Horizon energy box hydrofill pro horizon fcjj 40 this energy box from horizon combines all horizon kits and modules into one large set for classroom use combining 100 experiments and hours of activities with just one set the box provides a complete understanding of how fuel cell technology interacts with renewable energy sources to create an entirely sustainable power grid supplied with car chassis base micro pem fuel cell h2air micro pem fuel cell h2o2 pem electrolyser led l