Thanks for the ideas. Tilting them seems to be the easiest thing to try to improve output. We shall see!
Discussion
Imagine a line coming directly from the sun to the surface. You want the panel perpendicular to that line. Sunlight has 1000 watts per square meter depending on various factors. Solar panels are about 22% efficient at best, you need every advantage you can get! Glad to help. I’ve been off grid for a few years, learned a few things along the way.