Solar Design Engineer Job Description: Template

Last updated: November 2026

Solar design engineers turn site information into coordinated photovoltaic (PV) designs. The role combines electrical reasoning, energy modeling and documentation, but the exact scope depends on the employer, market segment and local licensing rules. A useful job description makes those boundaries clear.

Whether you are a hiring manager writing a role brief or a designer planning your next move, this guide provides a copy-ready template, a skills matrix, compensation context and interview prompts. The template is an example to adapt, not evidence that every employer uses the same requirements.

SurgePV publishes this post and sells solar design software.

What a Solar Design Engineer Does

A solar design engineer converts site data, roof measurements, shading surveys, utility bills, and customer load profiles, into project-specific system designs. The output is not just a panel layout. It is a complete technical package: single-line diagrams, string configuration drawings, energy yield reports, permitting documentation, and, where the role includes sales support, a customer-facing proposal.

The day-to-day work falls into four recurring tasks.

Site assessment and data ingestion. The engineer reviews aerial imagery, drone survey data, or site visit notes to confirm usable roof area, pitch, azimuth, and obstruction positions. They import this data into a design platform and verify that the available square footage and orientation can support the proposed system size. Incomplete site data at this stage causes rework at every downstream step.

System layout and stringing. Panel placement optimizes for yield while meeting setback requirements, fire code clearances, and structural limits. String configuration balances the electrical design, module count per string, number of strings per MPPT, inverter sizing, against voltage and current limits specified in the inverter datasheet and NEC 690. The job description should state who prepares the calculations, who reviews them and who has authority to approve the submission.

Simulation and loss modeling. Every finalized design runs through energy simulation. The engineer sets weather data sources, applies soiling and degradation rates, and documents shading losses from nearby obstructions. The production estimate feeds the financial model. Any probabilistic yield label or production guarantee needs its own assumptions, uncertainty analysis and contractual review. How the engineer sets simulation inputs determines whether the production estimate is defensible or optimistic.

Documentation and permitting. The final deliverable is a permit-ready drawing set: plan view layout, electrical single-line diagram, equipment specifications, interconnection notes, and AHJ-specific forms. At larger firms, a permit coordinator handles submission. At smaller installers, the design engineer submits directly and resolves comments from plan checkers.

Across these tasks, software can connect layout, simulation and proposal work. The designer still needs to check the inputs and reconcile outputs when the project changes. Evaluate the tool against the team’s actual deliverables rather than assuming an integrated platform removes review work.

How the Role Differs From Adjacent Positions

The distinction matters most where work requires licensed engineering practice. As NCEES explains, candidates must check the requirements of the state or territory where they intend to practise. An employer’s title is not a substitute for that authorization. State who will perform any required licensed review and how designers escalate work outside their competence.

Solar Design Engineer Job Description Template

The illustrative template below targets a mid-level role at a residential or light-commercial solar installer. Adjust experience and certification requirements up for senior roles or utility-scale EPCs, and down for junior or associate positions.

Position: Solar Design Engineer Department: Engineering / Design Reports to: Engineering Manager or Director of Design Location: [City, State] / Remote-eligible

About the Role

We are looking for a Solar Design Engineer to join our design team. You will produce accurate, permit-ready solar PV system designs for residential and commercial customers across [region/market]. You will work directly with our sales and project management teams to move designs from initial site data through final AHJ submission.

What You Will Do

• Design grid-tied and hybrid solar PV systems within [the company’s documented project-size range]
• Produce electrical single-line diagrams, panel layout drawings, and permit packages using [design platform]
• Run energy simulations with documented weather and loss assumptions; prepare uncertainty analysis where the project requires it
• Perform string sizing, inverter selection, and BOS specification in compliance with NEC 690 and local AHJ requirements
• Review site assessment reports, aerial imagery, and drone survey data to validate design assumptions
• Coordinate with the permitting team to resolve AHJ comments on submitted packages
• Maintain and update component libraries (modules, inverters, racking) in the design software
• Collaborate with the proposal team to ensure design output feeds accurately into customer proposals
• Identify and escalate structural, electrical, or interconnection issues before permit submission

What We Are Looking For

• Bachelor’s degree in Electrical Engineering, Mechanical Engineering, or related field (or equivalent practical experience)
• [Required experience or equivalent demonstrable competency] in solar PV design
• Proficiency in at least one of: PVsyst, Helioscope, Aurora Solar, or SurgePV
• Working knowledge of NEC 690 and applicable local codes
• NABCEP PV Design Specialist (PVDS) certification preferred
• Strong attention to detail, errors in string sizing or setback calculations have downstream consequences
• Ability to manage [the agreed queue size] with documented priorities and review gates
• Experience with AutoCAD, Bluebeam, or equivalent drawing tools is a plus

Compensation

• Base salary: [published local range, currency and pay period]
• Benefits: [company standard package]
• Remote work: [policy]

For junior roles, specify the training and supervision provided. Avoid requesting several years of independent design responsibility while describing the role as entry level. State which tasks can be learned after hiring and which qualifications must already be held.

