Patent ID: 8381540

Claim:
An installable HVAC system for a vehicle comprising: a housing; a compressor; a motor operatively coupled to the compressor; a condenser in fluid communication with the compressor; and a power management controller configured to run the motor with power from a given power source, and a battery management controller comprising at least one connection for electrically coupling the given power source with a first voltage and at least one connection for electrically coupling a second power source with a second voltage; wherein the battery management controller is configured to supply power to components of the installable HVAC system and an existing HVAC system of the vehicle from a combination of the given and second power sources with a combined voltage when an engine of the vehicle is turned off, wherein the second power source is disconnected when the combined voltage drops below a predetermined amount, wherein the compressor, the motor, the condenser, and the power management controller are located within the housing, and wherein the housing is configured to attach to the existing HVAC system of the vehicle.