The EFOY Pro fuel cell, with up to four solar modules, is integrated in the EFOY ProTrailer. The hybridisation of fuel cell and solar modules combines these two power generators in a cost-effective way. Only if sufficient power is no longer generated via the solar panel, for example, in bad weather, during winter or in the shade, will the fuel cell turn on fully automatically to take over the power supply. This saves operating costs. As with all EFOY Pro energy solutions, the new EFOY ProTrailer offers extremely long power autonomy without any need for user intervention and it can be configured to suit the customer’s requirements.