Experiment with various angles and placements, monitoring the power stored on a daily basis and making changes as necessary. Any angle might be acceptable, but there are times when a small tweak in the position can have a noticeable impact. Try different options and stick with the spot that works best.
Try to choose solar panels that can have their angles adjusted easily. The angle at which the sun hits the Earth changes throughout the year. This means that the best angle to catch the suns rays can be very different between summer and winter. Ideally you want to at least be able to adjust the angle of your panels twice a year, however if you can find some that allow adjustments four times a year (spring, summer, fall, winter) that is even better.
Contact your insurance agent to find out if a solar energy system could be included in your insurance policy. Expect your homeowner's insurance premiums to go up once your system is installed and consider switching to a different insurance agency if you find that your premiums have become too expensive.
This is the system I am using for mounting my 8 -100 watt solar panels on the roof of my workshop the flashing is called Quick mount PV.
Solar panels must be cleaned regularly. If your home is in a filthy region or close to the desert, they should be hosed weekly. Regardless of air born dirt and dust, you should do a through cleaning every couple months. Clean solar panels are productive solar panels.
Solar power could benefit you, even if you live in a region that sees a lot of clouds year-round. Many people are under the misconception that solar energy is only useful in areas that see a lot of sun. The current technology actually can use the energy that penetrates the clouds to power your home.