Maximize the output of your solar panels by adjusting them seasonally. Adjusting your panels twice a year, once in the summer and once in the winter, will ensure that your panels are producing the maximum amount of energy by taking into account the earth's changing position relative to the sun.
Don't waste your time lining the solar panels beneath an array of florescent lights--though it may sound tempting. Solar cells are not designed to generate a voltage from fluorescent light sources and this is a waste of energy of time. Any spot in the yard would be a better location for the panels.
While solar panels can continue to work on days when it is not sunny, you should not have them installed if you live in an area that is cloudy most of the time. The amount of energy you save with them will not be worth the amount you paid for them.