To power so many sub-devices in a vehicle, the electrical architecture is inherently complex, and to make matters worse, there is currently no unified standard in the industry. In the absence of industry standards or generally accepted templates for reference, OEMs define the specifications and standards of their electrical architectures, and even the specifications and standards of different brands and models of the same OEM are not the same. Even cars of the same brand can vary greatly in electrical architecture due to size, weight, or whether the vehicle has luxury features that require extra power.