Transformer (Distribution)
An electrical device on utility poles or in ground-level boxes that steps voltage down from distribution level (4-35 kV) to residential service (120/240V). Solar export capacity may be limited by local transformer ratings.
Why It Matters
Utilities sometimes deny interconnection if neighborhood solar exceeds transformer capacity. Understanding this helps you navigate interconnection delays.
Related Terms
Interconnection
The process of connecting your solar system to the utility grid, requiring utility approval and inspection.
Interconnection Queue
The backlog of energy projects (solar, wind, battery) waiting for utility approval to connect to the grid. As of 2024, over 2,000 GW of generation is waiting in U.S. queues.
Utility Interconnection Agreement
A contract between you and your utility that governs how your solar system connects to and interacts with the grid.