Power Basics

• Point Zero Energy
• May 7th, 2020
• No Comments

 

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#1. Please choose the most accurate description of what an amp is

The amount of energy storage in a battery

The rate of flow of electrons through a wire

The amount of power generated by a solar panel

#2. Aproximatly how much energy would a 100 watt solar panel produce in 5 hours of sun

100 watts

500 watts

500 watt-hours

100 amp-hours

#3. Approximatly how much energy does a 100ah 12v battery store

1200 watt hours

1200 watts

100 amp hours

#4. Approximatly how many amps would you draw from a 12v battery to produce 120 watts of power

10 amps

120 amps

12 amps

50 amps

#5. What is the difference between power and energy

There is no difference

Solar panels generate energy, and batteries store power

Power is an instantanous measure of the rate of energy being used or stored, where energy is the accumulated power over time

#6. What is a correct unit for the stored energy in a battery

watts

amp hours

amps

watt hours

#7. What are the correct units for Energy generated by a solar panel in one hour

amps

watts

volts

watt hours

amp hours

#8. Power(watts) X time(hours) = Energy (watt-hours)

True

False

Use the following label for the next 3 questions

#9. What is the maximum number of solar panels you can connect in a series for a charge controller with a maximum 100V and 30A

There is no limit

2

4

5

#10. What is the maximum number of solar panels you can connect in paralell for a charge controller with a maximum 100V and 30A

There is no limit

2

3

4

#11. What is Imp, ISC, and Voc if you connect three panels in series parrelled with another 3 panels in series (two series of 3 panels paralled together for a total of 6 panels)?

Imp: 1440 watts; Isc: 17.32A; Voc: 111.3V

Imp: 1440 watts; Isc 25.98A; Voc: 74.2V

Imp: 480 watts: Isc 8.66A; Voc: 225.6V

Imp: 240 watts: Isc: 8.66A; Voc: 2.71V

#12. Modified sine wave is a form of which?

DC Power

Ac Power

Non of the above

#13. Which will charge a battery faster (assuming all else is equal, and the panels are correctly rated)

A 100 watt panel that is 21% efficient

A 110 watt panels that is 15% efficient

A 120 watt panel that is 10% efficient

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