Sun’s out: Yesterday afternoon got warm enough to melt off quite a bit of remaining snow cover, and last night got plenty cold enough to freeze all the resulting moisture back out of the atmosphere. The result was a nice hard frozen ground for my morning walkie…
Coming home over the ridge overlooking the Lair, I noted that the rooftop solar panels had already shed their frost but the groundmount panels hadn’t even started. This was no surprise, since they’re aimed in different directions* and of course the rooftop panels had been out of the shade longer.
But there was a sort of smudge on one panel I thought rated a closer look…
I have no explanation for this. These panels are over 15 – probably closer to 20 – years old and this might be a sign of some sort of malfunction. But I can’t imagine what it might be. The system overall seems to be working fine.
*When I built the cabin I deliberately oriented it such that the roof slope would face due south, thinking that was the right thing to do. In a classic example of not knowing what you don’t know, I had completely forgotten/ignored all that talk about “declination” in my long-ago ground nav courses. In the SW desert, the difference between magnetic south and true south is substantial.
In a classic example of what we’ll call a Reverse Murphy, this later provided the unintended advantage that my rooftop panels function better in early morning while my groundmount panels function better in latish afternoon. Also they’re set at different angles, with the groundmount panels (deliberately – not everything I do is a mistake) permanently angled to take better advantage of winter sun, but that’s not really relevant to this post.