For senior and lead roles, describe the expected review authority, mentoring and project complexity. Require a PE license only where the actual responsibilities or jurisdiction call for it. Ask for evidence of relevant work rather than an arbitrary minimum number of completed projects.

Core Technical Skills: What Each Level Requires

The skills a solar design engineer needs scale significantly from entry to senior. The following suggested matrix maps competencies to responsibility. The experience bands are illustrative hiring labels, not measured promotion timelines.

Technical Skills That Separate Good From Great

DC Electrical Theory. String voltage, maximum power point tracking, temperature coefficients, and open-circuit voltage under cold conditions are design fundamentals. Ask candidates to explain the cold-voltage calculation, its temperature basis and the equipment limits. Review how they handle incomplete data rather than treating a memorized formula as sufficient.

Shade Analysis. Shade is not binary. A chimney and a rooftop mechanical unit can cast different time-dependent shadows across an array. Senior engineers understand time-of-day shading profiles, diode bypass behavior, and when micro-inverters or power optimizers change the ROI calculation. The solar shadow analysis software a team uses directly affects the accuracy of this work.

Code Compliance. Ask candidates to identify the adopted electrical code and the authority having jurisdiction (AHJ). They should know how to find the applicable requirements and document the design response. A standard used on a previous job may not be the edition adopted for this project.

Energy Simulation. A simulation is only as good as its inputs. Weather data source selection (TMY vs. satellite-derived vs. ground station), soiling factor calibration for local conditions, and module degradation modeling all require judgment. An engineer who runs default settings in PVsyst without validating them against local production data can produce estimates with poorly justified assumptions.

Documentation. AHJs reject incomplete packages. A good engineer treats documentation as part of the design, not an afterthought. This means clear equipment schedules, labeled conduit runs, accurate site photos, and properly formatted SLDs that a plan checker can follow without calling for clarification.

Soft Skills Employers Test For

“Soft skills” sounds like a vague category, but hiring managers screen for specific behaviors:

Communication under technical disagreement. Can the engineer explain why a design decision is correct to a sales rep who does not understand NEC 690? Can they push back on an AHJ comment with a code citation rather than just complying to avoid friction?

Queue management. A residential designer may need to manage several projects at different review stages. The ability to triage, prioritize, and communicate realistic turnaround times without supervision is operational.

Self-directed QA. The best engineers catch their own errors before submission. This requires building personal checklists, not relying on a reviewer to function as a safety net.

Software Tools Solar Design Engineers Use Daily

Match software requirements to the outputs the job owns. A candidate should understand the assumptions and review steps behind a model, not only recognize the platform interface.

Design and Simulation Platforms

For a documented modeling example, SAM’s photovoltaic documentation distinguishes detailed module-and-inverter modeling from preliminary PVWatts analysis. Use this distinction in an interview: ask which inputs are known, which are assumed and why the chosen model fits the design stage.

SurgePV’s published scope includes 3D roof modeling, array layout, shading analysis, energy-yield and financial modeling, electrical workflow support, BOM output and proposal generation. In a software assessment, ask candidates how they would verify those outputs and identify missing site information. Do not infer permit automation or a guaranteed time saving from the feature list.

Why Platform Knowledge Matters at Interview

Ask the candidate to walk through a model they are permitted to share. Have them identify the weather data, module and inverter selection, orientation and treatment of losses. Then change one assumption and ask which results should be revisited.

A useful answer connects a model input to a physical or contractual reason. For example, a shading assumption may come from a survey, while a financial assumption may come from the customer’s tariff. The candidate should distinguish an entered value from a validated value and recognize which questions require another specialist.

Supporting Tools

Drawing tools help prepare electrical details and coordinated plans. PDF review tools help track comments and assemble submission packages. Spreadsheets can support custom calculations, but formulas need units, source references and independent checking.

Project-management systems track owners, deadlines and revision status. They should make it clear which designs are awaiting site data, technical review or an external response. A candidate does not need experience with every brand to demonstrate this discipline.

Certifications: What Is Required vs. What Helps

Separate voluntary certification, employer requirements and legal authorization. They serve different purposes, and the job description should say which applies.

