Modular cooling system for a power source

A modular heat exchanger module for a power source comprising a first end part a first radiator section and a second end part, where the first end part is provided with an inlet opening and a first outlet opening, where the second end part is provided with a first inlet opening and an outlet opening, where the first outlet opening of the first end part is connected to an inlet opening of the first radiator section, where an outlet opening of the first radiator section is connected to the first inlet opening of the second end part, wherein the first end part is releasably connected to the first radiator section and that the first radiator section is releasably connected to the second end part, wherein the modular heat exchanger module further comprises an intermediate part and a second radiator section, where the outlet opening of the first radiator section is connected to an inlet opening of the intermediate part, where an outlet opening of the intermediate part is connected to an inlet opening of the second radiator section and where an outlet opening of the second radiator section is connected to the first inlet opening of the second end part, where the first radiator section is releasably connected to the intermediate part, that the intermediate part is releasably connected to the second radiator section and that the second radiator section is releasably connected to the second end part.