Question 1

The duty cycle is the amount of time that a specific electrical load operates.

Accepted Answer

The duty cycle is defined as the amount of time that a specific electrical load operates in a given period, usually expressed as a percentage.

Question 2

Sizing the wire from the inverter to the AC loadcenter in a grid-tie PV system is sized the same way as sizing the wire run from a(n) ___________________ to an AC loadcenter in a stand-alone PV system.

Accepted Answer

inverter

Question 3

In a standard charge controller, all of the system components have the same voltage.

Accepted Answer

In a standard charge controller, all of the system components, including the battery, solar panels, and load, are maintained at the same voltage level to ensure efficient charging and discharge of the battery.

Question 4

Explain how output power rating is used to determine the number of inverters needed in a grid-tie PV system.

Accepted Answer

The answer of Explain how output power rating is used...

Question 5

Load ____________________ is the process of changing large electrical loads in a building to another form of power such as natural gas or propane.

Accepted Answer

The answer of Load ____________________ is the process of changing...

Question 6

Explain the Energy Star label, where it originated, and what it means.

Accepted Answer

The answer of Explain the Energy Star label, where it...

Question 7

Sizing a(n) ____________________ PV system is simpler than sizing a stand-alone PV system primarily because there are not as many system components to determine.

Accepted Answer

The answer of Sizing a(n) ____________________ PV system is simpler...

Question 8

Where do you start when sizing a PV system?

Accepted Answer

The answer of Where do you start when sizing a...

Question 9

What is the overall process for determining inverter size for a stand-alone PV system?

Accepted Answer

The answer of What is the overall process for determining...

Question 10

The use of an MPPT and/or step down charge controller in a stand-alone PV system requires the array to be sized a little differently than when using a(n) ____________________ charge controller.

Accepted Answer

The answer of The use of an MPPT and/or step...

Question 11

For the lowest temperature termination rating, assume that all terminations are rated ___________________°C unless you know for sure that there are 60°C or 90°C terminations in the circuit.

Accepted Answer

The answer of For the lowest temperature termination rating, assume...

Question 12

Why should a grid-tie PV system not be sized larger than needed for the building's average annual electrical load?

Accepted Answer

The answer of Why should a grid-tie PV system not...

Question 13

The ____________________ electric energy usage can be found on a building's electric utility bill, or the building owner can contact the local electric utility.

Accepted Answer

The answer of The ____________________ electric energy usage can be...

Question 14

A(n) ____________________ PV system needs to be sized so that it can supply the total electrical load of the building it serves.

Accepted Answer

The answer of A(n) ____________________ PV system needs to be...

Question 15

The rule of thumb often used to calculate the surge load is to simply multiply the required watts of a load by ____________________.

Accepted Answer

The answer of The rule of thumb often used to...

Question 16

A phantom load is a load type that draws a large amount of current, even when the load is "OFF".

Accepted Answer

A phantom load is a load that draws a small amount of current even when the device is turned off or in standby mode, not a large amount of current.

Question 17

If the building's loads change significantly over the course of a year, it is acceptable to use the month with lowest insolation as the design month.

Accepted Answer

Insolation refers to the amount of solar energy that reaches a surface area. The design month for a building's loads should be based on a month that represents the peak load conditions, not the lowest insolation month.

Question 18

What is the one major difference between a bimodal PV system and a stand-alone PV system?

Accepted Answer

The answer of What is the one major difference between...

Question 19

A common assumption in most stand-alone PV system installations is that the wiring from module to module and from the array modules to the combiner box is the same size as the wire leads that were installed on the PV modules by the manufacturer.

Accepted Answer

The assumption is that the wiring from module to module and from the array modules to the combiner box is the same size as the wire leads that were installed on the PV modules by the manufacturer.

Question 20

The system loss ___________________ factor takes into account the types of losses that occur when converting the PV array produced DC electricity to AC electricity.

Accepted Answer

The answer of The system loss ___________________ factor takes into...

Quiz 10: Sizing Pv Systems