Katadyn Power Survivor 40 E Watermaker Desalinator Produces 1.5 gallons of fresh water per hour--enough for 2 to 3 crew members Katadyn's patented Energy Recovery system produces water at a fraction of the energy used by conventional watermakers Draws only 4 amps from a 12-volt system Separation of primary system components allows for easy installation in tight spaces Most components covered by three-year warranty