I have 11 panels on a roof in zip code 92004 (near San Diego) that are all tilted 5 degrees on a roof that points South (no obstructions). They are 320 Watt panels and right now they are averaging 267 watts per panel. Question is, what will be the peak wattage each panel will be able to produce when the sun is at it's max for the year. (assuming everything else stays the same).