The automotive industry is moving toward electric vehicles (EVs) solutions. This choice is supported by different aspects such as the decision to manage the environmental crisis, the ban on the sale of ICE vehicles starting from 2035, and economic concession by the government for EVs purchases. However, the transition from ICE vehicles to EVs is not so immediate. In this scenario, the EVERGRIN project, represents a valid solution to facilitate this transition, indeed it consists of involving a retrofit kit able to convert ICE vehicles into fully electric ones. The brain of the retrofit kit is the Vehicle Management Unit (VMU), a control unit that governs the electric powertrain and makes it compatible with the original elements of the vehicle.