Off grid solar systems are often considered on farms and small acreages in locations where power is difficult or expensive to run. These locations typically do not have huge power requirements; the land owners just wish to have lights in a barn, a fence charger, or to run a small motor or power tool. Off grid solar systems provide an opportunity to have power without the expense of an electric service. Before purchasing an off grid solar system, it is important to have an idea of what electrical items the system will be used to operate, and to understand the components that make up the solar panel system (batteries, fuses, controllers, and inverters).