NABCEP PV ASSOCIATE RETAKE
WITH ALL VERIFIED QUESTIONS AND
CORRECT ANSWERS 2026/2027 EXAM LATEST
PRACTICE TEST
Bypass diodes are located in the
A) Combiner box
B) Inverter
C) Wiring harness
D) PV Module - ANSWER-Bypass diodes are in PV module junction box. Diverts
current around a group of cells if one is shaded. Usually 3 diodes/PV module
PV array at higher elevation would tend to produce more - ANSWER-Current.
Higher elevation, less atmosphere, more irradiance, more current. High elevation
can also be cooler meaning more voltage from cold temps.
How much 14% efficient PV fits on 25 Square Meters
A) 3000W
B) 4.5kW
C) 4000W
D) 3.5kW - ANSWER-D) 3.5kW. 14% efficient = 0.14*1000W/M^2 = 140
W/m^2
1 40 * 25 = 3500W = 3.5kW
Page 1 of 35
,Which is the smallest conductor? - ANSWER-18 AWG
1 8 AWG, 10 AWG, 0 AWG, 3/0 AWG
What is the simplest type of PV system - ANSWER-Direct coupled is the simplest
with just PV and a load that only works when the sun is out
Sun path charts differ based on - ANSWER-Latitude
Series connections increase - ANSWER-Voltage. Parallel increases current
The longest shadow at 2PM would be on - ANSWER-The winter solstice (12/21)
What is the ground mount advantage over a rooftop system? - ANSWER-Ground
mount is cooler hat rooftop because of better airflow, meaning higher voltage
Which test conditions have higher voltage?
STC
PTC
CEC
NOCT - ANSWER-STC is higher voltage
Best tilt for annual production in most of the USA? - ANSWER-30 degrees
A 12V light is left on for 13 hours at 1.5A with a 12V battery. How much energy
is used? - ANSWER- 0 .234 kWh
Page 2 of 35
,1 2V * 1.5A * 13hr = 234 Wh
A 12V light is left on for 13 hours at 1.5A with a 12V battery, how many Ah are
used? - ANSWER-19.5 Ah
1 .5A * 13hrs
Electrical safety is best studied where? - ANSWER-OSHA website
The interconnection of a PV system is approved by? - ANSWER-The utility
Grounding (bonding) of functionally grounded PV system on a roof should be
done to - ANSWER- Racking and frames should be grounded on every PV
system. Even ungrounded systems need equipment grounding
Lowest grid voltage:
A) Transmission
B) Distribution
C) Service equipment
D) Generation - ANSWER-Service has the lowest voltage. Service voltage is the
voltage at the building where the electricity is served
An off-grid installation has a 1HP pump that is on 10% of the time and a 20W
light that is on 100% of the time. What is the monthly energy use? - ANSWER-
68KWh
Page 3 of 35
, 1 HP = 746W
7 46W * 0.1 * 24hours * 30days = 53712Wh
2 0W * 24hrs * 30days = 14400Wh
1 4400 + 53712 = 68112Wh
6 8kWh
What kind of ground faults do most inverters detect? - ANSWER-DC
Inverters detect dc ground faults. AC ground faults are detected on the AC side
of the inverter at the distribution paned (MSP, load center). Most inverters are
not connected to high or medium voltage. Medium voltage is thousands of volts,
large utility scale inverters are connected to medium voltage via a transformer
Current carrying ability of a conductor (wire) is called - ANSWER-Ampacity
According to ohms law and voltage drop, the relationship between voltage drop
and current is - ANSWER-Proportional. Ohms law: V = I*R
More current makes more voltage drop. This is a reason why we need a larger
wire with more current, so the wire resistance is less with a larger wire and there
will be less voltage drop.
An array in a hot and dry place is not producing as expected in summer time.
