Summary: Explore how battery energy storage systems (BESS) in Moscow are transforming power grids, supporting renewable integration, and addressing urban energy demands. This article covers key projects, technological advancements, and Moscow's role in Russia's clean energy. This study provides data on estimating the volume of excessive regeneration energy in the traction power supply system of the Moscow Metro and about technical means for its treatment using various types of energy storage units. The design of the thermal energy storage unit and the flowsheet of its. On January 30 of current year, the Mayor of Moscow, Sergei Sobyanin, opened a new 220/20/10 kV substation called "Belorusskaya" in the north of the capital, built by the power engineers of PJSC "Moscow United Electric Grid Company" (part of the GC "Rosseti"). For example, electricity storage is critical for the operation of elec ric vehicles, wh the need for effective electrical energy storage (EES). To cope with the problem of no or difficult grid access for base stations, and in line with the policy trend of energy saving and emission reduction, Huijue Group has launched an.