Question: In this problem, we consider replacing an existing electrical water heater with an array of solar panels. The net installed investment cost of the panels

In this problem, we consider replacing an existing electrical water heater with an array of solar panels. The net installed investment cost of the panels is $1,400 ($2,000 less a 30% tax credit from the government). Based on an energy audit, the existing water heater uses 200 kilowatt hours (kWh) of electricity per month, so at $0.12 per kWh, the cost of operating the water heater is $24 per month. Assuming the solar panels can save the entire cost of heating water with electricity, answer the following questions.
a. What is the simple for the solar panels?
b. What is the IRR of this investment if the solar panels have a life of 10 years?

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a The simple payback period is 1400 24 per month 58 mont... View full answer

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