India also protects its borders in the inhospitable regions of the Himalayas. At an altitude of more than 5,000 metres, the authorities have set up monitoring stations to sound the alarm if anyone crosses the national border. In order to supply the technology with energy in the lonely mountain regions, the border guards have said goodbye to an energy source that is usually used in such cases: the diesel generator. Instead, they use fuel cells: Small power plants from the Munich-based supplier SFC energy, hardly bigger than a car battery.