While there are many pros to using solar panels, PV systems also have a few downsides. Solar technology can have a high upfront cost of upwards of $20,000 or more. Solar panels also cannot generate electricity at night and have a reduced output on cloudy days, which could require a solar battery. You also need plenty of space to install solar panels — each module covers around 18 to 22 square feet. For this reason, homeowners with limited roof space or living in rented units may not be able to benefit from solar panels.
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