Solar PV Design Exam Prep practice questions and answers 2026. Tap an option to test yourself — you'll see the correct answer and a plain-English explanation for every question. Free, no login.
Q11According to most electric service providers, which of the following is typically required before a PV system can be interconnected to the grid?
✓ Correct answer: B. Signed interconnection agreement
An interconnection agreement is a legal contract between the customer and the utility that must be executed before a PV system can be connected to the grid, outlining terms, conditions, and responsibilities.
Q12When reviewing the construction plan set for a new commercial building with planned PV, which drawing would contain information about the existing electrical service capacity?
✓ Correct answer: A. Electrical site plan
Electrical site plans typically show the existing electrical service capacity, including service entrance, main panel location, and capacity information that is critical for PV integration planning.
Q13Which type of document would specify the wind and snow load ratings that a roof-mounted PV system must be designed to withstand?
✓ Correct answer: D. Structural engineering specifications
Structural engineering specifications detail the required wind and snow load ratings that any rooftop equipment, including PV systems, must be designed to withstand based on local conditions and building codes.
Q14According to the 2017 NEC, what is required for PV systems on buildings with rapid shutdown?
✓ Correct answer: C. Conductors limited to no more than 30 volts within 30 seconds
NEC 690.12 requires that conductors be limited to no more than 30 volts within 30 seconds of rapid shutdown initiation, providing safety for first responders in emergency situations.
Q15When reviewing project criteria for a proposed PV system, which document would contain the requirements for fire department access pathways on the roof?
✓ Correct answer: B. Local fire code
Local fire codes specify requirements for access pathways on roofs with PV systems to ensure firefighters have safe access routes for emergency operations.
Q16Which of the following utility requirements would MOST directly affect the electrical configuration of a grid-tied PV system?
✓ Correct answer: A. Power factor requirements
Power factor requirements directly affect the electrical configuration of the system, as they dictate how the inverter must be programmed to deliver power at a specific power factor to maintain grid stability.
Q17When reviewing covenants for a residential PV installation, which restriction would MOST impact the system's energy production capability?
✓ Correct answer: D. Restrictions on module orientation
Restrictions on module orientation can significantly impact energy production as they may prevent optimal positioning of panels to capture maximum sunlight, potentially reducing system output substantially.
Q18According to the 2017 NEC, ground-mounted PV array fences must be at least how far from the array?
✓ Correct answer: C. 36 inches
NEC 110.31 requires a minimum distance of 3 feet (36 inches) between ground-mounted PV arrays and fences to allow adequate working space for maintenance and service.
Q19When reviewing electric service provider requirements, which of the following would typically be needed for systems larger than 10kW?
✓ Correct answer: B. Professional engineer's stamp on interconnection plans
Systems larger than 10kW typically require a professional engineer's stamp on interconnection plans to verify that the system meets all utility and code requirements, ensuring safe and proper grid connection.
Q20Which construction document would provide information about the existing electrical panel's bus bar rating?
✓ Correct answer: A. Electrical single-line diagram
Electrical single-line diagrams show the electrical distribution system including panel bus bar ratings, which are critical for determining available capacity for PV interconnection.
Use the free Solar PV Design Exam Prep sample, download the PDF, then unlock web-based timed mock exams for a full exam rehearsal.
Theory