There’s an easy answer: Because of your money!
To obtain information about solar energy in an optimal way, you need expert advice in achieving your solar requirements. The easiest way to do this is to call one of your registered local solar energy companies and make an appointment for a consultation at the place of intended operation. Usually the consultation is free of charge, because the solar company knows that there is a good business opportunity waiting. Companies from other areas are likely to charge you for their consultation.
The representative of your local solar company will gather all relevant data, including obstacles such as shady hills and trees, to figure out which combination of products fits best and where to perfectly install the system to gain full advantage of solar energy. Let the company know that you want your solar system as simple as possible, because more complex systems need more technical support. This will help you to safe significantly on maintenance costs in the future.
Solar energy systems are build for long term use, nevertheless some unforeseeable problems could occur. By selecting one of your local solar energy companies, you will dramatically cut repair costs and have a much lower response time, which will save you money and discomfort.
If you select the cheapest solar energy company on the market you might find out that the cheapest offer will turn out to be more expensive than expected. So just ask your local professional solar energy business for as much information as possible, before making a buying decision.