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Homeowner’s 4.26 kW rooftop solar case study: costs, rebates and real-world payback
Summary
A Village resident presented a one-year case study of a 4.26 kW rooftop system installed in August 2024: installed cost $21,005.13, federal tax credit $6,002.74, Focus on Energy rebate $600, net cost $14,006.39, and first-year savings of $682.55; payback estimates ranged from about 10–21 years depending on assumptions and future electric rates.
A Village resident who installed a 4.26 kilowatt rooftop solar system last August told the Village of Cross Plains Sustainability Committee about the costs, incentives and year-one performance of the system.
The installer’s price for the job was $21,005.13, the presenter said, and he received a federal nonrefundable tax credit of $6,002.74 and a Focus on Energy rebate of $600, reducing his net outlay to $14,006.39. Using a sample Madison Gas & Electric bill for the period 09/10/2025–10/09/2025, the presenter said the system produced 275 kilowatt-hours and produced $682.55 in first-year bill savings.
“Because of the rebates and tax credit, my total cost in dollars was 14,006.39,” the presenter said. “In a…
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