A solar PV designer takes the photos and measurements from a site survey and turns them into a system that can actually be permitted and built: module layout, string sizing, conductor and breaker sizing, equipment specifications and a plan set the local building department will approve. For installers who want to keep working in solar without spending every day on a roof, design and permitting is one of the most common next steps. This guide covers what the job involves, what qualifications employers look for, how NABCEP's design credential works, and a realistic plan for making the move.
What a solar PV designer does
The title covers a range of jobs, from drafting residential plan sets in a high-volume shop to engineering commercial systems. Most residential designers handle some combination of:
- Layout. Placing modules on each roof plane within fire setbacks and around obstructions, and checking shading.
- Electrical design. Sizing strings for the inverter, choosing conductors, conduit, overcurrent protection and disconnects, and deciding how and where the system connects to the home's service.
- Structural checks. Confirming the roof can take the load and that attachment spacing meets the racking manufacturer's requirements, or flagging the job for an engineer.
- Plan sets. Producing the site plan, single-line diagram, equipment data sheets, placards and labels the building department requires.
- Permitting and interconnection. Submitting the package, responding to plan-review comments and preparing utility interconnection paperwork.
- Revisions. Updating designs after a field change or failed inspection.
O*NET's Solar Energy Systems Engineers profile lists Photovoltaic System Designer and Solar Designer among its reported job titles, with tasks that include creating single-line electrical diagrams, developing design specifications and giving technical direction to installation crews.
Do you need an engineering degree?
For residential design and permitting roles, often not. For stamped structural or electrical engineering, yes, and that usually means a professional engineer license.
O*NET places solar systems engineers in Job Zone Four, with 56 percent of surveyed respondents saying a new hire needs a bachelor's degree. That describes engineering roles. Many residential design and permit-coordinator postings instead ask for solar or electrical experience, design software skills and code knowledge. The O*NET wage figure for that profile, $122,930 a year in 2025, belongs to the broad "Engineers, All Other" group and should not be read as typical pay for a residential designer.
Read each posting carefully. "Solar designer" at one company means drafting plan sets from survey data; at another it means an engineer who signs off on commercial systems.
The solar PV designer path from installing: your advantage
Plenty of designers have never mounted a module. Installers who move into design bring things that are hard to teach from a desk:
- You know when a layout is technically valid but miserable to install: too tight to an edge, a string that forces a long conductor run, a conduit path through a finished living space.
- You can read survey photos and spot what the surveyor missed.
- You understand what inspectors actually check, because you have stood next to them.
- Crews trust a designer who has been on the roof, which makes field changes faster.
If you are not yet a lead, our guide to becoming a trusted lead covers the field skills that also make a strong designer. The site surveyor role is another common bridge between the crew and the design desk.
Skills and knowledge to build
| Area | What to learn | How installers can start |
|---|---|---|
| Electrical code | The NEC sections on PV systems, interconnection and grounding, plus your state's adopted edition | Take an NEC-focused course; read the code sections behind every label you have installed |
| String and conductor sizing | Temperature-corrected voltage, ampacity and voltage drop | Recalculate a few of your company's past designs by hand |
| Design software | The layout and plan-set tools your target employer uses, plus CAD basics | Ask for a seat or trial license; many tools offer training |
| Structural basics | Rafter spans, attachment spacing, racking manufacturer tables | Pay attention to attachment layouts you install and why they changed |
| Local permitting | What your local building departments and utility require and commonly reject | Collect every correction notice your company receives and learn the fix |
| Storage design | Battery placement, backup panels and code requirements | Get on battery installs; see our home battery installation guide |
What the day-to-day looks like
Expect a queue. In a residential design role you usually work through a list of jobs at different stages: new designs from fresh surveys, revisions after a customer changes the system size, corrections from a plan reviewer, and field changes called in by a crew. Speed matters, but accuracy matters more, because every error you send out comes back as a delay with your name on it.
Most of the job is at a desk, though many designers still go out for site verifications or to troubleshoot a problem the crew cannot resolve. You will spend more time on email and the phone than you did as an installer, coordinating with sales, operations, building departments and the utility.
The pressure is different from the roof. Instead of heat and production pace, it comes from deadlines, permit backlogs and design changes that arrive late in the process. Installers who like puzzles, checklists and getting details exactly right tend to enjoy it. Installers who need physical work to stay sharp often miss the field and look for hybrid roles such as survey, inspection or field engineering instead.
The NABCEP PV Design Specialist certification
NABCEP's PV Design Specialist (PVDS) is aimed at experienced designers who configure the mechanical and electrical parts of PV systems. According to the 2025 NABCEP Certification Handbook, eligibility requires:
- age 18 or older;
- OSHA 10 Construction (or a government equivalent);
- 24 hours of advanced training: 18 hours of PV design from an accredited provider plus 6 hours on the National Electrical Code;
- designs totaling at least 12 project credits, where systems from 1 kW to 999 kW earn 2 credits and systems of 1 MW or more earn 3;
- each design showing your name or initials as the designer or drafter, at least 1 kW DC, and completed within the two calendar years before you apply;
- passing the written exam.
For a residential designer, 12 credits means six residential designs that carry your name. Designs that were never installed need either the authority's approval or a letter explaining why the job did not proceed. That "designed by" requirement is why you should ask for your initials on the title block as soon as you start doing real design work.
Already have PVIP? The PV Installation Professional covers design among its topics but is built around installation. PVDS is the dedicated design credential. Our NABCEP explainer compares the two tracks.
Permitting is changing, and designers should know it
Some jurisdictions now accept automated permit platforms for standard residential systems. NREL developed SolarAPP with code officials and the solar industry as a free, web-based tool that checks code-compliant residential PV systems and issues permits automatically. Where it is used, it changes the designer's job from writing narratives for plan reviewers to entering clean, accurate system data.
That shift rewards designers who get details right the first time. It is also a reason not to build a career on drafting alone: the long-term value is in code knowledge, judgment and problem-solving, not in producing drawings.
A 12-month plan to move from installer to designer
- Months 1 to 2. Tell your manager you want to move toward design. Ask to see the plan set for every job you install, and compare it to what you find on the roof.
- Months 2 to 4. Take an NEC course focused on PV. Start a notebook of every field change and why it happened.
- Months 3 to 6. Get access to the company's design software. Redraw a few completed jobs on your own and compare your work to the official design.
- Months 4 to 8. Do site surveys if your company allows it. Shadow the design team on revisions and permit corrections.
- Months 6 to 10. Complete accredited PV design training toward the 18 hours PVDS requires. Start drafting real designs under review, with your initials on them.
- Months 10 to 12. Apply for an internal design or permit-coordinator opening, or apply outside with a portfolio of redacted plan sets you produced.
Expect to keep some field contact. Many designers still do site visits, field verifications or troubleshooting, and that makes them better at the desk work.
Bottom line on becoming a solar PV designer
If you are an installer who likes the electrical and code side of the job more than the lifting, solar PV design is a realistic next step, and many residential roles do not require an engineering degree. Your field experience is your biggest advantage. Learn the NEC sections that govern PV, get fluent in your company's design tools, get your name on real designs, and work toward NABCEP PVDS. Within about a year, a motivated installer can be ready to compete for an entry-level design or permitting job.