NABCEP PV Design Specialist (PVDS)

NABCEP’s 2025 Certification Handbook describes its credentials as voluntary and states that they are not government professional licenses. PVDS is relevant to design work, but an employer must decide whether it is required or preferred for this particular position.

Use the handbook’s PVDS section to check eligibility, training categories, experience evidence, examination and renewal requirements. Do not assume that completing a course alone makes an applicant eligible or that a certification automatically authorizes independent practice.

Before paying for training, make a record of the intended credential, the applicant’s existing experience and the course’s approved category. Ask the provider and NABCEP to resolve any uncertainty about eligibility. This is more useful than relying on an old exam-price or training-hours summary in a job advert.

NABCEP PV Installation Professional (PVIP)

An installation-focused credential may be relevant when the design role includes construction coordination or commissioning support. State those responsibilities explicitly. Do not require multiple certifications by default when the position primarily prepares layouts under supervision.

A candidate coming from installation can bring useful knowledge of access, routing and field constraints. Assess how they translate that knowledge into documented calculations and drawings, and identify any training needed for the office-based responsibilities.

Professional Engineer (PE) License

Licensing requirements depend on the jurisdiction and scope of practice. NCEES describes education, experience and examinations as the common route while directing candidates to the relevant licensing board. A license in one state should not be treated as automatic permission to seal work in another.

For a role that includes signing or sealing drawings, specify the required jurisdiction, discipline and responsibility. Identify how the employer handles work outside the license holder’s competence or registration. Certification and experience remain useful, but neither replaces the necessary license.

IEC Documentation Familiarity

The IEC description of IEC 62446-1:2016+A1:2018 covers handover documentation, commissioning tests and inspection for grid-connected PV systems. It should not be described as an international equivalent of every NEC requirement.

Ask candidates which documentation standard applies to the market being served and how they record inspection or commissioning results. For a design-only role, clarify who will collect the field records and who will review the completed handover package.

Solar Energy International (SEI) Courses

SEI’s NABCEP guidance directs students to the certification and associate handbooks when selecting training. Use the provider’s own course information to match training to a candidate’s needs; avoid assuming every course satisfies every credential’s requirements.

A training certificate shows completion of a course. It does not, by itself, demonstrate independent design competence. Pair training with supervised work, feedback and a portfolio of permitted examples that show how the candidate handled uncertainty and review comments.

Career Path and Promotion Criteria

A useful career ladder makes responsibility and review authority explicit. What changes at each level is not just experience, it is scope of responsibility, complexity of projects handled, and the degree of independent vs. supervised work.

Illustrative Career Ladder Overview

These experience bands are examples for role planning, not a promise of promotion or a measured industry average.

What Gets Engineers Promoted

Junior to Mid. Sustained design accuracy (low rework rate), NABCEP PVDS certification completed or in progress, and the ability to manage a queue without daily check-ins. The milestone is being trusted to manage the agreed scope, while retaining required engineering and external reviews.

Mid to Senior. Demonstrated performance on commercial or complex projects, ground mounts, battery storage, large commercial rooftops. Capacity to QA junior engineers’ work. Technical communication with clients or AHJs without supervision.

Senior to Lead. The transition from individual contributor to team multiplier. A senior engineer who identifies process gaps and fixes them, rather than just surfacing them, is a lead candidate. Hiring managers watch for engineers who improve the team’s output rate, not just their own.

Lead to Principal or Manager. Two diverging paths. The principal track keeps the engineer in technical depth: evaluating new platforms, setting design standards, representing the company in technical forums. The management track moves toward team performance and organizational scale. Engineers who want the management track should start managing a junior designer on a project basis before formally requesting the role.

Salary Benchmarks by Level and Company Type

Use a documented local range for an actual job offer. The BLS data below provide U.S. occupational context, not solar-design salaries by seniority, certification or employer type.

US Salary Context

The BLS Occupational Outlook Handbook reports these median annual wages for electrical engineers in May 2025, as displayed when checked in November 2026:

Do not present these medians as entry-level offers or as a solar salary survey. A median describes the middle of a wage distribution; it does not specify what a candidate with a particular license or project portfolio should earn.

What to Compare in an Offer

Separate base pay from bonuses, overtime treatment, retirement contributions and insurance. Record the currency, pay period and location. If a role is remote, ask whether the employer adjusts pay by residence and how travel is reimbursed.

Match responsibility as well as title. A position that includes engineering review, client meetings and supervision may differ substantially from a layout-production role with the same title. Ask how workload and sign-off responsibilities are reflected in the offer.

If a company claims a premium for a PE license or utility experience, request the actual compensation policy or offered range. This guide does not assign a universal percentage premium to either qualification.

