The paper presents a model of hybrid energy storage, which allows to connect any number of modules to the system. Due to significant differences in the performance of various types of modules, such as power, and energy density, price, operating temperature, etc., combining them into a single system allows to extend their lifetime or reduce weight. The main objective of the authors was to provide a method for power distribution among devices making up the system, which ultimately will enable an optimisation of the power management strategy. An important parameter of the system is the possibility of its adjustment and upgrades. The summary identi- fies further directions of research.