Commercial Solar Design Specialist

Company: PT Renewables
Apply for the Commercial Solar Design Specialist
Location: Cardiff
Job Description:

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

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.

This is a proper split role:

  • ~50% detailed commercial solar design work
  • ~50% client meetings, presentations & technical sales support

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.

What you’ll be doing

Design side

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

Client side

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

Other bits

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

What we’re looking for

Must have

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

Nice to have

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

What you get

  • Competitive salary (based on experience)
  • Hybrid mix of office, design work and site/client visits
  • Varied projects — no two weeks the same
  • Real input into projects from concept through to delivery
  • Opportunity to work on meaningful commercial solar builds

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.

Posted: July 1st, 2026