LG Energy Payback (SCAC/AWHP/RAC) application is an integrated app for commercial inverter single zone products(SCAC), air to water heat pump (AWHP) and residential inverter products(RAC). This app is to show payback period and energy saving amount of LG single zone inverter products based on conventional On/Off products with the same capacity. Users only need to choose or select city, indoor setting temperature, operating schedule, inverter split system model price, and conventional system price. With these simple selection, LG payback application shows the payback period based on calculation of yearly energy consumption. Calculation of energy consumption uses a whole year weather data of the city that users selected so that it can provide localized results.