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Solar Panel Technical Report Part 2

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Solar Panel Technical Report Part 2

Questions to Explore
In this worksheet, you will explore the following questions:

● What is the expected amount of electricity that would be produced by adopting a solar panel system that covers the entire roof based on the average monthly sunlight?
● What is the current electricity usage of the building and its cost?
● How long will it take to pay back the cost of buying the solar panel system in years?
● Is there a cost savings over 20 years for leasing the solar panel system?

As you address the questions in the worksheet, be sure to show all of your mathematical calculations.

What is the expected amount of electricity that would be produced by adopting a solar panel system that covers the entire roof based on the average monthly sunlight? (1kW = 1000W, and 1 hour of sunlight produces 200 watts per panel)

1. What is the average number of hours of sunlight expected per month?

2. What is the total amount of energy that is produced by the entire solar panel system per month based on the average monthly sunlight?

3. What is the estimated total amount of kWh produced by the entire solar panel system on this building per year, based on the average monthly sunlight for the area?

What is the current electricity usage of the building and its cost?
1. Based on the local average cost of electricity, about how much is the annual electricity cost for the university's building?

How long will it take to pay back the cost of buying the solar panel system in years?
1. What is the total cost of the system including cost of solar panels and installation? You should also consider any government incentives. You can assume there will not be any required maintenance during the first 20 years.

2. How much money will the solar panels save the university per year? How long would it take to pay back the cost of purchasing the entire solar panel system?

Is there a cost savings over 20 years for leasing the solar panel system?
1. What is the cost to rent the entire solar panel system?

2. How does the cost of renting the panels compare with costs for purchasing the solar panel system over 20 years? (Remember, leasing the solar panel system means the university does not have to pay for defective panels.)

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Step-by step solutions and calculations are given in the file.

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What is the expected amount of electricity that would be produced by adopting a solar panel system that covers the entire roof based on the average monthly sunlight? (1kW = 1000W, and 1 hour of sunlight produces 200 watts per panel)

1. What is the average number of hours of sunlight expected per month?

To find the average, add all of the expected hours of sunlight by month, then divide by 12.

Average number of hours of sunlight expected per month
=(163 + 168 + 214 + 227 + 267 + 287 + 301 + 277 + 237 + 206 + 143 + 142)/12
= 219.3 hours

2. What is the total amount of energy that is produced by the entire solar panel system per month based on the average monthly sunlight?

Amount of energy produced by 1 solar panel per month
= 200 Watts * 219.3 hours
= 43,860 Watt-hours

Number of solar panels that can fit on the roof = 1150 (from Solar Panel Technical Report Part I)
Total amount of energy produced by the entire solar panel system per month
= 43,860 Watt-hours/panel * 1150 panels
= 50,439,000 Watt-hours
= 50,439 kWh

3. What is ...

Solution provided by:
J Pye, MSc
Education
  • MSc, California State Polytechnic University, Pomona
  • MBA, University of California, Riverside
  • BSc, California State Polytechnic University, Pomona
  • BSc, California State Polytechnic University, Pomona
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