Our Vision & Commitment

Microgrid Services Tariff

The Public Utilities Commission, in Order No. 36481, created two working groups: a  Market Facilitation Working Group and an Interconnection Standards Working Group.

The Market Facilitation Working Group will work towards:

  • Draft Microgrid Services Tariff ("MGS Tariff") language to enable microgrids that provide backup power during grid outages
  • Proposed compensation for the use of Hawaiian Electric's distribution system, if necessary
  • Recommendations to modify existing programs, and/or new programs or services, if necessary, to support microgrid development
  • Justification for compensation for clearly demonstrated benefits to non-participants, if necessary

The Interconnection Standards Working Group will work to draft language modifying Rule 14H regarding interconnection and islanding/reconnection of microgrids. The proposed interconnection changes should support microgrid and backup power applications under existing tariffs and the MGS Tariff. Consistent with Act 200, the new section of Rule 14H should standardize and streamline interconnection requirements and processes for existing and new microgrids.


  • March 30, 2020: Hawaiian Electric files draft Microgrid Services Tariff
  • February 27, 2020: PUC Technical Conference
  • February 14, 2020: Working Group Report filed with the PUC
  • February 6, 2020: Working Group Meeting scheduled from 8:00 a.m. to 11:00 a.m. HST.
  • January 17, 2020: Working Group Meeting scheduled from 8:00 a.m. to 12:00 p.m. HST.
  • January 9, 2020: PUC Status Update.
  • December 13, 2019: Draft Tariff, Modifications to Rule 14H and Rule 24 provided to Working Group for Review.
  • December 3, 2019: Working Group Meeting scheduled from 8:00 a.m. to 2:00 p.m. HST.
  • November 21, 2019: Working Group Meeting scheduled from 8:00 a.m. to 12 p.m. HST.
  • November 14, 2019: PUC held a Working Group status update.
  • November 5, 2019: Working Group Webinar scheduled from 8:30 a.m. to 10:30 a.m. HST.
  • October 14, 2019: Working group symposium held from 8:30 a.m. to 1:30 p.m. HST.
  • October 3, 2019: Working group kickoff held from 1:30 p.m. to 3:00 p.m. HST.
  • August 20, 2019: PUC issued Order No. 36481.
  • January 22, 2019: PUC issued Order No. 36106.
  • January 9, 2019: PUC held a technical conference.
  • July 10, 2018: Governor Ige signed Act 200 into law. PUC issued Order No. 35566 opening docket No. 2018-0163.

Microgrid Services Tariff Documents

Hawaii Public Utilities Commission Orders

Microgrid Services Tariff Contact Information

Email us at ken.aramaki@hawaiianelectric.com