NABCEP PV ASSOCIATE EXAM
500W/m^2 for 4 hours is - ANS-2kWh
A 12V mild is left on for 13 hours at 1.5A with a 12V battery, what number of Ah are used? -
ANS-19.5 Ah
1.5A * 13hrs
A 12V mild is left on for 13 hours at 1.5A with a 12V battery. How an awful lot strength is used? -
ANS-0.234 kWh
12V * 1.5A * 13hr = 234 Wh
A 4kW PV device with 15% losses in a vicinity with four.5 sun hours per day, what would be the
annual output? - ANS-5585kWh.
4kW * .Eighty five * four.5 sun hours * three hundred and sixty five days
A PV system that would produce 7kWac underneath STC situations, which isn't always clipping
electricity is mounted in a area with a median of 6 PSH would produce how much electricity in
365 days? - ANS-15,330 kWh
7*6*365
A system that sits on a flat/low slope rooftop and has no penetrations is called a:
A) Flush hooked up gadget
B) Flashed device
C) BIPV system
D) Ballasted gadget - ANS-Ballasted structures are commonplace flat low slope roof structures
that are not penetrating the roof. A ballast is something this is surprisingly heavy keeps the PV
from blowing away
AC coupled sustem - ANS-A machine where interactive inverters (grid-tied) are used with
battery inverters to charge batteries
AC disconnect - ANS-A switch that disconnects (turns off) ac circuit conductors. A circuit
breaker is a disconnect and also an over cutting-edge safety device
AC module - ANS-A module with AC output indexed for such use. Can be a micro-inverter
hooked up on a module if it turned into examined together
According to ohms regulation and voltage drop, the connection between voltage drop and
cutting-edge is - ANS-Proportional. Ohms regulation: V = I*R
, More modern-day makes greater voltage drop. This is a purpose why we want a larger wire with
extra present day, so the wire resistance is less with a larger cord and there can be much less
voltage drop.
An array in a warm and dry vicinity isn't generating as predicted in summer season. Which of
the following is NOT a probable hassle:
a) Decreased ac cord size and voltage loss
b) String length too quick
C) String size too long
D) Soiling - ANS-C) String length too brief. When it's miles hot, voltage can be low. Too lengthy
of a string would be a problem when it's far too cold no longer too hot.
An off-grid installation has a 1HP pump this is on 10% of the time and a 20W light this is on one
hundred% of the time. What is the month-to-month power use? - ANS-68KWh
1HP = 746W
746W * 0.1 * 24hours * 30days = 53712Wh
20W * 24hrs * 30days = 14400Wh
14400 + 53712 = 68112Wh
68kWh
AWG - ANS-American Wire Gauge
Battery - ANS-Stores electricity via chemical reactions. Many stand-alone PV structures use
lead acid batteries
Battery inverter - ANS-An inverter that receives voltage from a battery and produces modern
and power, as it is wanted. A battery inverter is installed to a battery (often via price controller)
and no longer to the PV
Battery inverter enter circuit - ANS-The conductors among the battery and the battery inverter,
sized according to energy of the inverter and the bottom battery voltage
Best sealant for residential rooftop - ANS-Polyurethane and silicone are the excellent. Silicone
is a sealant, silicon is what sun cells are made from
Best tilt for annual manufacturing in maximum of the united states? - ANS-30 levels
Blocking Diode - ANS-Prevents reverse contemporary
Branch circuit - ANS-A circuit coming from a circuit breaker off of a load middle. Inverters have
committed department circuits
Busbar - ANS-A piece of steel wherein exclusive circuits are connected in parallel Usually in
which breakers or wires are connected
500W/m^2 for 4 hours is - ANS-2kWh
A 12V mild is left on for 13 hours at 1.5A with a 12V battery, what number of Ah are used? -
ANS-19.5 Ah
1.5A * 13hrs
A 12V mild is left on for 13 hours at 1.5A with a 12V battery. How an awful lot strength is used? -
ANS-0.234 kWh
12V * 1.5A * 13hr = 234 Wh
A 4kW PV device with 15% losses in a vicinity with four.5 sun hours per day, what would be the
annual output? - ANS-5585kWh.
4kW * .Eighty five * four.5 sun hours * three hundred and sixty five days
A PV system that would produce 7kWac underneath STC situations, which isn't always clipping
electricity is mounted in a area with a median of 6 PSH would produce how much electricity in
365 days? - ANS-15,330 kWh
7*6*365
A system that sits on a flat/low slope rooftop and has no penetrations is called a:
A) Flush hooked up gadget
B) Flashed device
C) BIPV system
D) Ballasted gadget - ANS-Ballasted structures are commonplace flat low slope roof structures
that are not penetrating the roof. A ballast is something this is surprisingly heavy keeps the PV
from blowing away
AC coupled sustem - ANS-A machine where interactive inverters (grid-tied) are used with
battery inverters to charge batteries
AC disconnect - ANS-A switch that disconnects (turns off) ac circuit conductors. A circuit
breaker is a disconnect and also an over cutting-edge safety device
AC module - ANS-A module with AC output indexed for such use. Can be a micro-inverter
hooked up on a module if it turned into examined together
According to ohms regulation and voltage drop, the connection between voltage drop and
cutting-edge is - ANS-Proportional. Ohms regulation: V = I*R
, More modern-day makes greater voltage drop. This is a purpose why we want a larger wire with
extra present day, so the wire resistance is less with a larger cord and there can be much less
voltage drop.
An array in a warm and dry vicinity isn't generating as predicted in summer season. Which of
the following is NOT a probable hassle:
a) Decreased ac cord size and voltage loss
b) String length too quick
C) String size too long
D) Soiling - ANS-C) String length too brief. When it's miles hot, voltage can be low. Too lengthy
of a string would be a problem when it's far too cold no longer too hot.
An off-grid installation has a 1HP pump this is on 10% of the time and a 20W light this is on one
hundred% of the time. What is the month-to-month power use? - ANS-68KWh
1HP = 746W
746W * 0.1 * 24hours * 30days = 53712Wh
20W * 24hrs * 30days = 14400Wh
14400 + 53712 = 68112Wh
68kWh
AWG - ANS-American Wire Gauge
Battery - ANS-Stores electricity via chemical reactions. Many stand-alone PV structures use
lead acid batteries
Battery inverter - ANS-An inverter that receives voltage from a battery and produces modern
and power, as it is wanted. A battery inverter is installed to a battery (often via price controller)
and no longer to the PV
Battery inverter enter circuit - ANS-The conductors among the battery and the battery inverter,
sized according to energy of the inverter and the bottom battery voltage
Best sealant for residential rooftop - ANS-Polyurethane and silicone are the excellent. Silicone
is a sealant, silicon is what sun cells are made from
Best tilt for annual manufacturing in maximum of the united states? - ANS-30 levels
Blocking Diode - ANS-Prevents reverse contemporary
Branch circuit - ANS-A circuit coming from a circuit breaker off of a load middle. Inverters have
committed department circuits
Busbar - ANS-A piece of steel wherein exclusive circuits are connected in parallel Usually in
which breakers or wires are connected
