ENERGY, FUEL ECONOMY & EMISSIONS 2. HYDROGEN FUEL CELL Fuel cells use renewable hydrogen fuel as a scalable electric power source for stationary and mobile equipment. We announced a three-year project through a collaboration with Microsoft and Ballard Power Systems to demonstrate a power system incorporating large-format hydrogen fuel cells to produce reliable and sustainable backup power for 4. BATTERY-STORED POWER Microsoft data centers. The project is Batteries power work with stored electrical supported and partially funded by the U.S. energy, instead of, or in addition to, an engine. Department of Energy under the H2@Scale In 2021, we debuted our first 100% battery- initiative and backed by the National Renewable powered electric drive mining machine and Energy Lab. Caterpillar is providing the overall made-to-match charger. We’ve also designed system integration, power electronics and a worksite power solution for a land-drilling controls that form the central structure of the operation that pairs a G3512 Natural Gas power solution. In addition, Progress Rail Generator with the Cat Energy Storage announced a memorandum of understanding System with fully integrated controls. The with BNSF Railway and Chevron to advance combination allows the customer to make the demonstration of a locomotive powered use of readily available field gas reducing the by hydrogen fuel cells. operation’s fuel costs and carbon intensity. 3. ELECTRIFICATION 5. MICROGRIDS Electric drivetrains and hybrid powertrains Microgrids integrate renewable energy sources employ an electric drive transmission with into electric power systems. These worksite power components to improve energy installations are particularly valuable in remote efficiency and productivity. The D6E XE locations where renewable energy sources high-drive dozer, for example, offers up like solar or hydropower are readily available to 35% better fuel efficiency and up to and electrical grids may deliver inconsistent 23% less fuel usage than previous models. power. Barrick Gold Corporation collaborated The 795 electric drive mining truck with a with Cat dealer Tractafric to install 7.5 MW of diesel-electric drivetrain has been paired with battery energy storage capacity for its microgrid a trolley-assist system that allows the truck at the Kibali gold mine in the Democratic to use electric power while traveling uphill, Republic of the Congo. Now operational, and then switch back to diesel operation if Tractafric’s solution deploys the battery energy electricity isn’t readily available. The trolley storage and Cat bi-directional power inverters system reduces fuel burn by more than to provide grid stability, while the Cat Microgrid 90% while on trolley. Controller seamlessly integrates up to 45 MW of power generated by three hydroelectric power stations and 36 Cat 3512 diesel generator sets. 22CATERPILLAR 2021 SUSTAINABILITY REPORT