- How the PVIS Blueprint Is Built
- All 13 Domains and Their Published Weights
- Safety Domains: Plan and Hazards
- Wiring Domains: Raceways, Conductors, and Equipment
- Grounding and Bonding
- Interconnection, Monitoring, and Batteries
- Structures and Modules
- Sequencing the Domains in Your Prep
- Exam Format, Fees, and the NEC Reference
- Frequently Asked Questions
- The PV Installer Specialist exam has 13 weighted domains; Safeguard against hazards and Install grounding & bonding are tied at 10% each.
- Published domain weights total 98%, not 100%, so treat the figures as the issuer's own wording.
- The exam is 70 multiple-choice questions in 4 hours; 60 are scored and 10 are unscored pilot items.
- The exam references the 2017 NEC, and the NEC is the only reference allowed in the exam.
How the PVIS Blueprint Is Built
The NABCEP PV Installer Specialist (PVIS) Board Certification is built on a job task analysis, and the exam specification is the part that matters most to a candidate. The blueprint lists 13 weighted headings. Each heading maps to something an installer with decision-making responsibility is expected to do on a real project, from writing a site safety plan to landing modules on a roof or ground mount.
Two details are easy to miss. First, this is a written, multiple-choice exam, not a hands-on performance test. You will not demonstrate torqueing a lug; you will be asked to choose correct answers about installation practice, code requirements, and safe decision-making. Second, the published weights add up to 98%, not 100%. Rather than guess where the missing 2% lives, plan your prep around the 13 headings exactly as written and do not assume an unlisted domain exists.
This guide is built on the PVIS examination specification in NABCEP's job task analysis and the 2025 Certification Handbook. It is not a substitute for reading those sources, which are linked from NABCEP's program page. If you are still deciding whether to pursue the credential, start with What Is PVIS Certification? and PVIS Requirements 2026: Eligibility, Prerequisites & How to Qualify.
All 13 Domains and Their Published Weights
The table below reproduces the examination-specification headings and weights. Because the exam draws 60 scored questions from these areas, even a 3% domain can still show up on your test, but the larger domains deserve proportionally more of your hours.
| # | Domain | Weight |
|---|---|---|
| 1 | Develop safety plan | 8% |
| 2 | Safeguard against hazards | 10% |
| 3 | Install raceways | 7% |
| 4 | Install electrical equipment | 8% |
| 5 | Install DC PV system conductors | 8% |
| 6 | Install AC PV system conductors | 8% |
| 7 | Install grounding & bonding | 10% |
| 8 | Complete utility interconnection point | 8% |
| 9 | Install system monitoring, control, and communication hardware | 3% |
| 10 | Install battery equipment | 7% |
| 11 | Install ground-mounted structure | 5% |
| 12 | Install building-mounted system | 8% |
| 13 | Install PV modules | 8% |
Notice the shape of the blueprint. Electrical content dominates: Domains 3 through 8 and Domain 10 together cover most of the weight, and even the safety domains lean heavily on electrical hazards. A candidate who is strong on roofing and racking but shaky on conductors and grounding will struggle. For a broader view of how demanding that mix feels, see How Hard Is the PVIS Exam? Complete Difficulty Guide 2026.
Safety Domains: Plan and Hazards
Domains 1 and 2 account for 18% of the published weight combined, and they set the tone for the rest of the exam. The questions test judgment: what a competent installer with decision-making authority would do, not just what a worker would be told to do.
Domain 1: Develop safety plan (8%)
This domain is about planning before work starts. Expect scenario-style questions on how a crew identifies and documents risks for a specific job.
- Site-specific hazard identification before mobilizing
- Roles and responsibilities for safety on a multi-person crew
- Emergency planning and communication on the jobsite
- Selecting appropriate protective equipment for the task and site
Domain 2: Safeguard against hazards (10%)
Tied for the heaviest weight in the blueprint. This is where plan becomes practice: controlling electrical, fall, and environmental hazards during installation.
- Energized-conductor hazards, including the fact that PV arrays produce voltage whenever there is light
- Fall protection when working on roofs and elevated surfaces
- Safe handling of modules, equipment, and batteries
- Lockout and de-energization concepts as they apply to PV and storage
The OSHA 10 Construction requirement in the eligibility rules is not a coincidence. Candidates who completed that training and have real fall-protection and electrical-safety habits will find these domains more intuitive than candidates who learned PV from a classroom alone.
Wiring Domains: Raceways, Conductors, and Equipment
Domains 3 through 6 form the electrical core of the exam. Together they represent 31% of the published weight, and nearly every question here is anchored in the 2017 NEC, the edition the exam uses even if your training course taught a newer one.
Domain 3: Install raceways (7%)
Questions focus on choosing, supporting, and protecting the pathways that carry PV circuit conductors.
