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Installing a solar panel system on your roof comes with a total upfront cost of $20,000. If the solar panels reduce your utility bill by $2,700 per year, what is the Payback period of installing the solar panel system? Round to one decimal place. Type your response Installing a solar panel system on your roof comes with a total upfront cost of $20,000. If the solar panels reduce your utility bill by $2,700 per year, what is the Payback Period of installing the solar panel system? Round to one decimal place. Type your response