The H2ES-5 cogeneration (CHP) device consumes natural gas and simultaneously generates electricity and heat. Consuming 1.5Nm3/h of natural gas, it can simultaneously output 7.5kW of heat and 5kW of power. The comprehensive efficiency is as high as 93.5%, which can reduce carbon emissions by 30%. It is an efficient solution to reduce energy costs and carbon footprint. The generated electricity can be used on-site to supply a series of electrical appliances, and any excess electricity can be output to the power grid. The heat generated can be used to produce hot water.