The problem issues of non-drainage storage of cryogenic fuels in modern modular long-term storage systems are considered. The structure of software for remote monitoring the container and small-scale reservoir equipment for storage and transportation of cryogenic fuel is presented. The relationship of software modules for computational modeling of hydrodynamic and thermodynamic processes during storage of cryogenic fuel in stationary and transport conditions, a module for calculating the holding time of non-drainage storage, and individual data transmission modules installed on cryogenic tanks are disclosed. The composition of the software of operators responsible for remote monitoring of the state of multimodal transport units during transportation and long-term storage at the point of consumption is described. An example of energy-efficient technical solution for increasing the holding time of non-drainage storage of liquefied natural gas during storage and transportation in multimodal transport units are considered. In the autonomous power supply system of the multimodal transport unit under consideration, the conversion of solar energy is used to charge accumulator batteries. The results of calculations of electricity consumption for increasing the holding time up to values of 150-200 days, demanded by consumers of cryogenic fuel, are presented.