Thanks for the info. Seems it was bought system, single titled axis, and the tilt could be changed manually for winter vs summer? Those large-area single-post

Thanks for the info. Seems it was bought system, single titled axis, and the tilt could be changed manually for winter vs summer? Those large-area single-post setups do look unsuitable for windy regions. My static solar panels do follow a rough sine shape through the day. Clear sunny mornings or evenings I get very little power - 2 sin(0) is still zero [a], whilst generating surplus power at midday is not much use to me. I think [b] additional panels sited e.g. SE and SW might save me more money than additional panels facing south, as then supply would tend to match my demand better. [a] I still get the 10% or so from atmospherically scattered sunlight. [b] As you can see, I don't really know. e.g. how much extra atmospheric absorption is there near sunrise/sunset on average etc.