[1]: 1 Initial discussions in the Electric Power Research Institute's Infrastructure Working Council meetings regarding issues related to three-phase charging in North America led to the development of J3068.

[2] Therefore, SAE authorized a new task force to develop a standard that focused on heavy and medium duty applications, and more generally any vehicle charging at commercial and industrial locations or other places where 3φ power (three-phase) is available and preferred.

Differences in logic and nomenclature between J3068 and 61851-1 Annex D are detailed in J3068 (2018) Appendix F. J3068 states that it aims to cover three-phase equipment which meets applicable North American listing standards.

Given that a 480Y/277 VAC three-phase wye-connected four-wire supply is a common configuration supplied by utilities at commercial locations – under SAE J3400 and SAE J3068 the implied higher rating is taken; thus allowing single-phase charging at 277 VAC nominal for North American application.

Also, SAE J3400 electric vehicles in North America are required to support power transfer under PWM-CP at 277 VAC.

LIN-CP (Local Interconnect Network on the Control Pilot) was originally specified in IEC 61851-1 Annex D in Edition 3.

[1]: 1  [7] LIN-CP is similar to the approach used by Tesla based on J2411 (Single-wire CAN), but maintains the CP voltage levels from analog PWM to be compatible with existing EVSE safety models.

The extended voltage range is required because the LIN transceiver must operate when the Control Pilot is at 6V level (similar to "State C" in J1772).

Also, SAE J3068 has additional requirements on the infrastructure proximity circuit (aka socket-outlets EVSE in North America) that allow them to support 48 A carry-along cable assemblies.

On 7 November 2018, Greenlots announced a project to provide charging infrastructure for all electric Volvo Trucks in Southern California.

"According to Greenlots, the project will be one of the first in North America to demonstrate a new heavy-duty vehicle charging standard, SAE J3068, in real-world applications."

An alternative LDF may be needed for LIN stacks that don't support the same signal appearing in multiple frames.

The intention is to deprecate this version when the increased functionality is added to SAE J3068 in an updated edition of the recommended practice in the near future.