Abstract: A system for controlling operation of a heat pump configured with an electric heater. The system comprises an occupancy sensor positioned in an area of interest (AOI) and is operable to detect presence/absence of occupants within the AOI. The system supplies air within the AOI while flowing the air through the heat pump and the electric heater. The system comprises a controller that is configured to receive data pertaining to a first predefined temperature for the air to be supplied to the AOI, monitor real-time temperature of the air being supplied to the AOI, detect, using the occupancy sensor, presence of the occupants within the AOI, and operate, upon detecting the presence of the one or more occupants within the AOI, the heat pump and/or the electric heater to adjust the temperature of the air being supplied to the AOI to the first predefined temperature.

Abstract: A system includes an air conditioning system including a first unit including a compressor and a second unit; an energy storage device; a first transfer switch providing a power connection to the first unit; and a system energy manager configured to control the first transfer switch to supply power to both the second unit and the first unit from one of an AC power grid or the energy storage device.

Abstract: A testing and charging system for a heating, ventilation and air conditioning (HVAC) system includes a testing and charging apparatus operably connectible to a refrigerant line of the HVAC system, an inert gas supply operably connected to the testing and charging apparatus, a refrigerant supply operably connected to the testing and charging apparatus, and a controller. The controller is configured to command the testing and charging apparatus to perform a pressure test of the HVAC system, command the testing and charging system to perform a vacuum test of the HVAC system, and command the testing and charging system to charge the HVAC system with refrigerant.