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If we do not consider the rebates that some countries offer on solar panels, the payback normally runs between 20 and 25 years. The long payback though ignores the increased benefits to the planet and the possibility of increased electric costs over that time period.

Panels will also degrade with time. Warmer climates may see a slightly longer payback period, due to the decreased performance of solar panels. I have several panels on my home and they actually produce more power in the winter months, despite the shorter daylight periods, due to the cooler temperatures

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Q: How long does it take for a solar panel to pay for itself?
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How long does it take to charge batteries with a solar panel?

No set answer to that. It depends on the capacity of the battery, the size and efficiency of the solar panel and the intensity of the sunlight.


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That depends on the amp-hour capacity of the battery.


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Can you use a 0.4w 4.5v solar panel to charge a 4.8v battery?

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