How much space does a PV system need?

For each kilowatt of capacity, you’ll need 100 square feet of space that faces south and is mostly un-shaded. Panels may be mounted on a flat or sloped roof or in your yard. In addition to the panels, you’ll need an inverter—which converts direct current to alternating current—a tie-in to the grid and, in many cases, a monitoring system that tells the installer how much power you’re producing.