Why J3068?

SAE J3068

J3068 at NREL

example topologies

–There are a variety of heavy and medium duty electric vehicles with on-board three phase AC chargers using a variety of plugs including some proprietary systems.

–Some common issues due to lack of standardized and safe EV-ready alternatives

Some use standard NEMA or IEC outlets that are always energized for EV
Some lack plug proximity or interlock to prevent decoupling while charging, which causes arcing
Supply without ground fault protection

Testing at NREL for J3068
Energy Systems Integration Facility (ESIF) at the
U.S. Department of Energy’s National Renewable Energy Laboratory in Golden, CO
Transpower school bus
Type-2 three-phase AC inlet
Integrated motor inverter/charger (EPC Power)
Bus can charges discharge into grid up to 70kW
Test with AC EVSE shown on middle (shown case-less during EMI testing)
picture in the left shows 3 phase modern charging station with safety features

Example – EPC Power Integrated 3-phase system