Maryland Solar Installer Certification Exam
With Actual Questions & Verified
Answers,Explained Rationales/Expert
Verified For Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary function of a photovoltaic (PV) system?
A. To store wind energy
B. To convert sunlight into electricity
C. To generate heat for water systems
D. To convert AC into DC
Answer: B
A photovoltaic system converts sunlight directly into electrical energy
using semiconductor materials in solar cells.
2. Which unit is used to measure electrical power output of a solar
panel?
A. Volts
B. Ohms
C. Watts
D. Amperes
Answer: C
Watts measure the rate of electrical power produced or consumed by
a solar PV system.
, 3. What does an inverter do in a solar PV system?
A. Stores electricity
B. Converts DC to AC electricity
C. Increases panel temperature
D. Measures sunlight intensity
Answer: B
An inverter converts direct current (DC) produced by solar panels into
alternating current (AC) used in homes.
4. Which safety equipment is essential when working on rooftops?
A. Steel-toe shoes only
B. Gloves only
C. Fall protection harness
D. Ear plugs
Answer: C
Fall protection harnesses are critical for preventing serious injury or
death during rooftop solar installation.
5. What is the purpose of grounding a solar PV system?
A. Increase voltage output
B. Improve panel efficiency
C. Protect against electrical shock and surges
D. Reduce installation cost
Answer: C
Grounding provides a safe path for electrical faults, protecting people
and equipment.
, 6. What does NEC 690 primarily regulate?
A. Plumbing systems
B. Solar photovoltaic systems
C. HVAC systems
D. Roofing materials
Answer: B
NEC 690 outlines electrical installation requirements for solar
photovoltaic systems.
7. What is a series connection in solar panels?
A. Panels connected side by side
B. Panels connected to increase current
C. Panels connected end-to-end to increase voltage
D. Panels connected to reduce resistance
Answer: C
Series connections increase voltage while keeping current the same.
8. What is a parallel connection in solar panels?
A. Increases voltage
B. Increases current
C. Decreases voltage
D. Stops power flow
Answer: B
Parallel connections increase current while maintaining voltage.
9. What is solar irradiance?
A. Heat from solar panels
, B. Amount of sunlight received per area
C. Electricity stored in batteries
D. Resistance in circuits
Answer: B
Solar irradiance is the power of sunlight received per unit area, usually
measured in W/m².
10. What tool is commonly used to measure voltage in PV
systems?
A. Clamp meter
B. Multimeter
C. Thermometer
D. Hygrometer
Answer: B
A multimeter measures voltage, current, and resistance in electrical
systems.
11. What is the purpose of a charge controller?
A. Converts AC to DC
B. Prevents battery overcharging
C. Increases panel output
D. Grounds the system
Answer: B
Charge controllers regulate battery charging to prevent damage from
overcharging.
With Actual Questions & Verified
Answers,Explained Rationales/Expert
Verified For Guaranteed Pass 2026/Latest
Update/Instant Download Pdf
1. What is the primary function of a photovoltaic (PV) system?
A. To store wind energy
B. To convert sunlight into electricity
C. To generate heat for water systems
D. To convert AC into DC
Answer: B
A photovoltaic system converts sunlight directly into electrical energy
using semiconductor materials in solar cells.
2. Which unit is used to measure electrical power output of a solar
panel?
A. Volts
B. Ohms
C. Watts
D. Amperes
Answer: C
Watts measure the rate of electrical power produced or consumed by
a solar PV system.
, 3. What does an inverter do in a solar PV system?
A. Stores electricity
B. Converts DC to AC electricity
C. Increases panel temperature
D. Measures sunlight intensity
Answer: B
An inverter converts direct current (DC) produced by solar panels into
alternating current (AC) used in homes.
4. Which safety equipment is essential when working on rooftops?
A. Steel-toe shoes only
B. Gloves only
C. Fall protection harness
D. Ear plugs
Answer: C
Fall protection harnesses are critical for preventing serious injury or
death during rooftop solar installation.
5. What is the purpose of grounding a solar PV system?
A. Increase voltage output
B. Improve panel efficiency
C. Protect against electrical shock and surges
D. Reduce installation cost
Answer: C
Grounding provides a safe path for electrical faults, protecting people
and equipment.
, 6. What does NEC 690 primarily regulate?
A. Plumbing systems
B. Solar photovoltaic systems
C. HVAC systems
D. Roofing materials
Answer: B
NEC 690 outlines electrical installation requirements for solar
photovoltaic systems.
7. What is a series connection in solar panels?
A. Panels connected side by side
B. Panels connected to increase current
C. Panels connected end-to-end to increase voltage
D. Panels connected to reduce resistance
Answer: C
Series connections increase voltage while keeping current the same.
8. What is a parallel connection in solar panels?
A. Increases voltage
B. Increases current
C. Decreases voltage
D. Stops power flow
Answer: B
Parallel connections increase current while maintaining voltage.
9. What is solar irradiance?
A. Heat from solar panels
, B. Amount of sunlight received per area
C. Electricity stored in batteries
D. Resistance in circuits
Answer: B
Solar irradiance is the power of sunlight received per unit area, usually
measured in W/m².
10. What tool is commonly used to measure voltage in PV
systems?
A. Clamp meter
B. Multimeter
C. Thermometer
D. Hygrometer
Answer: B
A multimeter measures voltage, current, and resistance in electrical
systems.
11. What is the purpose of a charge controller?
A. Converts AC to DC
B. Prevents battery overcharging
C. Increases panel output
D. Grounds the system
Answer: B
Charge controllers regulate battery charging to prevent damage from
overcharging.
