This SAE Recommended Practice is intended to describe the application of single-phase DC to AC inverters@ and bidirectional inverter/chargers@ which supply power to ac loads in Class heavy duty on-highway trucks (10K GVW). The document identifies appropriate operating performance requirements and adds some insight into inverter selection This document applies to factory and after-market installed DC-to-AC inverter systems (Including inverter chargers) providing up 3000 W of 120 VAC line-voltage power as a convenience for operator and passenger use. Such inverters are intended to power user loads not essential to vehicle Operation or safety (e.g.@ HVAC@ TV@ microwave ovens@ battery chargers for mobile phones or laptop computers@ audio equipment@ etc.) Systems incorporate the inverter itself as well as the input@ output@ control@ and signal wiring associated with the inverter. Requirements are given for the performance@ safety@ reliability@ and environmental compatibility of the system These are recommended requirements to be used by vehicle manufacturers in the development of their own specifications@ which may incorporate more or less stringent requirements This document scope excludes military vehicles@ bus and 28 V systems Purpose The purpose of this document is to define requirements for inverters and inverter chargers used on class eight on highway heavy duty trucks