PVI1 Exam Domains 2026: Complete Guide to All 8 Content Areas

How the Eight PVI1 Content Areas Are Organized

The Photovoltaic Installer - Level 1 (PVI1) credential from ETA International is built on a single document: the Photovoltaic Installer - Level 1 (PVI1) Competency Requirements, an eight-page PDF carrying a 2022 copyright. ETA states that certification examination questions are derived from the competencies in that document. For a candidate, that makes the competency list the closest thing to an official syllabus.

The document sets out eight numbered categories:

1. History and Background of Renewable Energy
2. Photovoltaics Terminology
3. Installation and Safety
4. Codes and Standards
5. Theory of Operation
6. Applied Calculations and Formulas
7. Estimating Home Energy Needs
8. Project Management

Two further points about the document are worth knowing. First, the introductory hands-on task list is not a ninth domain; it describes the practical skills side of the credential and sits alongside the eight numbered areas. Second, the PDF mixes older code and reference editions, including NEC 2017 and a 2020 NEC study resource, so no single current NEC edition is established for the exam. When you read the codes section later in this guide, keep that limitation in mind and study the competency wording itself rather than memorizing article numbers from one edition.

If you are still orienting yourself to the credential, the overview pages What Is PVI1 Certification? and PVI1 Requirements 2026 cover the basics. This guide goes deeper on the content itself.

The Exam Behind the Domains: Format, Fees and Rules

Before diving into each domain, it helps to know what the knowledge exam actually looks like. The facts below come from ETA's current PVI1 information and its posted certification catalog.

A few honest caveats. ETA does not disclose how many of the 75 questions are scored versus unscored, and a current issuer statement spelling out the exact item format or the practical scoring rubric was not found. An older Florida Department of Education record describes the exam as 75 multiple-choice questions, but that is historical and should not be treated as a current format guarantee. The practical skill demonstrations are separate from the 75-question count.

Testing is administered through ETA Certification Administrators. ETA's general administration system offers Trapeza online testing and paper-and-pencil delivery. Hands-on training and skill demonstrations run through an ETA-approved trainer or school. General rules call for photo identification, allow a non-programmable or scientific calculator, and prohibit phones and other electronic devices. Remote proctoring is offered for non-hands-on certifications, but PVI1 eligibility for remote knowledge testing is not confirmed, so check with ETA before assuming you can test from home.

For the money side in full, see PVI1 Certification Cost 2026. For scoring details, see PVI1 Passing Score 2026.

Domains 1 and 2: Background and Terminology

Domain 1: History and Background of Renewable Energy

It is tempting to skim this domain because it feels like "soft" material. That is a mistake in a 75-question exam where every item counts toward a 75% threshold. Background questions tend to be the most forgiving points on the paper, so losing them to overconfidence is an avoidable cost. Read the competency wording for this category closely and make sure you can explain each listed concept in a sentence or two.

Domain 2: Photovoltaics Terminology

A practical way to handle Domain 2 is to build a personal glossary as you work through the other seven domains. Every time you meet an unfamiliar word in the competency document or your training course, add it. By the time you reach the calculation material, the glossary doubles as a quick-reference sheet. Our PVI1 Cheat Sheet is a good model for how to compress this vocabulary onto a single page.

Domains 3 and 4: Installation, Safety, Codes and Standards

Domain 3: Installation and Safety

Because ETA requires hands-on training from an approved trainer or school, many candidates meet Domain 3 first on a roof or in a lab, and then again as written questions. Use that overlap. When you practice a task physically, ask yourself what question an exam writer could build from it, such as why a step is done in a certain order or what hazard it addresses.

Domain 4: Codes and Standards

Codes and standards questions reward understanding over rote recall. If you know why a requirement exists (for example, to protect firefighters, inspectors or homeowners), you can often reason your way to the right answer even when a specific number escapes you.

