Method and apparatus for supplying auxiliary electrical power to an electric or hybrid vehicle

An auxiliary power system for supplying auxiliary electrical power to an electric or hybrid vehicle, comprising:

• a towable trailer being mechanically couplable to a vehicle including a drivetrain, the drivetrain of the vehicle including one or more storage batteries and an energy conversion portion electrically couplable with the one or more storage batteries via a third pathway, the towable trailer including an auxiliary battery housing unit;
• at least one wheel being rotatably connected to the towable trailer;
• one or more auxiliary batteries disposed within the auxiliary battery housing unit of the towable trailer,
• a bidirectional electrical pathway electronically coupling the towable trailer and the vehicle, the bidirectional electrical pathway comprising:
• a first pathway electrically coupling the one or more auxiliary batteries of the towable trailer to the one or more storage batteries via a first coupling control circuitry;
• and
• a second pathway electrically coupling the energy conversion portion to the one or more auxiliary batteries of the towable trailer via a second coupling control circuitry;
• and
• a control system configured to control a transfer of electrical energy between the one or more auxiliary batteries of the towable trailer and the one or more storage batteries of the drivetrain via the first pathway, a transfer of electrical energy between the one or more auxiliary batteries of the towable trailer and the energy conversion portion of the drivetrain via the second pathway, or a transfer of electrical energy between the one or more storage batteries of the drivetrain and the energy conversion portion of the drivetrain via the third pathway.