A charge controller is a great addition to any solar array, specifically those that are working above 10 watts on a regular basis. These small devices act as "ON" and "OFF" switches to protect your batteries. They prevent overcharging from damaging your batteries and can provide more advanced charging options depending on the make and model.
You should attend renewable energy fairs or visit renewable energy demonstration centers located in your area. You will get a chance to meet with experts and learn more about solar energy and the different types of panels you can invest in. You will make a better decision if you are properly educated.
In recent years smaller solar systems have become available that the average person can use at a relatively low cost. They might not be able to power your home, but they can power many of your smaller electronics and help you reduce the amount of energy you consume. Search for some smaller systems to help reduces your carbon footprint.