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Thin film solar is light weight at 7–10 ounces per square foot. Thin film solar panels last 10–20 years [23] but have a quicker ROI than traditional solar panels, the metal roofs last 40–70 years before replacement compared to 12–20 years for an asphalt shingle roof. [24] [25]
There are many factors to consider when deciding whether switching to solar panels is worth the cost. Weigh these pros and cons to decide if they're right for you.
The typical cost factors for solar power include the costs of the modules, the frame to hold them, wiring, inverters, labour cost, any land that might be required, the grid connection, maintenance and the solar insolation that location will receive. Photovoltaic systems use no fuel, and modules typically last 25 to 40 years. [79]
Solar panels are usually guaranteed for 25 years (but inverters tend to fail sooner), [160] [161] with little maintenance or intervention after their initial set-up, so after the initial capital cost of building any solar power plant, operating costs are extremely low compared to existing power technologies.
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These mounting systems generally enable retrofitting of solar panels on roofs or as part of the structure of the building (called BIPV). [2] As the relative costs of solar photovoltaic (PV) modules has dropped, [3] the costs of the racks have become more important and for small PV systems can be the most expensive material cost. [4]
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