Which of the following is NOT a likely problem:
a) Decreased ac wire size and voltage loss
b) String size too short
Page 4 of 35
WITH ALL VERIFIED QUESTIONS AND
CORRECT ANSWERS 2026/2027 EXAM LATEST
PRACTICE TEST
Bypass diodes are located in the
A) Combiner box
B) Inverter
C) Wiring harness
D) PV Module - ANSWER-Bypass diodes are in PV module junction box. Diverts
current around a group of cells if one is shaded. Usually 3 diodes/PV module
PV array at higher elevation would tend to produce more - ANSWER-Current.
Higher elevation, less atmosphere, more irradiance, more current. High elevation
can also be cooler meaning more voltage from cold temps.
How much 14% efficient PV fits on 25 Square Meters
A) 3000W
B) 4.5kW
C) 4000W
D) 3.5kW - ANSWER-D) 3.5kW. 14% efficient = 0.14*1000W/M^2 = 140
W/m^2
1 40 * 25 = 3500W = 3.5kW
Page 1 of 35
,Which is the smallest conductor? - ANSWER-18 AWG
1 8 AWG, 10 AWG, 0 AWG, 3/0 AWG
What is the simplest type of PV system - ANSWER-Direct coupled is the simplest
with just PV and a load that only works when the sun is out
Sun path charts differ based on - ANSWER-Latitude
Series connections increase - ANSWER-Voltage. Parallel increases current
The longest shadow at 2PM would be on - ANSWER-The winter solstice (12/21)
What is the ground mount advantage over a rooftop system? - ANSWER-Ground
mount is cooler hat rooftop because of better airflow, meaning higher voltage
Which test conditions have higher voltage?
STC
PTC
CEC
NOCT - ANSWER-STC is higher voltage
Best tilt for annual production in most of the USA? - ANSWER-30 degrees
A 12V light is left on for 13 hours at 1.5A with a 12V battery. How much energy
is used? - ANSWER- 0 .234 kWh
Page 2 of 35
,1 2V * 1.5A * 13hr = 234 Wh
A 12V light is left on for 13 hours at 1.5A with a 12V battery, how many Ah are
used? - ANSWER-19.5 Ah
1 .5A * 13hrs
Electrical safety is best studied where? - ANSWER-OSHA website
The interconnection of a PV system is approved by? - ANSWER-The utility
Grounding (bonding) of functionally grounded PV system on a roof should be
done to - ANSWER- Racking and frames should be grounded on every PV
system. Even ungrounded systems need equipment grounding
Lowest grid voltage:
A) Transmission
B) Distribution
C) Service equipment
D) Generation - ANSWER-Service has the lowest voltage. Service voltage is the
voltage at the building where the electricity is served
An off-grid installation has a 1HP pump that is on 10% of the time and a 20W
light that is on 100% of the time. What is the monthly energy use? - ANSWER-
68KWh
Page 3 of 35
, 1 HP = 746W
7 46W * 0.1 * 24hours * 30days = 53712Wh
2 0W * 24hrs * 30days = 14400Wh
1 4400 + 53712 = 68112Wh
6 8kWh
What kind of ground faults do most inverters detect? - ANSWER-DC
Inverters detect dc ground faults. AC ground faults are detected on the AC side
of the inverter at the distribution paned (MSP, load center). Most inverters are
not connected to high or medium voltage. Medium voltage is thousands of volts,
large utility scale inverters are connected to medium voltage via a transformer
Current carrying ability of a conductor (wire) is called - ANSWER-Ampacity
According to ohms law and voltage drop, the relationship between voltage drop
and current is - ANSWER-Proportional. Ohms law: V = I*R
More current makes more voltage drop. This is a reason why we need a larger
wire with more current, so the wire resistance is less with a larger wire and there
will be less voltage drop.
An array in a hot and dry place is not producing as expected in summer time.
Which of the following is NOT a likely problem:
a) Decreased ac wire size and voltage loss
b) String size too short
Page 4 of 35
