Distributed generator (DG) size and site are an important aspect while deciding DG capacity introduction in distribution system. The paper proposes the methodology of successive optimization for placement of multiple DG units in primary distribution system. The placement is optimized for system loss minimization. The paper investigates the effect of multiple DG units placement of same type as well as the effect of a mix of DG types is also investigated. © Springer Nature Singapore Pte Ltd 2020.