The rapid expansion of residential grid-tied pv arrays in Hawaii is outpacing expectations or the ability to set rational policy. As a result there have been disruptions to industry and unforeseen costs to citizens due to policy changes without advanced notice. This is the “interconnection nightmare” to which the title refers. Contemplating how such policy changes would affect Washington State, they would be a nightmare here as well.
This article states that several of HELCO’s substations have already experienced reverse power flow without negative results.