Solar Charge Controllers reduces the Power-cut problem.

A Solar Charge Controller is an essential part of nearly all power systems that charge batteries, whether the power source is PV, wind, hydro, fuel, or utility grid. Its purpose is to keep your batteries properly fed and safe for the long term.The basic functions of a controller are quite simple. Charge controllers block reverse current and prevent battery overcharge. Some controllers also prevent battery over discharge, protect from electrical overload, and/or display battery status and the flow of power. Let's examine each function individually.

With energy costs continually rising, using photovoltaic panels to get "free" electricity from the sun has become an intriguing concept. However, the cost of setting up such a system can be high enough to cancel out any potential savings. The most costly part of a system is the solar panel itself. Other than shopping around for good, used or surplus panels, there is not much that can be done in the way of lowering costs in that area.