The article presents the results of an experimental study of the energy characteristics of the power supply system of the mobile mechanical lung ventilation device (MLV) “Phase-21” from flexible photovoltaic converters (FPVC) manufactured by Uni-Solar (China). This experiment showed that it is possible t- use flexible photovoltaic converters based on both amorphous and single-crystal silicon t- power mobile mechanical lung ventilation device. It is established that the third-generation flexible photovoltaic converters, which have high efficiency, low weight, compactness and lower cost, in comparison with single-crystal photovoltaic converters, can be widely used for powering the mobile mechanical lung ventilation device. In the current world sanitary and epidemiological situation, mobile solutions for energy supply are particularly relevant.