European Salary Comparisons

Compare offers within the country and market where the work will be performed. Do not convert a U.S. median into a European estimate using a blanket percentage discount. Local currency, working hours, paid leave, pension treatment and employment terms affect the comparison.

For a cross-border role, establish the employing entity and the jurisdiction governing professional practice. A remote working arrangement does not settle tax, employment or engineering-registration questions. Ask the employer for the relevant written terms before comparing net compensation.

Residential vs. Commercial vs. Utility-Scale Roles

The title “solar design engineer” covers three functionally different jobs depending on the market segment. Understanding these differences matters for hiring managers writing JDs and candidates evaluating offers.

Residential Solar Design Engineer

Key skills: High throughput, standardized design processes, AHJ familiarity, proposal integration

Residential design often involves repeated workflows across differing roofs and local requirements. Define how the team measures completeness, review quality and turnaround. An approval rate is useful only when the sample period, submission count and reasons for corrections are recorded.

Proposal handoff matters because customer-facing scope should match the reviewed layout and production assumptions. Ask who reconciles those records after a module, inverter or site change. Do not make the designer accountable for sales conversion without defining which factors they control.

A clear intake checklist helps the role: roof data, equipment location, electrical service information, customer requirements and unresolved survey questions. The engineer should know when to proceed with a preliminary design and when missing information holds a release.

Commercial Solar Design Engineer

Key skills: Complex rooftop and ground-mount layout, battery storage design, utility interconnection, stamped drawing coordination

Commercial projects can involve structural specialists, utility contacts and multiple review stages. State whether the engineer is expected to lead those discussions or prepare material for another reviewer.

Commercial production and financial models need documented assumptions appropriate to the customer’s use. A contractual production guarantee or lender review is a separate responsibility; state who owns it.

Utility-Scale Solar Design Engineer

Key skills: DC collection system design, MV cable sizing, substation and interconnection coordination, SCADA integration, bankable PVsyst simulation models

Utility-scale work needs coordination across design disciplines and project stages. Clarify the interfaces with civil, structural, electrical, protection and controls teams. Version control and review gates help catch conflicting assumptions before procurement or construction; permit review is not the only opportunity to find them.

For career-entry planning, use the solar designer pathway guide.

Key Differences Across Role Types

The following is a suggested division of responsibilities. Actual employers may combine or separate these tasks.

What Hiring Managers Actually Screen For

The job description is a filter, not a blueprint. What hiring managers actually evaluate differs from what the JD lists.

The Portfolio Review

A useful hiring process asks candidates to share recent design work before the technical interview.

Project count needs context. Describe the project type, your actual responsibility, the review process and the decisions you made. A large count of repeated layouts is different evidence from a smaller portfolio of complex coordinated projects.

Error rate. If you have metrics from your current or previous employer on permit approval rates or rework frequency, share them. Give the sample size, period and definition of rework alongside any approval percentage.

Complexity range. Designs that span from standard single-story residential to a complex commercial rooftop with HVAC obstructions demonstrate that the engineer does not just run templates.

The Technical Screen

A technical screen can include a practical design exercise. Useful formats:

• String sizing a given inverter and module combination under specified conditions
• Identifying errors in a provided SLD
• Calculating expected production for a hypothetical site
• Explaining why a specific shade analysis result might differ from field performance

Score the reasoning, assumptions and review decisions as well as the numerical answer. Use the same criteria for all candidates.

Red Flags Hiring Managers Note

Inability to explain simulation assumptions. “I just ran it through the software” with no ability to describe the weather dataset, loss model inputs, or uncertainty range is a clear flag. Software executes engineering judgment. It does not replace it.

Inconsistent code knowledge. An engineer who claims NEC 690 proficiency but cannot answer a basic rapid shutdown question, or who does not know the current code version, needs recalibration.

No demonstrated volume at relevant scale. A candidate for a mid-level residential role who has only done commercial design (or vice versa) requires retraining. Volume and project type both matter.

Passive approach to quality. Engineers who say “my reviewer catches those things” rather than describing their own QA process are telling the hiring manager how much supervision they will require.

For a broader look at what to look for when hiring solar installers and building out a technical team, that guide covers the operational side of the hiring process.

Interview Questions Solar Design Engineers Face

Knowing what to expect reduces anxiety and lets engineering judgment come through. Use these example questions to assess the responsibilities described in the job advert.

Technical Questions

“Walk me through how you would string-size a 100 kW commercial project.”

Interviewers listen for a systematic process: starting from module Voc-cold and Vmp-hot, working toward inverter voltage and current limits, then checking MPPT window coverage. Candidates who jump to software before establishing the electrical constraints are flagging a process gap.

