Solar array sizes can vary significantly, but here are some general guidelines to give you a sense of what to expect:
Residential solar arrays are typically between 3 and 10 kilowatts (kW) in capacity, with 6 kW being a common size for the average home. A 6kW system normally includes around 18 to 20 panels, and a standard residential solar panel is about 65 inches by 39 inches, meaning the whole system would take up roughly 315 to 350 square feet of space.
Commercial solar arrays: Commercial systems are generally much larger, ranging from 25 kW up to several megawatts (MW). The physical size of a commercial array will vary accordingly, but a 100kW system would likely take up roughly 5,000 to 10,000 square feet of space.
Utility-scale solar arrays: These are the largest types of solar installations and are often referred to as solar farms or solar parks. They can be anywhere from a few megawatts to over a gigawatt (GW) in capacity, covering areas that can range from a few acres to several square miles.
Remember, these are just rough estimates. The actual size of a solar array can vary based on several factors, including the efficiency of the solar panels, the available sunlight, the tilt and orientation and the specific energy needs of the property.
» MORE: Solar panel size and weight: a guide