Solar panels come in different sizes and with different connection. These systems accommodate your needs accordingly. Some panels are made to provide you with more power output to use; some provide you low or feasible power so that can fulfill your need. Some are made for commercial or residential use while others are made to accommodate you in remote areas.
All of these systems have there own advantages and disadvantages. Some of the common used system like the grid tie is effective. They let you use power from two different sources, your own from the solar panel and from the city grid station. If you produce excess energy than your consumption level then you can sell this energy back to the company, so now you have become the seller yourself. Also this system allows you to reduce your utility bills. Another system, the small stand alone provides you power according to your power requirement. You can increase the power output by increasing the number of solar cells on your panel. These systems are similar to the stand alone system and are very efficient. An inverter converts the DC power collected in the panels into AC power that provides you electricity.
