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The PV2 exam has 100 questions and runs 2 hours.
These 10 free PV2 questions are organized by exam domain, so you can see how each part of the Photovoltaic Installer/Designer (PV2) blueprint is tested. Reveal the answer and explanation under each question.
A U.S. business owns a rooftop PV system and consumes its output on site. It sells all renewable energy certificates associated with that generation and acquires no replacement certificates. Which statement can it substantiate without claiming renewable attributes it has sold?
Correct answer: B - Our on-site PV system generates electricity; its renewable attributes are sold separately.
At a ground-level staging area on a hot afternoon, an installer becomes unsteady, speaks incoherently, and cannot answer simple questions. He is still sweating heavily. What should the crew do immediately?
Correct answer: A - Activate emergency services and begin rapid cooling while awaiting help.
A homeowner wants refrigeration and lighting available during utility outages, including at night. The existing grid-following string inverter must remain in service and has no approved battery connection. Which retrofit architecture meets these requirements?
Correct answer: A - Retain the PV inverter and add compatible, grid-forming AC-coupled battery storage with utility isolation.
A SunEye survey reports annual solar access of 82%, a tilt and orientation factor of 96%, and a total solar resource fraction (TSRF) of 79%. What does the TSRF quantify?
Correct answer: B - Solar resource available relative to the site's optimal, unshaded orientation
Roof geometry leaves an east-facing string of 10 modules and a west-facing string of 14 modules of the same type. Each string is within the candidate inverters' temperature-corrected voltage and current limits. To let these unequal strings operate at their respective maximum-power points, the inverter specification must include which feature?
Correct answer: D - Independent MPPT channels, with one assigned to each string
An 8 kW DC array is paired, within the manufacturer's limits, with a 6 kW AC inverter. On clear days, output forms a flat 6 kW plateau around noon. DC voltage and current remain within ratings, inverter temperature is normal, and there are no faults or utility curtailment commands. Which service recommendation is justified by this pattern?
Correct answer: C - Continue normal operation; the plateau is expected inverter clipping.
A module has an open-circuit voltage of 50.0 V at 25°C and a Voc temperature coefficient of -0.28%/°C. The minimum design cell temperature is -15°C; at the hottest design condition, module Vmp is 34.0 V. The inverter allows 600 V maximum DC input and requires at least 250 V for MPPT operation. All other equipment limits are satisfied. Which inclusive range of series-connected modules meets both voltage constraints?
Correct answer: C - 8 through 10 modules
A panel has a 200 A busbar and a 175 A main breaker. A single PV source will connect at the opposite end of the bus from the main under the 2017 NEC 120% load-side busbar method. There are no other generation sources or feed-through connections, and all other connection requirements are satisfied. Of the following continuous inverter AC output ratings, which is the largest permitted without changing the busbar or main breaker?
Correct answer: B - 48 A
Inspection finds that a roof attachment's lag screw misses the rafter and engages only the sheathing. The approved mounting detail relies on rafter embedment for uplift resistance, although the flashing is watertight. Which repair restores the intended structural load path?
Correct answer: D - Refasten into the rafter per the approved detail and restore the roof seal.
Two identical, unshaded strings feed separate, identically configured MPPT channels. During a qualified technician's comparison under stable irradiance and similar cell temperatures, the strings measure 510 V and 511 V open circuit. Under load, one delivers much less current. Its only pronounced thermal anomaly is at a field-crimped connector; adjacent cable and comparable connectors remain cool. Which fault best explains this combination?
Correct answer: C - High contact resistance at the connector
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