PVOL202: Solar Training - Advanced PV System Design and the NEC (Grid-Direct) - Online

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Take a deep dive into National Electrical Code (NEC® 2020) standards as well as other best practices that pertain to designing safe and efficient grid-direct PV systems. PV202 focuses on residential and commercial-scale systems, but the Code requirements, design parameters, and best practices are applicable to all types and sizes of PV installations, including utility-scale. Detailed lessons address requirements for disconnects, overcurrent protection, and wire sizing; interconnection requirements and calculations; grounding, ground-faults, and surge protection; calculations and examples for system sizing, inverter selection, and electrical configuration; ground and roof mount details; and labeling and data acquisition systems.

PREREQUISITE COURSE: Before participating in the PVOL202 course, students MUST complete PV101 or PVOL101, have NABCEP certification, take an equivalent course from another organization or demonstrate field experience and pass a placement quiz.

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Students who complete PVOL202 will be able to:

  • Define the purpose of the National Electrical Code (NEC®) and NEC® terminology for PV equipment
  • Determine procedures for proper installation of equipment and conductors, including minimum requirements for working space
  • Examine methods for PV wire management and determine where expansion fittings are required
  • Describe and identify electrical services, including split-phase and three-phase Wye (Y) and Delta (∆)
  • Evaluate electrical service details to collect and record during solar site evaluation
  • Identify options for NEC®-compliant PV system interconnection to the utility grid and determine whether a supply side, load side, or additional service connection is appropriate
  • Identify code-compliant methods for connecting an inverter to an existing AC feeder
  • Calculate PV module voltage based on temperature to ensure compatibility with system components and NEC® Section 690.7, and explore other options for maximum PV system DC voltage calculations
  • Identify NEC® requirements and sizing of disconnects and overcurrent protection devices (OCPDs) in grid-direct PV systems
  • Define inverter grounding configurations
  • Evaluate inverter choices and system configurations, including string inverters, central inverters, and module level power electronics (MLPE)
  • Identify requirements for equipment grounding, equipment grounding conductors (EGC), and grounding electrode conductors (GEC), and size the conductors according to the NEC®
  • Identify common causes of ground-faults and arc-faults
  • Describe ground-fault and arc-fault protection devices
  • Describe benefits and appropriate locations of surge protection devices (SPD)
  • Demonstrate the use of sun charts and perform calculations to determine row spacing and minimize inter-row shading
  • Identify how Codes detailing access for first responders impact PV array roof layout
  • Examine fire classifications that affect racking and module selection
  • Detail NEC rapid shutdown requirements and options for implementation
  • Identify load and structural considerations for low- and steep-slope roof-mounted PV systems
  • Calculate wind uplift force and select appropriate lag bolts
  • Review issues related to planning, design, and installation of ground-mount PV arrays
  • Review PV system circuit terminology, definitions, and conductor types
  • Calculate minimum overcurrent protection device (OCPD) size and conductor ampacity using appropriate adjustment and correction factors
  • Calculate voltage drop and verify system operation within acceptable limits
  • Examine requirements for PV system labeling
  • Calculate the maximum and minimum number of modules per PV source circuit, and number of PV source circuits per inverter
  • Determine size of residential grid-direct PV system based on site and customer-specific considerations including the number and wiring layout of modules, conductor and OCPD sizes, and the AC interconnections
  • Determine the size of a large, multiple inverter, grid-direct PV system based on site and customer-specific considerations, including the quantity and layout of modules and inverters and the AC interconnection
  • Define large-scale PV and review associated NEC® allowances and requirements
  • Describe importance of Data Acquisition Systems (DAS)
  • Identify common DAS equipment and hardware
  • Review DAS design, installation, and commissioning processes and common
    problems associated with DAS
  • Show how reports can be generated and utilized to remotely assess health of
    system

PREREQUISITE COURSE: Before participating in the PVOL202 course, students MUST complete PV101 or PVOL101, an equivalent course from another organization, have NABCEP certification, or demonstrate field experience and pass a placement quiz. Please contact [email protected] if you feel you are qualified to skip the prerequisite for PVOL202.

