The efficiency of a solar energy system varies a lot depending on its exposure to the sun. If you live in a sunny area, your system should produce enough energy to cover all your needs but solar energy might not be such a good investment if you live in an area where the sky is usually filled with clouds.
Decide whether you want to be on or off the power grid. Many people look forward to getting "off the grid" when they switch to solar power, however this may not be the best choice. Staying on your power grid means that when you have poor sunlight conditions you have the ability to purchase additional power when you need it. As a bonus, when you produce more power than you use, you can sell the excess back to the utilities.
I decided to get Solar Panels in July of 2011, and now with almost 7 years of data, I thought I’d share my finding, and what you can expect if you decide to go with …
Using the energy of the sun is a clean way to power the things we use. It's also sustainable as the energy never runs out. One hopes that technology will continue to progress so that everyone can use this energy. For now, you're planning to use it yourself, and that is a step in the right direction.