TEXAS RENEWABLE ENERGY TECHNICIAN
CERTIFICATION EXAM ACTUAL 2026
VERIFIED QUESTIONS WITH ANSWERS
COMPREHENSIVE & RATIONALE|INSTANT
DOWNLOAD
1. A Texas renewable energy technician is preparing to install a grid-
connected photovoltaic (PV) system. Before any wiring begins,
what is the primary purpose of conducting a comprehensive site
assessment?
A. To determine the paint color of the building
B. To identify environmental, structural, electrical, and shading
conditions affecting system performance
C. To estimate landscaping costs
D. To determine future property taxes
Answer: B
Rationale: A thorough site assessment identifies roof orientation,
structural integrity, available solar resource, electrical service capacity,
shading, local code requirements, and safety hazards. These factors
determine system feasibility, efficiency, equipment selection, and long-
term reliability.
2. Which photovoltaic material currently dominates residential solar
installations because of its high efficiency and durability?
A. Amorphous silicon
B. Cadmium telluride
C. Monocrystalline silicon
1
,D. Organic photovoltaic cells
Answer: C
Rationale: Monocrystalline silicon modules generally offer efficiencies
exceeding 20%, excellent longevity, and strong performance under
varying environmental conditions, making them the preferred choice for
residential systems.
3. During a maintenance inspection, an inverter repeatedly
disconnects from the utility grid during periods of excessive
voltage. What is the MOST likely explanation?
A. Proper anti-islanding protection responding to abnormal grid
conditions
B. Battery overcharging
C. Dirty PV modules
D. Low irradiance
Answer: A
Rationale: Modern grid-tied inverters continuously monitor utility
voltage and frequency. If grid voltage exceeds acceptable limits, anti-
islanding protection disconnects the inverter to protect utility workers
and equipment.
4. Which renewable energy technology directly converts sunlight into
electricity without moving mechanical components?
A. Concentrated solar thermal
B. Wind turbine
C. Photovoltaic cell
2
,D. Hydroelectric generator
Answer: C
Rationale: Photovoltaic cells convert photons directly into electrical
energy using semiconductor materials without requiring turbines or
mechanical motion.
5. What primarily determines the output voltage of an individual
silicon solar cell?
A. Cell size
B. Semiconductor band gap
C. Wire diameter
D. Mounting angle
Answer: B
Rationale: The semiconductor band gap determines the open-circuit
voltage of a solar cell. Silicon cells typically produce approximately 0.5
to 0.6 volts under standard test conditions.
6. When wiring PV modules in series, what electrical characteristic
increases?
A. Current
B. Voltage
C. Power factor
D. Resistance
Answer: B
3
, Rationale: Series connections add module voltages while maintaining
approximately the same current. Parallel connections increase current
instead.
7. A renewable energy technician discovers that one module in a
series string is heavily shaded. What effect is MOST likely?
A. Increased string current
B. Reduced output of the entire string
C. Higher inverter efficiency
D. Lower module temperature
Answer: B
Rationale: Because current in a series circuit is limited by the weakest
module, shading on one panel reduces current and decreases total string
power.
8. Which instrument is MOST appropriate for verifying solar
irradiance during system commissioning?
A. Hygrometer
B. Pyranometer
C. Manometer
D. Tachometer
Answer: B
Rationale: A pyranometer measures solar irradiance in watts per
square meter and is commonly used during system testing and
performance verification.
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CERTIFICATION EXAM ACTUAL 2026
VERIFIED QUESTIONS WITH ANSWERS
COMPREHENSIVE & RATIONALE|INSTANT
DOWNLOAD
1. A Texas renewable energy technician is preparing to install a grid-
connected photovoltaic (PV) system. Before any wiring begins,
what is the primary purpose of conducting a comprehensive site
assessment?
A. To determine the paint color of the building
B. To identify environmental, structural, electrical, and shading
conditions affecting system performance
C. To estimate landscaping costs
D. To determine future property taxes
Answer: B
Rationale: A thorough site assessment identifies roof orientation,
structural integrity, available solar resource, electrical service capacity,
shading, local code requirements, and safety hazards. These factors
determine system feasibility, efficiency, equipment selection, and long-
term reliability.
2. Which photovoltaic material currently dominates residential solar
installations because of its high efficiency and durability?
A. Amorphous silicon
B. Cadmium telluride
C. Monocrystalline silicon
1
,D. Organic photovoltaic cells
Answer: C
Rationale: Monocrystalline silicon modules generally offer efficiencies
exceeding 20%, excellent longevity, and strong performance under
varying environmental conditions, making them the preferred choice for
residential systems.
3. During a maintenance inspection, an inverter repeatedly
disconnects from the utility grid during periods of excessive
voltage. What is the MOST likely explanation?
A. Proper anti-islanding protection responding to abnormal grid
conditions
B. Battery overcharging
C. Dirty PV modules
D. Low irradiance
Answer: A
Rationale: Modern grid-tied inverters continuously monitor utility
voltage and frequency. If grid voltage exceeds acceptable limits, anti-
islanding protection disconnects the inverter to protect utility workers
and equipment.
4. Which renewable energy technology directly converts sunlight into
electricity without moving mechanical components?
A. Concentrated solar thermal
B. Wind turbine
C. Photovoltaic cell
2
,D. Hydroelectric generator
Answer: C
Rationale: Photovoltaic cells convert photons directly into electrical
energy using semiconductor materials without requiring turbines or
mechanical motion.
5. What primarily determines the output voltage of an individual
silicon solar cell?
A. Cell size
B. Semiconductor band gap
C. Wire diameter
D. Mounting angle
Answer: B
Rationale: The semiconductor band gap determines the open-circuit
voltage of a solar cell. Silicon cells typically produce approximately 0.5
to 0.6 volts under standard test conditions.
6. When wiring PV modules in series, what electrical characteristic
increases?
A. Current
B. Voltage
C. Power factor
D. Resistance
Answer: B
3
, Rationale: Series connections add module voltages while maintaining
approximately the same current. Parallel connections increase current
instead.
7. A renewable energy technician discovers that one module in a
series string is heavily shaded. What effect is MOST likely?
A. Increased string current
B. Reduced output of the entire string
C. Higher inverter efficiency
D. Lower module temperature
Answer: B
Rationale: Because current in a series circuit is limited by the weakest
module, shading on one panel reduces current and decreases total string
power.
8. Which instrument is MOST appropriate for verifying solar
irradiance during system commissioning?
A. Hygrometer
B. Pyranometer
C. Manometer
D. Tachometer
Answer: B
Rationale: A pyranometer measures solar irradiance in watts per
square meter and is commonly used during system testing and
performance verification.
4