- Raceway types and where each is appropriate
- Support, securing, and protection against physical damage
- Rooftop raceway considerations, including exposure to temperature
- Fill and bending limits as they affect pulling conductors
Domain 4: Install electrical equipment (8%)
This covers the physical equipment in the system, such as inverters, combiners, disconnects, and enclosures.
- Mounting location and working-space requirements
- Disconnecting means and overcurrent protection placement
- Equipment ratings, listings, and labeling
- Enclosure suitability for the environment
Domain 5: Install DC PV system conductors (8%)
DC-side wiring has its own rules, and the exam expects you to know them cold.
- Conductor selection, insulation type, and sizing for PV source and output circuits
- Connector compatibility and proper termination
- Wire management that avoids abrasion and sunlight degradation
- Identification and polarity practices
Domain 6: Install AC PV system conductors (8%)
On the AC side, the questions look more like conventional building-wiring problems with PV-specific twists.
- Conductor and overcurrent device sizing for inverter outputs
- Terminations and torque practices
- Voltage-drop awareness for longer runs
- Color coding and circuit identification
Because the exam permits an on-screen basic scientific calculator, expect some sizing and voltage-drop questions that involve arithmetic. You are not meant to derive formulas from scratch, but you do need to know which NEC article or table applies and how to apply it quickly. If you need a condensed list of reference points, the PVIS Cheat Sheet 2026: One-Page Review of Must-Know Facts is a useful companion.
Grounding and Bonding
Domain 7: Install grounding & bonding (10%)
Joint largest domain on the exam, and a frequent source of lost points because the terminology is dense and the distinctions are subtle.
- Equipment grounding versus system grounding, and why the difference matters
- Grounding electrode conductor concepts and connections
- Bonding of metallic parts, racking, and module frames
- Listed grounding and bonding hardware and how it is installed
- Continuity and the consequences of a compromised ground path
Key Takeaway
Pair Domain 7 with Domain 2 in your review. Grounding is both a code topic and a safety topic, and a single scenario question can test both at once. If you can explain why a bond or ground exists, not only where the NEC requires it, you will answer scenario questions faster.
Interconnection, Monitoring, and Batteries
Domain 8: Complete utility interconnection point (8%)
This is where the PV system meets the grid and the building's electrical service. It rewards candidates who have actually walked through an inspection and utility sign-off.
- Point-of-connection methods and the rules that govern them
- Busbar and overcurrent considerations at the service or panel
- Required labeling and disconnects at the interconnection
- Coordination with the utility and the authority having jurisdiction
Domain 9: Install system monitoring, control, and communication hardware (3%)
The lightest domain by weight, but not one to ignore entirely. Questions tend to be practical and hardware-focused.
- Placement and wiring of monitoring devices and gateways
- Communication cabling and network connection basics
- Sensors, meters, and control devices commonly installed with PV systems
- Separating low-voltage communication wiring from power conductors
Domain 10: Install battery equipment (7%)
Energy storage is a standalone domain on this exam, which reflects how common batteries have become on residential and small commercial jobs.
- Battery location, ventilation, and working-space considerations
- Disconnecting means and overcurrent protection for battery circuits
- Safe handling, installation, and terminal practices
- Labeling and integration with the rest of the PV system
Candidates coming from grid-tied-only backgrounds sometimes under-prepare for Domain 10. At 7% it carries roughly the same weight as raceways, so it deserves real hours, especially if your experience has been limited to systems without storage.
Structures and Modules
The final three domains cover the physical array: how it is attached to a building or the ground, and how modules are installed. Together they represent 21% of the published weight.
Domain 11: Install ground-mounted structure (5%)
Ground mounts bring foundations, trenching, and different wind and soil considerations into play.
- Foundation and anchoring approaches
- Structural assembly sequence and fastener practices
- Site grading, drainage, and access considerations
- Grounding and bonding of the structure itself
Domain 12: Install building-mounted system (8%)
Roof-mounted work is the bread and butter of most installers, and this domain tests the details that keep roofs from leaking and arrays from failing.
- Locating rafters and structural attachment points
- Flashing and sealing roof penetrations
- Racking layout, spacing, and fastener selection
- Roof-access safety and working around existing roof features
Domain 13: Install PV modules (8%)
The last domain brings the array together at the module level.
- Handling and placing modules without damaging cells or glass
- Mounting to rails per manufacturer instructions
- Module-level wiring, connectors, and wire management
- Verifying orientation, spacing, and alignment against the design
Sequencing the Domains in Your Prep
You do not need a generic study plan, but you do need a sensible order. The sequence below puts the highest-weight and most code-dependent domains early, while your reference habits are still being built, and saves the lighter, more hardware-oriented domains for later. Adjust the pacing to your own schedule and experience.