ONLINE CAMPUS DETAILS: Students can log into their course at any time for the full duration of the specified course. The course is self-paced with no required log-in times, but all graded materials must be completed by the end date of the course. Live instructors give feedback, grade your work and answer questions in discussion forums or by email.

Click here for Computer & Software Requirements for online courses.

To view in-person sessions of this workshop, click PV202.

For information on SEI’s Solar Professionals Certificate Program please click here.  For information on SEI’s workshop and training program policies please click here.

Complete School Catalog
Políticas de Capacitación

WORKSHOP AND TRAINING PROGRAM POLICIES

Solar Energy International (SEI) is approved and regulated by the Colorado Department of Higher Education, Division of Private Occupational Schools.* 

Enrollment:  Prospective students may enroll anytime.  Late enrollments will be accepted on an individual basis for online courses, and the first day of class for in-person and hands-on labs courses.  Enrollment is on a first-come basis and class sizes are limited. To reserve a space you can register online or call in to register at 970-527-7657 option 1 and make payment in full. If you are sending a check, call first to check on availability and to let us know that you are sending payment.

Lodging & Logistics:  SEI’s main campus and Lab Facility is in Paonia, Colorado.  For detailed info about Paonia click here.  Local logistics and lodging for each workshop venue are available on the location page for each workshop. More information will also be sent to registered students upon confirmation of registration.

Waiting List:  If a workshop is full we will place you on the waiting list. There is no charge to be on the waiting list. If space becomes available, we contact the first person on the list. You then have 24 hours to register before we move on to the next person.

Cancellation & Refund Policies:  Students not accepted to the school are entitled to all moneys paid.  Students who cancel this contract by notifying the school within three (3) business days (*of original registration) are entitled to a full refund of all tuition and fees paid.  Students, who withdraw after three (3) business days, but before commencement of classes, are entitled to a full refund of all tuition and fees paid except the maximum cancellation charge of $150.00 or 25% of the contract price, whichever is less.  In the case of students withdrawing after commencement of classes, the school will retain a cancellation charge plus a percentage of tuition and fees, which is based on the percentage of contact hours attended (if training is offered as distance education: “based on the percentage of no. of lessons completed”)*.  The refund is based on the official date of termination or formal documented withdrawal.  Please visit ‘Complete school catalog’ link above for full cancellation information and refund table.  If you are unable to complete your course due to illness or natural disaster, please contact the administration office.

If SEI Cancels a Class: In the event a class is cancelled for a reason beyond SEI’s control, SEI will work with the student to reschedule them into future online or in-person classes at no fee. Any remaining credit will be held for up to two years in this situation. If a student chooses not to reschedule for a future online or in-person class, and instead would like a tuition refund, then SEI will charge a cancellation charge of $150.00 or 25% of the contract price, whichever is less. SEI is not responsible for losses incurred on housing, travel or other arrangements.

Entrance Requirements:  SEI is an open enrollment training organization.  However, students still must meet the prerequisites for any course(s) for which they would like to register. Additionally, if a student wishes to be considered for admission into the SEI Solar Professionals Certificate Program, a separate application for admission is required. This program is a selective admissions program where we ask students to complete an application that requires an essay where they can indicate their dedication to successful program completion and their relevant  transferable skills that would make them a good candidate for this rigorous training program. Please see application for details, https://www.solarenergy.org/sei-solar-professionals-certificate-program/.  The school does not discriminate based on race, sex, religion, ethnic origin, or disability.  By completing the SEI enrollment agreement, all students agree to comply with the requirements and directions of the training and supply any information that is relevant to safety and medical issues.  Additionally, students completing this enrollment agreement attest to the fact that he or she is physically capable of performing all requirements of the training and agree to comply with all safety regulations and directions given by instructional staff.

Online Course Requirements: By registering for online courses you confirm that you have basic computer literacy skills needed to take an online course. This includes the ability for internet usage, browser based applications, word processing, and email applications. You also confirm that you have consistent and reliable access to high speed internet and a computer. Click here for further online course information.

