The Home Energy Reactor converts household waste to power for the time machine\'s flux capacitor and time circuits using nuclear fusion. In the film, Mr. Fusion allows the De Lorean time machine to generate the required 1. 21 gigawatts needed to travel to any point in time. Awesome Inspired By Back To The Future Mens T Shirt. Sustainability Message All 8Ball Originals garments are WRAP certified, REACH compliant and Fair Labor Association accredited. They are printed in UK using Oeka-Tex and GOTS certified water-based inks.