What Size Solar System Do You Actually Need?

The most common question homeowners hit early on is how big a solar system they need, and the answers online swing wildly. This plain-language guide shows how system size is really decided: start from a full year of your own electricity usage, convert it to a target kilowatt size, then adjust for roof space, your offset goal, NEM 3.0 self-consumption, and any future load like an electric vehicle.