“How do you handle shading on a design where partial shading is unavoidable?”

Interviewers listen for awareness of bypass diode behavior, string-level vs. module-level power electronics trade-offs, and the conditions under which microinverters or optimizers change the ROI calculation. There is no single right answer, but a reasoned answer is mandatory.

“What information do you need from a site survey before you can start a design?”

A complete answer includes: roof dimensions and usable area, pitch and azimuth by plane, obstruction locations and heights, utility meter and main panel location, attic access for conduit routing, and local AHJ-specific requirements. Engineers who omit interconnection requirements or structural details are flagging incomplete process awareness.

“Describe a design that had to be significantly revised after initial submission. What happened?”

Interviewers listen for ownership of the error, clear diagnosis of what went wrong, and evidence that the engineer changed their process to prevent recurrence. Candidates who deflect blame are not strong answers.

“What weather dataset do you typically use in your simulations, and why?”

Awareness that weather dataset selection matters, TMY3, Meteonorm, Solargis, and NSRDB all have different coverage, resolution, and methodology, is what interviewers want to hear. An engineer who defaults to “whatever the platform suggests” without knowing why may be producing simulations that systematically misestimate yield for their specific geography.

“How would you explain a 12% variance between your simulated yield and actual first-year production?”

Diagnostic thinking is what this tests. A complete answer covers: soiling (was the factor realistic?), first-year degradation modeling, weather deviation from TMY, curtailment or clipping events, and inverter availability. Engineers who blame the software rather than examining their assumptions are not debugging the problem.

Behavioral Questions

“Tell me about the most complex design challenge you have solved.”

Strong answers are specific: a 400 kW commercial rooftop with three roof planes at different pitches, a challenging shade analysis involving a rooftop mechanical screen, or a residential battery retrofit that required load-profile analysis to size correctly.

“How do you manage a queue of 15 active designs with competing deadlines?”

Strong answers include a clear intake and priority system, communication protocols with the sales or project team on expected turnaround, and a QA step before submission that does not depend on a supervisor review.

“Describe a time you disagreed with a colleague or manager about a design decision.”

Strong answers demonstrate that the engineer can advocate for their technical position with data, and also recognize when to defer to more experienced judgment.

“What has been your biggest professional development focus in the past 12 months?”

Hiring managers are looking for engineers who direct their own learning. Specific answers, “I completed relevant simulation training and documented how I applied it to our commercial modeling assumptions”, are far stronger than “I’ve been trying to improve my skills.”

“Where do you see the biggest inefficiency in your current design workflow?”

This surfaces operational awareness. An engineer who can name a specific process bottleneck, and has thought about how to fix it, demonstrates the kind of judgment that accelerates a team, not just their own output.

Conclusion

Hiring managers should define the market segment, deliverables and review authority before selecting software or credential requirements. Publish a local compensation range and make training, travel and supervision explicit.

Candidates should prepare permitted examples that explain assumptions, calculations and revisions. Show how you recognize the boundary of your competence and bring unresolved questions to the appropriate reviewer.

To evaluate the software part of the role, explore SurgePV’s design workspace with a representative project and use the same review checklist you would expect a new engineer to follow.

Frequently Asked Questions

What qualifications does a solar design engineer need?

Qualifications depend on the role and jurisdiction. BLS describes a bachelor’s degree as typical for electrical-engineering occupations, while an employer may define different requirements for supervised design tasks. Check any licensing requirement separately from preferred experience or certification.

What software do solar design engineers use?

Solar design engineers use tools for layout, energy modeling, electrical documentation and project review. SurgePV’s published scope includes layout, shading analysis, energy-yield modeling and proposal generation. The employer should specify its required outputs and assess whether candidates can explain and check them.

What is the salary of a solar design engineer?

There is no single verified solar-design salary range in the sources used here. BLS reports a May 2025 U.S. median of $120,630 for electrical engineers broadly, not specifically solar designers. Compare actual local offers by scope, benefits and responsibility.

Is NABCEP certification required for solar design jobs?

NABCEP certification is voluntary, although an employer may require it for a particular position. Its credentials are not government professional licenses. Check the employer’s requirements and the NABCEP handbook separately from local licensing rules.

Can a solar design engineer stamp drawings?

A job title alone does not authorize an engineer to seal drawings. The person must meet the relevant licensing and practice requirements for that jurisdiction and scope. Specify the responsible licensed reviewer in the project workflow.

How long does it take to become a senior solar design engineer?

There is no universal promotion timeline. Seniority should reflect independent judgment, complexity handled, review competence and mentoring within the employer’s role framework. Keep licensing requirements separate from the internal title.