Olvondo Technology develops, sells, and operates a Stirling based renewable energy technology known as the HighLift heat pump. The engine uses less than 3 kg of helium (refrigerant gas R-704) as its working medium. Helium makes the heat pumps suitable for any application, as it is an environmentally friendly working medium that is non-toxic, non-flammable and has a global warming potential (GWP) of 0. The heat pumps have a rated output of 750 kW heat. The HighLift is designed for heat pumping applications with sink temperatures of up to 200°C. As the working medium of the process is a gas and does not undergo any phase changes during the process, the HighLift heat pumps have very few restrictions on source and sink temperatures. Additionally, the process will quickly find a new equilibrium state with changing temperatures, meaning that the process is very robust with respect to large and sudden changes in inlet temperatures.