A solar array is any order or group of solar panels and is used for energy production or water heating. A solar array can be as big as we need it to be and deliver enough energy or warm water for an entire house. An important aspect is the array placement.
Photovoltaic systems often produce more electricity than needed at the time. The sun shines during daytime hours rather than at night when electricity is needed. Fortunately, solar power can be stored in a solar battery that serves as an energy reservoir.