Dive Brief: A federal rule intended to lower barriers to distributed energy resources (DER) in wholesale markets still faces many questions about what DER aggregates will look like, how the new parties will interact with existing grid management, and what individual state roles might be. The Federal Energy Regulatory Commission's Order 2222 doesn't limit participation in aggregating programs to particular business models and companies, speakers noted at a virtual session hosted last week by free market think-tank R Street Institute. A nonprofit could theoretically bring different DERs together, and the order might also open the door for Google or Apple to get involved in this space, something