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Pembrokeshire CC

Commercial Solar and Electrical in Pembroke and Pembroke Dock

Gas plant, offshore wind supply base and hydrogen cluster all within ten miles

Postcodes
SA71, SA72
Local authority
Pembrokeshire CC
Drive from HQ
72 mi · 105 min
Solar yield
985 kWh/kWp
SA71, SA72 105 min from our Swansea base 985 kWh/kWp solar yield Commercial energy intensity: Very high

Serving Pembroke

Pembroke and its sister settlement Pembroke Dock share the SA71 and SA72 postcodes and together form one of the most concentrated energy-infrastructure clusters in the UK. Town population is around 7,500. The site has been strategically important since Pembroke Castle was built, notably as the birthplace of Henry VII in 1457.

Employers are dominated by heavy energy and engineering. RWE Pembroke Power Station is a 2,220 MW combined-cycle gas turbine site which was the largest gas-fired power plant in Europe when commissioned in 2012. Pembroke Dock Marine is the Celtic Sea floating offshore wind supply cluster anchor. Irish Ferries operates from Pembroke Dock, providing ro-ro ferry services to Rosslare.

Commercial estate is divided between the Pembroke Dock port estate itself and the emerging Pembroke Dock Marine business park. The Celtic Freeport designation of 2023 covers this entire cluster and brings significant tax-advantaged procurement appeal.

Landmarks include Pembroke Castle, Pembroke Dock Heritage Centre and the port frontage itself. The emerging identity of the area is unusual: within a ten-mile radius a visitor encounters a 2,220 MW gas plant, an offshore wind supply base and an emerging hydrogen cluster, each under active development through 2024 to 2026.

Celtic Freeport activation, Celtic Sea floating offshore wind Round 5 leasing, and hydrogen cluster proposals (HyPER and HyNet satellite schemes) together produce an unusually specific and well-funded commercial demand pipeline. The supply chain for every one of those programmes includes tier-2 and tier-3 companies operating at Pembroke Dock Marine.

At 985 kWh/kWp PVGIS yield (matching Milford Haven across the water), a 750 kWp Pembroke Dock Marine tenant rooftop generates 738,750 kWh annually. With 70% self-consumption at 27p/kWh blended, first-year benefit is approximately £163,000 on £600,000 capex. Simple payback 3.7 years, post-tax payback 2.7 years.

Drive time from Swansea is 105 minutes, which we manage through scheduled Pembrokeshire days that combine Haverfordwest, Milford Haven and Pembroke into a single trip.

Commercial sites and business parks

Very high energy intensity

Pembroke Dock port estate

Pembroke Dock Marine business park

Commercial solar estimate — Pembroke

100 kWp reference system at 985 kWh/kWp

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

98,500
kWh/yr
Annual generation
£24,231
per year
Annual saving
3.5
years
Simple payback
2.6
years (AIA)
Post-tax payback
Indicative only. Based on PVGIS irradiance data for Pembroke. Actual figures depend on roof orientation, shading and tariff. Request a detailed survey.
Domestic solar

Housing stock in Pembroke

Georgian town centre, Victorian terraces, dock-worker housing

A typical 4 kWp domestic install here generates 3,940 kWh/yr. With 40% self-consumption at 30p/kWh and 60% SEG export at 15p/kWh, first-year saving is approximately £827.

985
kWh/kWp/yr
PVGIS irradiance

Local landmarks and context

  • Pembroke Castle
  • Pembroke Dock Heritage Centre

Major employers we work with

  • RWE Pembroke Power Station
  • Pembroke Dock Marine
  • Irish Ferries

Recent local developments

  • Celtic Freeport activation
  • Celtic Sea floating offshore wind Round 5
  • HyPER and HyNet hydrogen
From the blog

Guides for Pembroke

Location GuidesPembroke

Commercial solar Pembroke: SA71 tourism economy, hospitality payback and conservation planning

Commercial solar for Pembroke SA71 -- tourism and hospitality payback models, castle town conservation planning for commercial properties, Pembroke Dock industrial context and SP Manweb G99 timelines.

5 min
Read
Location GuidesPembroke

Domestic solar Pembroke: SA71 walled town planning, Celtic Freeport residential and 990 kWh/kWp yield

Domestic solar for Pembroke SA71 -- walled town listed building consent, Pembroke Dock new-build payback, Pembrokeshire's 990 kWh/kWp yield advantage and Celtic Freeport residential growth context.

4 min
Read
Location GuidesPembroke

Commercial solar Pembroke and Pembroke Dock: Celtic Sea offshore wind supply chain and the SA71 energy cluster

Commercial solar for the Pembroke Dock Marine offshore wind supply chain, Celtic Freeport enhanced allowances, RWE and hydrogen cluster context across SA71 and SA72.

5 min
Read
Sector guides

Commercial solar sectors near Pembroke

Sector Guides

Industrial solar PV in South Wales: large-scale rooftop systems, G99 connections and battery integration

Industrial-scale solar PV for South Wales heavy industry -- large rooftop systems above 500 kWp, G99 Type B and C connection process, battery storage for demand peak shaving, and DNO constraint management on the NGED and SP Manweb networks.

5 min
Read
Sector Guides

Commercial solar for South Wales factories: Tata supply chain, ESOS compliance and AIA payback

How South Wales manufacturers are using commercial solar to cut electricity costs, meet ESOS Phase 4 obligations and satisfy Scope 3 reporting -- with payback worked examples from 250 kWp to 500 kWp.

5 min
Read
FAQ

FAQs for Pembroke

Yes. The Celtic Freeport, designated in 2023 and covering Milford Haven and Port Talbot, sits squarely inside our core coverage. We have active engagement with supply-chain tenants on rooftop solar and industrial electrical works across both port clusters, and we hold ConstructionLine accreditation for tier-1 main-contractor procurement frameworks operating inside the Freeport tax-advantaged zones.
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.
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.
G99 is the Engineering Recommendation governing how generation equipment connects to the UK distribution network. For commercial solar above 16 A per phase, you need G99 approval from your District Network Operator before export. In South Wales that is National Grid Electricity Distribution (NGED, formerly Western Power Distribution). Type A connections are the standard sub-1 MW route, typically 3 to 6 months in 2026.
Yes. Typical FLD scope covers LV distribution, SCADA and BMS containment, lighting, fire alarm, CCTV, access control, intercom and data, all under a single NICEIC Approved Contractor sign-off. Reference project: Cardiff Crown Courts refurbishment, approximately £50,000.

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