Energy construction companies in Wales

201 companies across Wales working in the energy sector.

167 of these 201 companies file accounts at Companies House, with a median reported or estimated turnover of £1.1m, and 137 hold at least one accreditation, most often MCS. All 201 are active on the register, and 59 were incorporated in the last three years.

• A Ac Electrical & Renewables Ltd Wrexham · Electrical · 1-9 employees

  AC Electrical & Renewables Ltd provides professional electrical installation and renewable energy services across Wrexham and North Wales, serving dom

• A Aldustria Newport · Solar PV

  Aldustria is an end-to-end developer and operator of grid-scale battery energy storage sites across the UK.

• A All Secure Doors Ltd. Merthyr Tydfil · Security systems

  All Secure Doors Ltd specialises in the design, manufacture and installation of certified steel door systems for utilities, industrial, commercial and

• A Alpha Energy Group Ltd Llanelli · Insulation · 1-9 employees

  CT ECO LTD installs free heating and insulation upgrades through ECO4, GBIS, and LA Flex grants, helping households save energy and reduce carbon emis

• A Alpha Renewables Usk · Solar PV · 1-9 employees

  Alpha Renewables specialises in the sale and installation of renewable energy products, including solar panels, battery storage, and EV charging point

• A Altum Organisation Ltd Cardiff · Solar PV · 10-49 employees

  Expert solar PV installation, battery storage & EV chargers across UK. Premium energy upgrades for homes with 500+ installations, £150k-£250k annual s

• A Aneurin Thomas Plant (ATP) Hire Ltd Camarthen · Civil engineering · 1-9 employees

  Aneurin Thomas Plant (ATP) Hire Ltd is a civil and engineering contractor specialising in gas, water, electricity, and fibre optic installations using

• A Anglesey Solar & Electrical Llangefni · Solar PV · 10-49 employees

  Anglesey Solar & Electrical Ltd are experts in solar installs and reliable electricians serving North Wales. They offer domestic and commercial solar

• A APH Solar Seed Cardiff · Solar PV

  APH Solar Seed offers smart solar and battery energy solutions for residential and commercial properties, delivering reliable, efficient renewable ene

• A Ashe Renewables Colwyn Bay · Solar PV · 1-9 employees

  Ashe Renewables offers solar panels, battery storage, air source heat pumps, and EV chargers to future-proof homes and businesses, helping reduce bill

• A Austwel Ltd Milford Haven · Civil engineering · 50-249 employees

  Austwel Ltd is a civil engineering contractor based in Milford Haven, Pembrokeshire, operating across the UK, specialising in Oil, Gas, and Renewable

• A Awen Futures Ltd Cardiff · Electrical

  Awen Futures focuses on ERP consulting, AI compute, and sustainability, aiming to integrate natural intelligence into business systems and build a sus

• B Biogas Solutions Ltd. Chepstow · Design & build

  Specialist innovators in flexible membrane biogas & syngas storage systems, designing, manufacturing, and installing worldwide.

• B BIOSOL RENEWABLES UK LTD Ammanford · Heating & ventilation · 10-49 employees

  Biosol Renewables UK Ltd designs, supplies, installs and maintains biomass boilers for commercial premises, offering environmentally friendly heating

• B Black Mountain Fire Ltd Llandeilo · Fire protection · 1-9 employees

  Black Mountain Fire are expert fire safety consultants dedicated to protecting businesses and families. Offering fire engineering, risk assessments, a

• B Bs Renewables Ltd Pontypool · Solar PV · 1-9 employees

  Pontypool's local solar panel installers. Domestic & commercial solar, battery storage, air source heat pumps, insulation, ventilation across South Wa

• C C. & P. Engineering Services Ltd Swansea · Electrical · 50-249 employees

  Specialist Electrical, Control and Instrumentation (EC&I) services for hazardous and non-hazardous areas. Design, construction, maintenance, complianc

• C C&T Smart Energy Group Neath · Solar PV · 10-49 employees

  TrustMark-certified solar PV, battery storage, heat pump, boiler and insulation installers in South Wales & South West England. Flexible finance avail

• C Cambrensis Civil Engineering Ltd Abergavenny · Civil engineering · 10-49 employees

  Cambrensis is a Welsh civil engineering company operating as both Principal Contractor and Subcontractor across Wales, the M4 Corridor and the South W

• C Capital Hydraulic Services Ltd Bridgend · Utilities · 1-9 employees

  Capital Hydraulic Services offers hydraulic hose replacement, repairs, and maintenance in Bridgend and a 50-mile radius. With over 20 years of experie

• C Cardiff Demolition Company Ltd Cardiff · Demolition

  Cardiff Demolition is an NFDC accredited specialist providing demolition, dismantling, site reclamation and remediation services across the UK. They h

• C Carter Sustainable Construction Ltd Bridgend · M&E contracting · 10-49 employees

  Carter Sustainable Construction Limited are Mechanical / Electrical Contractors specialising in green turnkey projects, photovoltaics, heat pumps, and

• C Ccr Energy Ltd Barry · Demolition · 1-9 employees

  CCR Energy Limited is pioneering a transformative path towards a new low carbon future at Aberthaw, reshaping the Cardiff Capital Region.

