Balgium also has far less solar energy available to it, in its perch on the often-cloudy North Sea. A typical square meter of Belgium has only a little more than half the sunshine falling on it that a square meter of southern California does.
Key specifications to consider when evaluating solar panels are the wattage or power rating, efficiency percentage, operating voltage, current output, and the temperature coefficient that indicates how the panel's performance is affected by temperature changes.