Everything looks well planned and placed except the solar panel. Wouldn't last long at our place hanging down like that.
Dang, what do you have on your place? The solar panel is screwed to a piece of 14 gauge steel plate that is welded to another 14 gauge steel plate, the wire is completely concealed going through the plate into square tubing.
While mounting plate is good design; cattle and big hogs will still damage the solar panel (lick on it, lean on it, hooves on it, crack it and slobber on it). Thus, I would mount it higher.
Good looking feeders. are you planning to build and sell?