Safety foundation
- Domains 1 and 2 (18% combined)
- Review OSHA 10 material alongside PV-specific hazards
Grounding and bonding
- Domain 7 (10%, tied for largest)
- Practice navigating the 2017 NEC to find grounding requirements fast
Conductors and raceways
- Domains 3, 5, and 6
- Work sizing and voltage-drop problems with the on-screen calculator in mind
Equipment, interconnection, batteries
- Domains 4, 8, and 10
- Focus on disconnects, overcurrent protection, and labeling
Structure, modules, and monitoring
- Domains 9, 11, 12, and 13
- Finish with full-length practice sets to find weak spots
For a fuller walkthrough of preparation habits and resources, see the PVIS Study Guide 2026: How to Pass on Your First Attempt, and use the PVIS practice tests to check yourself against exam-style questions as each domain wraps up.
Exam Format, Fees, and the NEC Reference
Knowing the domains is half the job. The other half is understanding the exam itself and the administrative steps around it.
Format and scoring
- Length: 70 multiple-choice questions with four answer choices each, in 4 hours.
- Scored versus pilot items: 60 questions count toward your result; 10 are unidentified unscored pilot items. You cannot tell which is which, so treat every question seriously.
- Weighting: scored questions are equally weighted.
- Passing score: 70 on a 0-99 scaled score, not 70% correct. The details are in PVIS Passing Score 2026: Exactly What You Need to Pass.
- Delivery: initial examination through test-center computer-based testing or live remote proctoring, administered through Meazure Learning.
Reference materials
The NEC is the only reference permitted. You get an electronic PDF during the exam, or you may bring a compliant softbound or spiral-bound physical copy of the NEC, of any year. Pre-exam highlighting is allowed, but notes, tabs, inserted materials, and photocopies are not. The exam itself is written to the 2017 NEC, so if you use a different edition, be aware of where articles have changed. A basic scientific calculator is built into the exam screen; personal calculators are not allowed.
Fees and eligibility
| Item | Amount |
|---|---|
| Application fee | $125 |
| Examination fee | $375 |
| Application plus exam, before training | $500 |
| Retake | $275 |
| Recertification | $390 |
| Additional international testing fee (outside the United States and Canada) | $75 |
Eligibility is not trivial. You must be 18 or older, agree to the ethics policy, hold OSHA 10 Construction or a government equivalent, complete 24 advanced contact hours within five calendar years (18 PVIS-JTA hours from an accepted institution plus 6 NEC hours), and document decision-making installation experience worth at least six project credits. Qualifying projects are completed within the preceding two calendar years and are at least 1 kW DC; systems from 1 to 999 kW earn two credits and 1 MW or larger earn three. A separately documented veterans pathway also exists. For the cost picture, see PVIS Certification Cost 2026: Complete Pricing Breakdown, and for scheduling windows, see PVIS Exam Dates 2026: Testing Windows, Deadlines & Scheduling. Eligibility runs for one year from application approval, and the scheduling pages describe a six-month Notice-to-Schedule deadline, so confirm your own timeline against the Notice to Schedule you receive.
Who this credential serves
The specification is written around installers who make decisions on real projects, so the people who benefit most are lead installers, crew leaders, and installation supervisors at residential and commercial solar contractors, along with electricians moving into PV work. The published sources do not give a credential-specific pass rate or a certification-only salary premium, so be skeptical of any site that quotes precise numbers. For what we can say, see PVIS Pass Rate 2026: What the Data Shows, PVIS Salary Guide 2026: Complete Earnings Analysis, and Is the PVIS Certification Worth It? Complete ROI Analysis 2026.
Frequently Asked Questions
Safeguard against hazards and Install grounding & bonding are tied at 10% each. Several domains sit at 8%, including Develop safety plan, Install electrical equipment, both conductor domains, Complete utility interconnection point, Install building-mounted system, and Install PV modules.
That is how the issuer's examination-specification table publishes them. No missing domain is identified, so candidates should study the 13 listed headings as written and not try to fill in the remaining 2%.
The exam reference edition is the 2017 NEC. You may bring a compliant physical NEC of any year, but the questions are written to 2017, so know where newer editions differ. Newer training-course code editions do not by themselves indicate a change to the exam.
No. It is a 70-question multiple-choice exam, with 60 scored questions and 10 unscored pilot items. Hands-on experience matters because the questions test installation judgment, and because the eligibility rules require documented project experience, but you will not perform physical tasks during the exam.
Work through each domain, then take timed practice sets and track your results by domain. If you consistently miss questions in the grounding, conductor, or interconnection areas, spend extra time there before you use your Notice to Schedule. You can start with the PVIS practice tests and read the PVIS Exam Domains 2026: Complete Guide to All 13 Content Areas again as a checklist.