There is really no reason to even consider getting a solar energy system if you live in an area that rarely sees the sun. This does not mean that a less than reputable company will not try to sell you a solar system though. If your roof does not receive at least 6 hours of full sunlight per day, you should not consider solar power.
One of the biggest and best advantages of solar energy is that it does not release any harmful substances in the environment. Fossil fuels, which are used for regular energy, give off harmful substances, like carbon dioxide. In the end, these gasses can ruin the environment and harm animals and plants.
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.