Metrowagonmash (MWM, part of Transmashholding JSC) will supply two battery electric locomotives with asynchronous traction drives to the Petersburg Metro State Unitary Enterprise.

According to the terms of the contract, the first electric locomotive will be delivered to the customer by March, the second by May 2022. The electric locomotives are expected to be based at the Severnoye and Yuzhnoye depots. The locomotives are purchased as part of the St. Petersburg Metro's special rolling stock renewal program for 2020-2025.

A contact-accumulator electric locomotive (ECA) is a locomotive running on electric motors that can be charged both from batteries and from a high voltage network. This rolling stock is used in the metro, as a rule, in situations where there is no voltage in the contact network and the use of conventional rolling stock is impossible. A battery electric locomotive can be operated as an independent mobile unit for performing shunting work on park tracks, as well as part of an economic train for transporting wagons and transporting household goods along metro lines.

The structure of the rolling stock is based on the body of the metro car 81-714. The all-metal body of a welded structure will contain two train control cabins with cabinets for equipment located inside them. Each driver's cab can accommodate up to 4 workers, including a locomotive crew. In place of the passenger compartment there is a battery compartment with a double-leaf metal cabinet.

The electric locomotives will be equipped with video surveillance systems consisting of 8 video cameras: two for each control cabin (driver's video cameras), two track video cameras (for recording events occurring during the movement of the train), two battery compartment cameras. The rolling stock is equipped with bogies with a reinforced frame. Each bogey will be equipped with two asynchronous traction motors. The nominal capacity of traction batteries is not less than 1000 A/h. The design speed of the electric locomotive will be 90 km/h; the service life of the locomotive is 50 years.