Vehicle power supply system

A vehicle power supply system comprising:

• plural vehicle electrical contactors extending along a top side of a vehicle, the plural vehicle electrical contactors including a control contactor and at least first and second power contactors, the first and second power contactors configured to receive different polarities of electrical power from an off-board power supply system to power the vehicle, the control contactor configured to conduct a control signal indicative of whether the first and second power contactors are conductively coupled with the off-board power supply system,
• the first power contactor configured to receive a positive polarity of the polarities of the electrical power and the second power contactor configured to receive a negative polarity of the polarities of the electrical power while the vehicle has a first orientation relative to the off-board power supply system,
• the first power contactor configured to receive the negative polarity of the polarities of the electrical power and the second power contactor configured to receive the positive polarity of the polarities of the electrical power while the vehicle has a second orientation relative to the off-board power supply system, the second orientation opposite the first orientation, and
• power electronics configured to rectify the polarities of the electrical power based on the vehicle being in the second orientation and not rectify the polarities in the first orientation, wherein the power electronics are configured to rectify the negative polarity received at the first power contactor to switch the negative polarity to the positive polarity and wherein the power electronics are configured to rectify the positive polarity received at the second power contactor to switch the positive polarity to the negative polarity.