Previous Credits: Credits from another institution will be evaluated on a case-by-case basis. SEI only allows the transfer of a PV101 equivalent course with the same amount of contact hours and learning objectives as SEI’s PV101 course. The student may be asked to provide a transcript, certificate of completion, course catalog, link to the course description from the transferring school’s website showing equivalent course, and will be required to take a PV101 opt-out quiz to prove proficiency of course material. SEI does not guarantee transferability of our credits to another institution unless there is a written agreement with another institution.

Attendance / Online Course Progress Requirements: For SEI’s in-person classes and hands-on lab sessions, students are expected to arrive on time for class with proper materials and stay for the full duration of each class day. Additionally, students must attend all class days required for any given course. Instructors will take daily attendance and keep record of the class attendance with SEI’s Student Services Department. Missing class, excessive tardiness, or early departure constitute unsatisfactory attendance and the student will be dropped from the class. This will result in the student not earning the record of completion for that class and forfeiting any documented training hours for that class. If a student does not successfully complete a course they will need to register and retake the course. All tuition fees apply. In the SEI Online Campus, course participation and acceptable progress is determined by attempting all quizzes and earning a cumulative average score of 70% or higher in the course. Not doing so, will result in the student not earning a record of completion and forfeiting any documented training hours for the course. Students who are unable to continue classes for medical reasons or severe personal problems will be required to take a leave of absence until they are able to return to class. Proper documentation will be required and a formal request for withdrawal will be required to substantiate a student’s withdrawal request.

Progress Policy: Students must maintain a 70% or higher grade point average to complete the SEI Solar Professionals Certificate Program. The student may be dropped from the program if acceptable progress is not satisfactory after multiple attempts to pass a course. Dropping of a student from the SEI Solar Professionals Certificate Program shall be at the school Director’s discretion. The Executive Leadership Team has final authority and shall notify the student of the final decision.

Financial Assistance:  SEI has a limited number of partial tuition scholarships available for international and low-income participants. We also offer a work/trade program for people taking 8 weeks or more of workshops.  Click here for additional info.

Placement Assistance:  Solar Energy International (SEI) offers employment assistance to graduates, consisting of job lead referrals and job skills development.  While providing resources to help you in your job search, we make no guarantee, expressed or implied, of future employment.  Current law prohibits any school from guaranteeing job placement as an inducement to enroll students.

Classroom Support: Solar Energy International strives to support all students. If a student requires extra support and wishes to discuss possible options, they will need to contact Student Services at, [email protected], prior to the start of their course.

Conduct Policy:  All students are expected to act maturely and are required to respect other students and faculty members.  Possession of weapons, illegal drugs, and alcohol of any kind are not allowed at any time on school property.  Any violation of school policies may result in permanent dismissal from school.

Dismissal: Any student may be dismissed for violations of rules and regulations of the school, as set forth in school publications. A student also may be withdrawn from classes if he or she does not prepare sufficiently, neglects assignments, or makes unsatisfactory progress. The Vice President of Student Services, after consultation with all parties involved, makes the final decision. The Vice President of Student Services may temporarily suspend students whose conduct is disruptive or unacceptable to the academic setting. After appropriate counseling, students who demonstrate a genuine desire to learn and conform to school standards of conduct, may be allowed to resume attendance. The Vice President of Student Services will review each case and decide upon re-admittance.

Transcript/Diploma/Certificate Financial Hold Exemption Policy: Detailed information about holds on registrations, transcripts and/or records of completion due to unpaid accounts can be found here.

Student Grievance Procedure: If a student has a grievance regarding any SEI policy or staff member they should contact, via email, SEI’s Vice President of Student Services, Monique Turek at [email protected]. Students should first discuss any instructional grievances directly with their instructor. If unable to come to a mutually acceptable conclusion, students should contact, via email, SEI’s Vice President of Curriculum & Instruction, Wendy Knapp at [email protected]. Final decisions may be appealed to SEI’s Executive Leadership Team at [email protected]. Once a grievance is submitted via email to the Executive Leadership Team, within one week, they will investigate the grievance and arrange an appointment if necessary with the student for discussion. Every effort will be made to resolve any grievance in a timely manner.

Student Complaints: Attempting to resolve any issue with the School first is strongly encouraged. Complaints may be filed by a student or guardian at any time online with the Division of Private Occupational Schools (DPOS) within two years from the student’s last date of attendance or at any time prior to the commencement of training at 303-862-3001.

