I read the reviews before buying and therefore didn't expect this to last long, but I was quite irritated when it stopped working in the middle of the first day! So I checked it out and discovered that apparently we have TOO MUCH sun here in inland SoCal! It worked great until the middle of the day, but by noon, the sun was so strong that the motor went too fast for the impeller and it just couldn't keep up and quit. So I put a piece of duct tape over half of one of the solar panels to cut the power a bit and it now works like a charm. Today, it went right through the middle of the day without a hitch.