What is aggregation?

Aggregation is a way for two or more buyers to procure renewable energy from a large-scale renewable facility. Currently our aggregation group consists of 15 members of the SPPA Working Group. Multiple buyers form a procurement group that identifies desired project attributes, finds a supplier and project(s) that meets these requirements, and enables each participant to sign separate, but similar, contracts. The main ways to do this are with an off-site physical power purchase agreement (PPPA), a virtual power purchase agreement (VPPA), or with a special contract through a utility.