Health: For information on our health policy, click here.

SEI Contact Training Hours: 6 Weeks Online = 60 hours

This course provides approved credit hours towards the following NABCEP Certifications and Recertifications:

  • PV Installation Professional
  • PV Design Specialist
  • PV Installation Specialist
  • PV Commissioning and Maintenance Specialist
  • PV Technical Sales Professional
  • PV Associate (Renewal only)
  • PV System Inspector (Recertification only)
  • SH Associate (Renewal only)
  • Solar Heating System Inspector (Recertification only)
  • Solar Heating Installer (Recertification only)

Please visit NABCEP’S online course catalog for credit hours breakdown.

For information on SEI’s Solar Professionals Certificate Program please click here.

more on nabcep certification > sei's solar professionals certificate program info >


The 2020 National Electrical Code Book (NEC) is required for the PVOL202 training.  If you do not already have a copy you can purchase your book or PDF of the book at the NFPA website by clicking here.  NFPA makes important safety codes and standards, including the 2011, 2014, 2017 and 2020 NEC available for free online. This book is NOT included in the tuition of the PVOL202 course.

You will have access to a Digital Course Notebook from within the online course, that can be downloaded for reference after the course completion date.

christopher Hoffman
christopher Hoffman
1734444941
SEI helped me get a start in solar 15 years ago and they continue to improve their educational content. I highly recommend their courses for anyone getting into the industry or interested in furthering their career.

Daniel Cruz
Daniel Cruz
1734314515
The course was very simple. Basically just watched video lectures and answered multiple choice questioned quizzes, which were also very simple. I am looking forward to attending the in person lab to get a feel for working with the installation equipment, tools, and procedures. I’ll probably have a better review of the course after completing the lab.There wasn’t much interaction with my instructor-not a bad thing. There were three graded assignments that needed to be submitted through the course portal. All of the instructions for the assignments were clear and straight forward. They were also very simple.After completing the course, I think I would have planned my approach a bit differently; reading more of the textbook and additional resources to broaden my scope of the course material and overall subject matter. I’m hoping that I still have access to the course materials to review the course content later.Overall content, but still eager to learn the technical hands-on skills.

Stephen Ward
Stephen Ward
1734102213
SEI provides a great curriculum packed with information and instructors that care about everything involved! I Took PV101 online and you can really tell how much they enjoy working with solar and teaching the world about regenerative energy.

Cailin Greengo
Cailin Greengo
1733858296
PV101 was a well-made online class. For those who have no or very little PV related knowledge, this course would be perfect. I did wish there were more details in certain areas since I already work in the field, but I learned most of the material I took the course to learn. Self-paced and very doable. I work full-time and spent 1 workday per week over the course timeframe (about 8-10 hours per week) for those wondering. Instructors were very responsive and friendly.

Nicholas Brown
Nicholas Brown
1733329467
PV 101 Online was a great certification course to take. SEI does a great job on teaching the content thoroughly. It’s not always exciting content, but the videos are easy to follow along with.

Desmond Poirier
Desmond Poirier
1731867024
SEI is a top notch organization. They do great work advancing the in depth professional value of the solar industry; and their educational training is quite a value.

Sequoyah H
Sequoyah H
1730488921
I just completed the online PV101 course with SEI. I found the course extremely thorough, very informative, and really beneficial. I feel that this was a significant step in preparing myself to enter the solar industry.

David Finnie
David Finnie
1726700853
SEI is an absolutely necessary education before laying hands on PV solar systems. I would never recommend anyone go into active practice of solar installation/commissioning without attending and gaining the crucial knowledge that is learned here. SEI houses amazing and heavily capable/knowledgable teachers. You learn from SEI, you learn from the best.

Manuel Figueroa
Manuel Figueroa
1726671078
The online course I took through SEI was one of the most comprehensive and practical educational experiences I’ve had. The instructors were incredibly knowledgeable, with real-world experience that made the content relevant, The flexibility of the online format allowed me to study at my own pace, and the community of learners and professionals provided valuable insights. After completing the course, I feel well-prepared to take the NABCEP exam, this certification has significantly boosted my career in the Solar Industry.

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