Domains 5 and 6: Theory of Operation and Calculations

Domain 5: Theory of Operation

You do not need an engineering degree for Level 1, but you do need a working mental model. A useful test: can you explain, in plain language, what happens between sunlight striking a module and a lamp turning on inside a house? If you can walk through every component in that chain, you are in good shape for this domain.

Domain 6: Applied Calculations and Formulas

ETA's general rules allow a non-programmable or scientific calculator, and programmable calculators may need to be reset. Practice with the same kind of calculator you plan to bring so keystrokes are automatic. Also note that the published formula-sheet authorization on ETA's site names other exams, not PVI1, so do not count on being handed a formula sheet. Memorize the essentials and rehearse them until they are second nature.

Domains 7 and 8: Home Energy Estimates and Project Management

Domain 7: Estimating Home Energy Needs

Think of Domain 7 as Domain 6 with a customer attached. The same arithmetic applies, but questions are framed around a homeowner's situation. Practicing with a few real utility bills (your own, a relative's) is far more effective than working abstract examples, because it forces you to find the relevant numbers amid the clutter.

Domain 8: Project Management

One third-party comparison table claims Level 1 includes no project management. ETA's own competency PDF lists project management as category 8, and the issuer document is the authority here. If you see conflicting claims online, defer to the competency list. Project management questions tend to reward practical, job-site common sense, so candidates with field experience often find this domain approachable.

Where the Hands-On Skill Demonstration Fits

PVI1 is a two-part credential: a 75-question knowledge exam and hands-on skill demonstrations. The competency document opens with an introductory hands-on task list that describes the practical side. It is not a ninth numbered domain, but it matters, because hands-on competency is required in addition to the 75% knowledge score. No separate numerical practical cut score was verified.

The current ETA page requires hands-on training from an ETA-approved trainer or school. The competency PDF indicates practical skills are demonstrated before sitting the knowledge exam, and it allows ETA to review proof of prior job experience in lieu of trainer-taught skills. That is a discretionary review by the issuer, not an automatic experience waiver, so do not plan around it without confirming with ETA first. No universal minimum number of training hours, degree, or age requirement was verified from current issuer material. Course lengths you see advertised (40, 45, 46 or 60 hours) belong to specific providers and are not universal PVI1 rules.

Self-study courses are useful for the knowledge side but explicitly do not replace the certification requirements. Details on training routes are in PVI1 Training, and the full eligibility picture is in PVI1 Requirements 2026.

A Domain-by-Domain Study Sequence

Since ETA publishes no weights, a sensible plan front-loads vocabulary and the calculation foundation, then layers context on top. This sequence is one way to do it; adjust based on your own training schedule and weak areas.

Why this order? Terminology and theory make everything else readable, calculations need the most repetition, and safety and codes benefit from being paired with hands-on work happening in parallel. For a fuller plan, read the PVI1 Study Guide 2026, and when you are ready for timed sets, use the original practice questions on the PVI1 Exam Prep practice test site. Those items are competency-aligned originals, not actual ETA exam questions, and they are not an official mock exam.

What Passing Leads To

Passing earns a certification with a four-year term and a maintenance requirement. ETA's hands-on maintenance track calls for six continuing-education hours per year (24 over the four years), a supervisor-signed Employer Verification Form, a Certification Maintenance Form, and $25 per year ($100 over the cycle). Plan for that from day one so a lapse does not surprise you.

On the career side, the U.S. Bureau of Labor Statistics reports May 2025 median pay for solar photovoltaic installers of $53,140 per year ($25.55 per hour). That figure describes the occupation as a whole, not PVI1-certified workers specifically, and it is not a measured credential premium. Whether the investment pays off for you depends on your local market and employer. For more on that, see PVI1 Salary Guide 2026, PVI1 Jobs and Is the PVI1 Certification Worth It?

If you are weighing PVI1 against NABCEP's PV Associate, keep in mind that those are different credentials from different bodies with different structures; verify each issuer's current details directly rather than relying on a third-party comparison table.

Frequently Asked Questions