Entry Level Solar Pv Flashcards Solarsean.com

Front 1

String

Back 1

PV Source Circuit

Front 2

Between PV Source

Circuit and PV Output Circuit

Back 2

Combiner Box

Front 3

Horsepower in Watts

Back 3

746 Watts

Front 4

Megawatt in Watts

Back 4

MW = One Million Watts

Front 5

Kilowatt in Watts

Back 5

kW = 1000 Watts

Front 6

Put Volts, Amps and Watts in Equation

Back 6

W = VI or W = VA

Front 7

Units for Power

Back 7

Watts

Front 8

Units for Current

Back 8

Amps or Amperes

Front 9

I is the symbol for

Back 9

Current

Front 10

Hydraulic Analogy Voltage

Back 10

Pressure

Front 11

Hydraulic Analogy for Current

Back 11

Flow

Front 12

Units for Resistance

Back 12

Ohms

Front 13

Put Resistance, Volts and Amps in Equation

Back 13

V = IR or Volts = Amps x Resistance

Front 14

Solve for V if you have W and I

Back 14

V = W/I

Front 15

Solve for I if you have V and W

Back 15

I = W/V

Front 16

12 250W modules is how many kilowatts?

Back 16

3kW

Front 17

A 10W light is on for 2 days, how much energy?

Back 17

480Wh or 0.48kWh

Front 18

Inverters detect ac or dc ground faults?

Back 18

dc

Front 19

Current carrying ability of conductor (wire)

Back 19

Ampacity

Front 20

Voltage in how place will be

Back 20

Lower

Front 21

Relationship between current and irradiance

Back 21

directly proportional

Front 22

Will a string too long be a hot or cold problem?

Back 22

cold

Front 23

Will a string too short be a hot or cold problem?

Back 23

hot

Front 24

Problem with different orientations on a PV source circuit

Back 24

Current of string is whatever worst orientation is

Front 25

Bypass diodes mitigate problems with

Back 25

Shading

Front 26

-0.34%/C x -10C =

Back 26

3.4% increase in voltage

Front 27

A temp corrected 10%

increase in voltage from 40Voc is

Back 27

44Voc at cold temperature

Front 28

BIPV is

Back 28

Building Integrated Photovoltaics

Front 29

Cold module Temp is 40C, Inverter max input is 110V, what is max PV in series?

Back 29

2 in series

Front 30

STC temperature is

Back 30

25C

Front 31

Difference from -10C and STC is

Back 31

Delta T is -35C

Front 32

MPPT

Back 32

Maximum Power Point Tracking optimizes power from array

Front 33

Concentrated PV works on a cloudy day T or F

Back 33

False, only with direct sunlight

Front 34

Concentrated PV works with this kind of tracker

Back 34

2-axis

Front 35

Use fall protection at this height

Back 35

6-feet

Front 36

Parallel connections increase

Back 36

Current

Front 37

Parallel PV connections are done at

Back 37

Combiner box

Front 38

Series PV connections increase

Back 38

Voltage

Front 39

Optimal tilt for winter

Back 39

Latitude +15 degrees

Front 40

Optimal tilt for summer

Back 40

Latitude -15 degrees

Front 41

Good tilt for annual

production in most of USA

Back 41

30 degrees or latitude

Front 42

Other names for

transformerless inverter

Back 42

ungrounded, non-isolated or TL

Front 43

Bypass diode location

Back 43

PV module junction box

Front 44

High elevation can

increase current because of

Back 44

decreased atmosphere

Front 45

How much 10% efficient PV can you fit on 10 square meters?

Back 45

1000W or 1 kW

Front 46

Irradiance at peak sun

Back 46

1000W per square meter

Front 47

Units for irradiance

Back 47

W per square meter or power per unit area

Front 48

5-peak sun hours per day is a measurement of

Back 48

Insolation or irradiation

Front 49

Which is the smallest conductor? 10AWG, 8AWG, or 3/0AWG

Back 49

10AWG

Front 50

Simplest type of PV

system

Back 50

Direct or direct coupled (PV and a load)

Front 51

Sun path charts differ based on

Back 51

Latitude

Front 52

Longest shadow is on what day of year?

Back 52

Winter solstice (usually about December 21)