Ask your solar panel vendor about the certifications they have and about the testing of the panels you are interested in. You might qualified for some rebates offered by the government if you go through a certified vendor and choose panels that have received certifications too. Besides, this is a good way to make sure you are getting a quality product.
Once your panels are in place, keep an eye on them and monitor them regularly. Get to know what you daily output of energy is, what everything looks like when operating optimally and even keep a record of such things. This can help you quickly notice when something isn't working correctly and help you ascertain where the problem is.
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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.
Once you buy a system, one of the first things you will notice is how quiet your solar cells are. As they draw in energy from the sun, they make absolutely no noise. This is something that most owners appreciate, as all other renewable energy sources make some noise as they operate. Particularly if you have a stressful job or a stressful life, the last thing you need is a noisy system interrupting your few moments of peace.