Are you an experienced residential PV system designer, installer, project manager, or electrician looking to move into larger-scale systems? This session will introduce the important concepts you'll need to understand in order to successfully design and interconnect PV systems to a three-phase utility grid, including the most common three-phase utility configurations, and what kinds of information is needed from a site in order to be able to complete a commercial system design. Additionally, different examples of commercial switchgear, methods for how and where to interconnect a PV system on larger commercial sites and an overview of the different types of equipment to utilize will be discussed.