• C Celtic Electrical Services Ltd Bridgend · Electrical · 10-49 employees

  Celtic Electrical Services Limited is an experienced electrical contractor specialising in commercial and industrial installations across the UK. They

• C Celtic Green Energy Ltd Llanelli · Solar PV · 1-9 employees

  Celtic Green Energy provides commercial solar panels, battery storage, and EV charging solutions for Welsh businesses. Reduce energy costs, stabilise

• C Channel Electrical Systems Ltd Penarth · Electrical · 10-49 employees

  Channel Electrical is a certified installer specialising in renewable energy technologies and a wide range of electrical services for homes and busine

• C Chester Sparks Electrical Services Ltd Wrexham · Electrical

  Chester Sparks Electrical Services Ltd: Trusted UK-wide electrical contractor specialising in industrial, commercial, and domestic work. Safe installa

• C City Energy Llanishen · Heating & ventilation · 50-249 employees

  City Energy offers accredited courses for the renewable energy sector, including heat pumps, Solar PV, and EV Chargers. Providing quality services sin

• C Cmb Renewables Ltd Cardiff · Air conditioning · 1-9 employees

  CMB Renewables provides integrated climate and energy solutions, including air conditioning installation, maintenance, and renewable energy systems li

• C CMC Electrics Ltd Cowbridge · Electrical · 1-9 employees

  CMC Electrics Ltd is a South Wales-based company specialising in heat pumps, solar PV, battery storage, electrical installations, and ventilation. The

• C Complete Solar Services Ltd Vale Of Glamorgan · Solar PV · 1-9 employees

  Complete Solar Services Ltd offers expert solar panel installation and maintenance, providing bespoke sustainable energy solutions for homes and busin

• C Compton Developments Ltd Swansea · House builder · 1-9 employees

  Compton Group is primarily a property development and investment company with offshoot businesses. It has built a significant portfolio of ground rent

• C Conren Resin Flooring Ltd Rhyl · Flooring · 1-9 employees

  Specialists in resin flooring, screeds, waterproofing, and concrete repair. Nationwide installer with over 30 years of experience, serving main contra

• C Coretech Innovations Ltd Cardiff · EV charging

  CoreTech Innovations delivers reliable, standards-aligned EV charging solutions for homes, public spaces, and commercial environments, shaping a smart

• C Cp Electrical & Renewables Ltd Penarth · Electrical

  CP Electrical & Renewables Ltd: Trusted partner for electrical solutions, renewable energy systems, EV chargers, and domestic/commercial projects. MCS

• C Cwmni Egino Caernarfon · Modular & offsite construction · 1-9 employees

  Cwmni Egino was established by Welsh Government in 2021 to develop socio-economic growth opportunities from new nuclear development in North Wales. It

• D Darryl Roberts Electrical ltd Wrexham · Electrical · 10-49 employees

  DR Electrical offers comprehensive electrical services for residential and commercial clients, including installations, maintenance, solar PV, battery

• D Dave Cottle Civil Engineering Ltd Llay · Civil engineering · 50-249 employees

  Dave Cottle Civil Engineering work in the public and private sectors of the construction industry in North Wales and the North West.

• D David Grinter Associates Ltd Cwmbran · Marine & water engineering · 1-9 employees

  Providing technical consultancy, site surveys, coating condition reports and inspection solutions to the coatings Industry as a whole.

• D Dec-Elec Aberdare · Electrical · 10-49 employees

  Experienced electrical contractors in South Wales providing domestic, commercial, and maintenance services. Specialising in solar PV and EV charging s

• D Dec-Renewables Ltd Aberdare · Solar PV

  Specialists in solar, EV chargers, and heat pumps. Trusted renewable energy installers helping UK homes and businesses go green. Get a fixed quote tod

• D DINEFWR ELECTRICAL & SOLAR LTD Ammanford · Electrical · 1-9 employees

  Fully accredited electricians providing high-quality electrical work, solar PV, battery storage, and EV charging, delivered professionally, safely, an

• D Domelec Llay, Wrexham · Solar PV · 1-9 employees

  Trusted family-run solar installers in Wrexham, Chester & North Wales. Professional solar panel & battery storage installation. No hard sell.

• D Dragon Renewable Energy Ltd Corwen · Solar PV · 1-9 employees

  Expert advice & installation of renewable heating and energy solutions in North Wales, including ground/air source heat pumps and solar panels.

• E Eazy Heat Ammanford · Heating & ventilation · 1-9 employees

  EazyHeat is a trusted UK installer of home energy systems including boilers, heat pumps, solar, air conditioning and EV chargers. Rated Excellent on T

• E Eco Care Solutions Ltd Swansea · Solar PV · 1-9 employees

  Eco Care Solutions: Renewable energy specialists in South Wales. We design, supply and install solar PV, heat pumps, and battery storage. Get a free q

• E Efficient Living UK Swansea · Solar PV · 1-9 employees

  Efficient Living UK offers sustainable home solutions including solar panels, battery storage, EV charging, and LED lighting to combat rising energy c

• E Efs Systems (UK) Ltd Merthyr Tydfil · Electrical · 10-49 employees

  South Wales' trusted experts in electrical, fire, and security systems. Delivering safe, innovative, and energy-efficient solutions for businesses and

• E Egni Solar Cymru Carmarthen · Solar PV · 1-9 employees

  Egni Solar Cymru offers innovative domestic and commercial solar energy solutions with battery storage and expert installation across Wales, blending

• E Electech Electrics Lampeter · Solar PV · 1-9 employees

  Expert solar panel, battery storage, EV charger and air source heat pump installations across South West & Mid Wales. MCS certified, NICEIC registered