A solar power systems (Photovoltaic systems) production can be affected by many factors such as module mis-match (module mismatch is the fluctuation of output between two solar panel with the same plated wattage, but one produces less power than the other), shading, and obstacles such as dust or debris. In addition, non-uniform changes in temperature, solar irradiance, and shading create complex current-voltage curves, affecting energy output. This is due to the fact that in traditional systems the performance of the entire system is dictated by the performance of the weakest module.

Inverters are the single most important part of any solar system, they converts direct current (DC) power to alternating current (AC).  Every home and business in the United States uses AC power.  Inverters that integrated with the grid are called grid tied or a grid-tie.