Hi All, I did not send away for the catalog. And I'm pretty sure the cost is prohibitive. Imagine a 12v - 100AH electrical source that does not polute and weighs in at 15.5 pounds. "MAX Power Marine Fuel Cell" Boatless Bill _http://www.max-power.com/fuelcell/index.html_ (http://www.max-power.com/fuelcell/index.html)