Solar Engineer Job Description

A solar engineer is the person who decides how sunlight on a particular roof, carport or field becomes metered electricity on a particular utility's wires. O*NET includes "Solar Engineer," "Solar Design Engineer" and "PV System Designer" in its sample of reported job titles for Solar Energy Systems Engineers, and the core tasks it records read like a project file: conduct engineering site audits, design or coordinate the design of PV systems, create single-line diagrams and panel schedules in CAD software, and provide technical support to installation crews through startup, testing and commissioning.

The design desk

A typical project starts with data. The engineer pulls a site survey, utility bills or interval load data, an aerial or drone model of the site and the local utility's interconnection requirements. From there the work moves into a layout tool such as PVsyst or HelioScope, where array tilt, azimuth, row spacing and inverter loading ratio get traded against annual energy and cost. A residential designer might finish a layout in an afternoon; a ground-mount plant can take months of iteration with civil, geotechnical and environmental inputs.

Electrical design follows. String lengths have to stay inside inverter voltage windows on the coldest morning of the year, conductors have to carry current with the right derating, and the whole system has to meet the National Electrical Code article on photovoltaic systems plus whatever amendments the local authority has adopted. The output is a permit set: site plan, single-line diagram, equipment cut sheets, labeling and, where required, a structural letter.

Between the developer and the utility

On commercial and utility-scale work the engineer also sits between the project developer and the utility. Interconnection applications need fault-current data, protection settings and inverter specifications. When the utility or regional grid operator runs its system impact study, the solar engineer answers questions, revises the design if the study calls for upgrades and checks that the final interconnection agreement matches what gets built.

In the field and after energization

During construction the engineer reviews submittals, answers requests for information and signs off on changes when the crew finds an obstruction the drawings missed. After energization the job turns to performance: comparing monitored output with the production model and tracing shortfalls to string failures, inverter faults, soiling or clipping.

Where the work happens

Employers include project developers, EPC contractors, engineering consulting firms, residential and commercial installers, utilities and equipment manufacturers. O*NET lists AutoCAD and Revit among the computer-aided design software used in this occupation. Engineers on the manufacturing side test cells and modules rather than designing installations, and engineers at utilities spend more of their time on the grid side of the meter. The title is the same; the daily mix of modeling, drafting, field visits and paperwork shifts with the employer.

Education

O*NET puts Solar Energy Systems Engineers in Job Zone Four and says most occupations in that zone require a four-year bachelor's degree, but some do not. As a rough guide, a bachelor's in electrical engineering is a natural route because so much of the job is power-system design. Mechanical, civil and energy-systems engineering graduates also enter the field and may start on structural, thermal or performance-modeling work before moving into full system design. Useful coursework includes power electronics, power systems analysis, renewable energy systems and engineering economics.

Licensure

Engineering licensure is handled state by state. The usual path is to pass the Fundamentals of Engineering (FE) exam, administered by the National Council of Examiners for Engineering and Surveying (NCEES), complete the supervised experience the state board sets, then pass the PE exam. The PE Electrical and Computer: Power exam from NCEES is the version that fits PV system design. Sealing drawings for a permit requires a Professional Engineer license in the state where they are filed, so an engineer who wants to be the engineer of record on commercial or utility systems should plan for the PE early.

Industry certifications

The North American Board of Certified Energy Practitioners (NABCEP) awards the board certifications a solar engineer is most likely to pursue:

• PV Design Specialist (PVDS): NABCEP lists 12 project credits with a decision-making role in system design, OSHA 10 and 24 hours of training as the requirements.
• PV Installation Professional (PVIP): six project credits with a decision-making role, OSHA 10 and 58 hours of training.
• Energy Storage Installation Professional (ESIP): worth adding for engineers whose projects include battery storage; NABCEP lists OSHA 30 rather than OSHA 10 for this one.

The OSHA 10-hour construction card, issued through the Occupational Safety and Health Administration's Outreach Training Program, is listed as a requirement for both PVDS and PVIP and is a sensible first credential for anyone who will walk job sites.

