I have an emporia energy meter. While I can’t answer your question exactly, I have sprayed mine with a hose during the hottest part of the day and watched the power usage drop a decent amount. So I imagine as long as the shade wasn’t too expensive it’ll pay for itself.
Sprayed it down with the hose again. Pic added showing energy usage drop. Doesn’t last long from water, but does show it not working as hard when cooler.
I have an emporia energy meter. While I can’t answer your question exactly, I have sprayed mine with a hose during the hottest part of the day and watched the power usage drop a decent amount. So I imagine as long as the shade wasn’t too expensive it’ll pay for itself.
Sprayed it down with the hose again. Pic added showing energy usage drop. Doesn’t last long from water, but does show it not working as hard when cooler.