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Posted 05 August, 2026

Commercial Solar Design Specialist

PT Renewables 🌳
Cardiff, WLS, GB Full Time

Job Description

Commercial Solar Design Specialist | Hybrid Role (Design + Client Facing)

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We’re looking for a Commercial Solar Design Specialist who’s just as comfortable building accurate PV system designs as they are sitting in front of a client explaining ROI.

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This is a proper split role:

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  • ~50% detailed commercial solar design work
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  • ~50% client meetings, presentations & technical sales support
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If you like being stuck behind a screen all week, this won’t be for you. If you like seeing your designs turn into real projects and actually talking clients through them face to face — read on.

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What you’ll be doing

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Design side

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  • Produce full commercial solar PV designs (layouts, string design, shading, yield, electrical schematics)
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  • Carry out remote + on-site assessments to shape accurate system designs
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  • Select panels, inverters, mounting systems and full system components
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  • Ensure compliance with relevant standards, building regs and DNO/grid requirements
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  • Produce clear drawings, specs and handover docs for install teams
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  • Work closely with delivery/installation teams to make sure designs are actually buildable
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Client side

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  • Meet commercial clients face to face and present system designs clearly
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  • Break down technical detail into something non-technical stakeholders actually understand
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  • Talk confidently through performance, savings, ROI and payback
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  • Handle technical questions around maintenance, warranties, finance options
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  • Support sales teams in site visits, proposals and technical discussions
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Other bits

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  • Support materials lists and equipment ordering where needed
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  • Liaise with suppliers on spec, availability and lead times
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  • Keep up to speed with new tech, products and industry changes
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What we’re looking for

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Must have

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  • 2+ years’ experience in commercial solar PV design
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  • Strong understanding of PV systems, components and standards
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  • Confident communicator — comfortable presenting to clients face to face
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  • Able to explain ROI/payback and system performance clearly
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  • Experience with PV design tools (PVsyst / Helioscope / AutoCAD or similar)
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  • Full UK driving licence and willingness to travel to sites
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Nice to have

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  • Strong knowledge of grid connection / DNO processes
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  • Experience with battery storage / EV integration / wider energy systems
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  • Supplier or materials specification experience
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  • Exposure to commercial energy project delivery
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What you get

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  • Competitive salary (based on experience)
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  • Hybrid mix of office, design work and site/client visits
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  • Varied projects — no two weeks the same
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  • Real input into projects from concept through to delivery
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  • Opportunity to work on meaningful commercial solar builds
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If you want a role where your designs don’t just sit in a folder and you actually get in front of clients to see projects move forward — this one’s worth a look.