Not all solar panels are the same. First, you'll want to consider your choice between photovoltaics solar panels — otherwise known as solar electric — and solar thermal panels. Photovoltaics are far more common, and use solar cells to directly convert sunlight into electricity. Solar thermal panels, on the other hand, use mirrors to concentrate sunlight and are typically used for water heating. Solar thermal is more efficient but only is maximized when the sun is out. PV panels are more versatile and longer-lasting.
In addition to the type of solar panel that you want, you'll also have to take into consideration the same things that you would for any major purchase: things like performance, durability, and warranty. These will all vary, and some panels will be better suited for your particular needs. Make sure to do your research and seek out reliable sources and other user experiences to get the best information before making your decision.
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