Vehicle power flow monitoring

A vehicle electrical power flow monitoring system comprising:

• a user interface;
• a parasitic power flow monitor having a hierarchical architecture and including
• at least one channel power monitor node corresponding to a respective power distribution channel of a vehicle electrical power system, the at least one channel power monitor node being common to at least another different vehicle monitoring system, and
• a plurality of acquisition nodes within each power distribution channel, each of the plurality of data acquisition nodes being common to the at least another different vehicle monitoring system and communicably connected to a corresponding channel power monitor node;
• and
• wherein the at least one channel power monitor node is configured to receive electrical power flow data from respective ones of the at least one data acquisition node and determine an operating state of the vehicle electrical power system based on the electrical power flow data.