I can believe it, your winter optimal is closer to 60 degrees. I think the production curve
really starts to drop at about 30 degrees from optimal. I'd bet you wouldn't notice that much difference between 40 and 60, but DUDE! C'mon go to Home depot and pick up a couple of 2x4's and build a simple braced lean-to / triangle. I mean I know you CAN use an old rotted fence post under each panel but sheesh! $50 of lumber I stretched a pair of these:
https://www.amazon.com/gp/product/B0831DDS9W/ref=ppx_od_dt_b_asin_title_s00?ie=UTF8&psc=1 with some angle iron. I did have to buy some longer hex drive bolts, to get the mounts to work. cheesy but funtional