Multiport converters are used in various applications, where it is needed to interface multiple sources and multiple loads. As an example, multiport converters are used in renewable energy applications, distribution grids, electric vehicles, etc. Another field of application of multiport converters can be power supply units for medical equipment. To increase the reliability of medical equipment, it is beneficial to use batteries as a backup supply, in case of failures in the main power source. Also, modern medical equipment can have several functions, and different loads may require different characteristics of input voltages and currents. As an example of such modern medical equipment there is a surgical lighting system with adjustable positioning of reflector during the operation of the system. Such a luminaire requires different voltage levels for different system parts (LED drivers, control unit, sensors, etc.). Considering the necessity of adding backup power supply, the most suitable solution is the application of multiport converter. This paper deals with the initial evaluation of partially isolated multiport converter with the help of Matlab-Simulink model.