Renewables Design Specialist
Location: Cardiff
Salary: £35,000 to £40,000 (dependent on experience)
Contract Type: Full-time, Permanent
Reports to: Operations Manager
About the Role
UnifyHQ is proud to be working in partnership with our client, a leading energy efficiency provider delivering grant-funded retrofit solutions across South Wales. Their work spans solar PV, battery storage, air source heat pumps and insulation, with a strong focus on compliance, quality, and carbon reduction.
We are seeking a technically minded Renewables Design Specialist to lead the design, specification, and optimisation of low-carbon energy systems. This role supports domestic and commercial installations, ensuring all designs meet MCS standards, Building Regulations, and industry best practice.
Key Responsibilities
- Produce detailed technical designs, schematics, and layout drawings for solar PV, battery storage, ASHP, and ventilation systems (PIV, dMEV)
- Carry out load, yield, and performance calculations using specialist design software
- Specify components and materials to ensure efficiency, quality, and cost-effectiveness
- Prepare technical documentation for installation teams, subcontractors, and customers
- Ensure compliance with MCS standards, BS 7671 wiring regulations, and manufacturer requirements
- Conduct feasibility assessments and energy modelling based on site surveys, EPC data, and client needs
- Ensure all designs and documentation meet PAS 2030/2035, TrustMark, MCS, and planning standards
- Review and sign off commissioning documentation and as-built drawings
- Collaborate with Project Managers, Retrofit Coordinators, and Installers to maintain design intent
- Provide technical support and problem-solving during installation and commissioning
Candidate Profile
- Minimum 3 years’ experience in renewable energy system design
- Working knowledge of MCS, PAS 2035, and Building Regulations Part L
- Proficiency in relevant design software
- Strong understanding of electrical design principles and grid connection requirements (G98/G99)
- Excellent communication skills and attention to technical detail
- Ability to manage multiple projects and meet deadlines
- Experience within retrofit or social housing decarbonisation programmes
- Understanding of SAP, EPCs, and energy modelling methodologies
What’s on Offer
- Company pension
- Company vehicle for attending site visits
- Mobile phone
- Fast-paced and supportive team environment
- Opportunity to help shape commercial growth in the renewables sector
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