Here's what's shocking: A single square meter of solar panel can generate anywhere from 150 to 250 watts under ideal conditions. But "ideal" rarely exists in real life. Under optimal conditions (5 peak sun hours): At noon under direct sunlight: *Note: 1m². . The answer lies in something most solar salespeople never properly explain— solar irradiance and your actual energy potential per square meter. Explore. . Solar panel efficiency is crucial for a solar power system's success. High-efficiency panels convert more sunlight into electricity, boosting overall output. This metric shows how much power a solar panel produces per square. . The amount of sunlight received per square meter on the solar panels determines the output you will receive from the solar panel system. It allows homeowners, small building owners, installers and manufacturers to easily develop estimates of the performance of potential PV installations. Operated by the Alliance for Sustainable. .