Wales, with a 2021 census population of 362,756 and the largest commercial office estate in the principality. Major employers concentrated inside the central business district include Admiral Group with its FTSE 100 headquarters at Capital Tower, Legal and General, the BBC Cymru Wales headquarters at Central Square, Principality Building Society, NHS Wales at the University Hospital of Wales, Cardiff University, and the Motorpoint Arena Cardiff.

Commercial estate runs through several distinct districts. Capital Waterside at Cardiff Bay, the Cardiff Central Enterprise Zone, Cardiff Business Park at Llanishen, Celtic Business Park, Cardiff Gate and Cardiff Bay each host a different part of the office and light-industrial tenant base. The city carries the densest commercial office-roof stock in Wales, and many of those buildings fall under non-domestic MEES obligations that will require EPC Band B by 2030 or face letting restrictions.

FLD has delivered the Cardiff Crown Courts electrical refurbishment project, approximately £50,000 in value, covering the entrance and foyer with structured cabling to Cat6a, fire alarm interfacing, emergency lighting to BS 5266, and single NICEIC Approved Contractor sign-off. That project is our reference case for public-sector and secure-building commercial electrical work in the city.

Landmarks anchor the tourism and cultural economy. Cardiff Castle, the Principality Stadium, the Senedd at Cardiff Bay, the Cardiff Bay Barrage and Llandaff Cathedral each draw significant visitor numbers.

Regeneration pipeline through 2024 to 2026 is busy. Central Square completion, Callaghan Square Phase 2, the Cardiff Parkway private station at proposal stage, and the £500 m Cardiff Crossrail proposals together produce a substantial upstream pipeline of commercial rooftop stock.

At 940 kWh/kWp PVGIS yield (the lowest of our core coverage thanks to higher urban haze), a 120 kWp multi-tenant Callaghan Square rooftop generates 113,000 kWh a year. With 65% self-consumption at 28p/kWh and a tenant PPA structure, first-year benefit across tenants sits at approximately £23,000 with zero landlord capex.

Drive time from Swansea is 55 minutes. Cardiff is a strategic commercial focus for FLD across both solar and electrical scope.

Commercial sites and business parks

Very high energy intensity

Capital Waterside

Cardiff Central Enterprise Zone

Cardiff Business Park Llanishen

Celtic Business Park

Cardiff Gate

Cardiff Bay

Commercial solar estimate — Cardiff

100 kWp reference system at 940 kWh/kWp

Modelled at 27p/kWh blended import, 15p/kWh SEG export, 80% self-consumption for very high energy intensity site.

94,000
kWh/yr
Annual generation
£23,124
per year
Annual saving
3.7
years
Simple payback
2.8
years (AIA)
Post-tax payback
Indicative only. Based on PVGIS irradiance data for Cardiff. Actual figures depend on roof orientation, shading and tariff. Request a detailed survey.
Domestic solar

Housing stock in Cardiff

Victorian terraces, interwar semis, Cardiff Bay apartments, modern estates

A typical 4 kWp domestic install here generates 3,760 kWh/yr. With 40% self-consumption at 30p/kWh and 60% SEG export at 15p/kWh, first-year saving is approximately £790.

940
kWh/kWp/yr
PVGIS irradiance

Local landmarks and context

  • Cardiff Castle
  • Principality Stadium
  • Senedd
  • Cardiff Bay Barrage
  • Llandaff Cathedral

Major employers we work with

  • Admiral Group
  • Legal & General
  • BBC Cymru Wales
  • Principality Building Society
  • NHS Wales UHW
  • Cardiff University

Recent local developments

  • Central Square completion
  • Callaghan Square Phase 2
  • Cardiff Parkway
  • £500m Cardiff Crossrail proposals
From the blog

Guides for Cardiff

Location GuidesCardiff

Commercial solar Cardiff Bay and CF24: public sector estate, PSNI and Salix Wales

Commercial solar for Cardiff's public sector estate -- Welsh Government buildings in CF10, NHS Wales in CF14, Cardiff Council schools in CF24 and Salix Wales interest-free finance.

5 min
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Location GuidesCardiff

Domestic solar panels Cardiff: CF3 to CF24 residential guide, battery storage and EV charging

Domestic solar payback, battery storage integration and EV charger pairing for Cardiff homeowners across CF3, CF5, CF10, CF14, CF23 and CF24 postcodes.

5 min
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Location GuidesCardiff

Commercial solar Cardiff: the CF postcode buyer's guide

Solar yields, business parks, planning rules and worked payback examples for commercial solar PV across Cardiff and the CF postcodes in 2026.

6 min
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Sector guides

Commercial solar sectors near Cardiff

Sector Guides

Commercial solar for South Wales offices: PPA structures, green lease obligations and 9am--5pm self-consumption

How South Wales office occupiers and landlords are using commercial solar to reduce energy costs and meet green lease obligations -- with PPA vs outright purchase analysis, 65% daytime self-consumption models and EPC compliance context.

5 min
Read
Sector Guides

Commercial solar for South Wales warehouses: logistics, 3PL operators and big-shed payback

How South Wales warehousing and logistics operators are using commercial solar to cut energy costs across large roof areas -- with payback models for 300 kWp to 750 kWp installations on distribution sheds.

5 min
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FAQ

FAQs for Cardiff

A Power Purchase Agreement is a financing arrangement where we fund and install a rooftop solar system at no upfront cost. Your business buys the electricity the system generates at a fixed, RPI-indexed rate that is lower than your grid tariff. The PPA typically runs 10 to 25 years. At the end you can extend, buy out at a pre-agreed residual value, or have the system removed. It suits businesses that want immediate savings without capital outlay and that are credit-worthy with a stable site.
At 30p/kWh grid electricity, a 100 kWp system generating 95,000 kWh/yr with 70% self-consumption delivers around £24,000 of year-one benefit against c. £85,000 capex, a 3.5-year simple payback. Under Annual Investment Allowance first-year 100% relief, post-tax payback is closer to 2.6 years. South Wales yields 940 to 985 kWh/kWp/year depending on postcode, comfortably enough for commercial solar to be cashflow positive from month one with a PPA.
NICEIC is the UK's most recognised certification body for electrical installers. An NICEIC Approved Contractor has been audited on competence, quality management and BS 7671 compliance. It gives you an insurance-backed warranty on the installation work we sign off, and meets the Competent Person scheme requirements for Building Regulations Part P.
Yes, depending on organisation type. Welsh SMEs and public bodies can access the Welsh Government Energy Service, Ynni Cymru Capital Grants (approximately £10 m in 2026-27, £25,000 to £1 m per project) and Development Bank of Wales Green Business Loans. Welsh public-sector bodies use Salix Wales Funding Programme rather than the English Public Sector Decarbonisation Scheme. Farms may be eligible under Farming Connect. Always check current-year terms before committing.
Once DNO G99 connection approval is in place and materials are on site, a typical 100 kWp rooftop install takes 5 to 8 working days. The critical-path item is usually the NGED Type A connection approval, which is 3 to 6 months in South Wales in 2026. We manage that application as part of our scope.

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Speak to Paul directly. Most quotes turn around within five working days of a site survey.

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