I believe Carl is referring to solar mat panels. They are nothing more than a bunch of capillary tubes connected to manifolds at each end. They are shipped rolled up. They aren't very heavy and with adequate support can be mounted to a chain link fence. They do need a support structure of some kind and some way to hold them down in case of a high wind. They should also be angled roughly at about 45 degrees on a South facing exposure for best heat absorbtion. I have a 4x20' panel mounted on a wooden frame and held down by rope looped around the frame. Unfortunately I couldn't find a decent pic of the thing but I'll look more and if I can't find one I'll take one and update this post.
Al