Experience

As a rough guide, entry-level designers may begin with residential layouts and permit packages, move to commercial systems after two or three years, and take on utility-scale or interconnection-heavy work later. Experience worth building includes time in the field as an installer or commissioning technician, familiarity with interconnection studies, and hands-on work with PVsyst, HelioScope, AutoCAD and a scripting language such as Python for batch modeling. Engineers who can read a utility's technical requirements and spot a protection or metering issue before the application goes in can spare a project rounds of revisions.

Skills

Beyond electrical design, the job rewards careful document control, clear writing for permit reviewers and utility engineers, and comfort with sourcing paperwork now that tax-credit eligibility can hinge on who made the equipment.

Projected openings

O*NET projects average growth of 3% to 4% for Engineers, All Other between 2025 and 2035, with about 8,800 openings a year on average across that catch-all group. BLS does not project solar engineers separately, so the figure covers many engineering specialties beyond solar.

Installation volume in 2026

The best near-term signal is construction activity. The US Solar Market Insight Q3 2026 report from the Solar Energy Industries Association (SEIA), an industry trade group, and Wood Mackenzie, published Sept. 10, 2026, found that the US installed 11.4 gigawatts direct current (GWdc) of solar capacity in Q2 2026, a 45% increase from Q2 2025. The same report said the distributed segments continued to soften as the market adjusted to the expiration of the Section 25D residential credit at the end of 2025.

Tax credits and the deadline that shapes pipelines

Under IRS Notice 2025-42, solar and wind facilities that begin construction after July 4, 2026 lose the 45Y and 48E clean electricity credits unless they are placed in service by Dec. 31, 2027. For a project in that position, design, procurement and construction all have to fit inside that window.

Foreign-sourcing rules

The One, Big, Beautiful Bill added restrictions that can disqualify a project from the 45Y and 48E credits if it receives material assistance from a prohibited foreign entity. On Feb. 12, 2026, Treasury and the IRS issued Notice 2026-15, which explains interim safe harbors and how to calculate the material assistance cost ratio, and said the agencies intend to propose regulations on the definition of a prohibited foreign entity and the ratio calculation. The equipment an engineer specifies feeds into that calculation.

Trade cases on cells and modules

On Oct. 14, 2026, the US International Trade Commission determined that a US industry is materially injured by imports of crystalline silicon photovoltaic cells, whether or not assembled into modules, from India, Indonesia and Laos, which the Commerce Department has determined are sold in the United States at less than fair value. As a result, the USITC said, Commerce would issue antidumping and countervailing duty orders on those imports. When a module supply changes, the engineer is the one who checks a substitute against the electrical and structural design.

AI and automation

Automation has reached the grid-study side of the work. In October 2026 the American Public Power Association reported that Duke Energy engineers are working with AI agents to automate key components of the interconnection study process, while engineers direct the study and make final engineering decisions. In a July 2026 report on an industry panel, pv magazine USA quoted the technical director for engineering at Southwest Power Pool saying that full automation of interconnection studies is "probably farther away than more immediate." In the Duke Energy account, the agents streamline data preparation and analysis execution while engineers keep the judgment calls.

Dear Hiring Manager,

I am applying for the Solar Engineer position on your utility-scale engineering team. For the past four years I have worked as a design engineer at a regional EPC contractor, where I moved from residential permit packages to commercial carports and, over the last 18 months, to ground-mount projects in the 20 to 80 MW range.

On my most recent project, a 60 MWac single-axis tracker site, I owned the DC design from first layout through issued-for-construction drawings. I ran the energy model in PVsyst, sized strings against the site's record low temperature, and worked with our civil engineer to rework the array blocks when the geotechnical report moved two drainage corridors. When the utility's system impact study asked for revised short-circuit data, I turned around the updated inverter settings and single-line diagram within a week, which kept the facilities study on its original schedule.

I also built a small Python tool that pulls equipment data from our approved vendor list into the bill of materials and flags any component missing country-of-origin documentation. Our procurement team now runs it on every project before purchase orders go out, and it has caught several gaps that would otherwise have surfaced during tax-credit review.

I passed the FE exam in electrical and computer engineering, I am finishing my supervised experience toward the PE, and I hold the NABCEP PV Design Specialist credential. What draws me to your team is the mix of interconnection-heavy projects in your pipeline; I want to spend the next stage of my career closer to the grid side of these plants.

I would welcome the chance to talk about your upcoming projects and how I could contribute to them.

Sincerely, Jordan Avery