Intelligent Energy, a UK-based hydrogen fuel cell manufacturer, is at the forefront of developing innovative power solutions ranging from 800w to over 300kW. Their technology has been successfully utilized in automotive and aerospace industries. 'Project Ester' is a key initiative by the company, focusing on evaporatively cooled fuel systems designed to address the limitations of conventional battery-electric solutions in various vehicle types. Ashley Kells, programme director at Intelligent Energy, sheds light on the company's journey since its establishment in 2001. The company's product range spans from UAV drones to heavy-duty vehicles, with successful implementations like integrating their technology into BMW's factory operations. Intelligent Energy's approach extends to utilizing under-utilized hydrogen sources, offering a sustainable method of energy generation. The technology developed by Intelligent Energy revolves around scalable metallic-based fuel cells, used in heavy-duty trucks, buses, and passenger cars. The company's unique strategy involves providing complete fuel cell engines, offering a holistic solution for customers. These engines, installed in buses in Taiwan and about to be used in a UK truck, demonstrate the practicality and efficiency of hydrogen fuel cell technology. Intelligent Energy's commitment to sustainable energy solutions is further emphasized by their optimized fuel cell engine for passenger cars, designed to fit under the bonnet while delivering up to 157 kilowatts. The company's comprehensive approach in providing complete fuel cell engines sets them apart in the industry, showcasing their dedication to driving the adoption of hydrogen as a viable alternative fuel source.