Many governmental vehicles need onboard power for many days and weeks to supply onboard electronic devices eg. to capture and process images or audio files to command control vehicles or recording devices.
Long autonomy is needed to avoid turning on the engine, enable positive mission results of undercover operations, and provide flexibility and safety for the operators. The energy source has to fit in a standard passenger car, without producing signature.
Up to two EFOY Pro fuel cells are directly connected to the onboard battery, charging it on demand. Electronic devices are connected to the onboard battery, supplying 12 V DC and, if necessary, 230 V AC current.