本SAE推荐规程涵盖了基于120 VAC单相发动机的辅助动力装置或发电机组的设计和应用。本文件旨在为单相标称120 VAC提供设计指导，因为它与卡车12 VDC电池和电气结构连接，为卡车卧铺驾驶室酒店负载供电，以便在主推进发动机关闭的情况下运行。

This SAE Recommended Practice covers the design and application of a 120 VAC single phase engine based auxiliary power unit or GENSET. This document is intended to provide design direction for the single phase nominal 120 VAC as it interfaces within the truck 12 VDC battery and electrical architecture providing power to truck sleeper cab hotel loads so that they may operate with the main propulsion engine turned off.