We had a foot of snow yesterday. The solar air panels in the barn got up to 140F because the photovoltaic panels that provide electricity to run the fans were covered in snow. The temperature of the air panels is usually around 100-110F when the fans are running. When the fans aren't running, natural convection will cause air to flow through the panels at a much slower rate, hence the high temperature.
I need to add a picture of the barn with solar panels!