If you are planning to install your JuiceBox outside and in the elements, have no fear that the box itself is NEMA rated, and weather-tight.
In some cases, customers like to enclose the JuiceBox due to the need to shade from direct sunlight, or just to 'hide' the JuiceBox from public view.
One of our customers sent me this link and a few pics if anyone is looking at this option. While we don't endorse this product, it should give you a decent idea to take and run with.
Outdoor Polycarbonate Enclosure