Solar Panel Performance vs Panel Tilting

ktmrfs wrote:

I disagree that tilting doesn't make a difference in the summer. Further south, likely, but up north, it does. Not near as much as fall/winter/spring but it does.

I see about 20% increase in output in the summer between a flat panel and one tilted properly at 45 degrees north.

Easy way to set panel optimally

hold a empty TP or paper towel tube perpendicular on the panel
Adjust for zero shadow.
Done.

If I'm not around for the day, I set it for ideal around mid day.

To be clear I was referring to the Summer Solstice in Denver and per the above post the panel is set to the maximum sun elevation which is only 16 degrees from being flat. Under those conditions tilting doesn't buy much on that day. Different days and locations merit their own consideration for tilting.