PTO (Permission to Operate)
Formal approval from the utility allowing a grid-connected solar system to be energized and begin exporting electricity. PTO is the final step after installation and inspection.
Why It Matters
You cannot run your solar system until PTO is granted. Timelines range from same-day (some utilities) to 4-12 weeks (large utilities with backlogs). Ask your installer about typical PTO wait times.
Related Terms
Interconnection
The process of connecting your solar system to the utility grid, requiring utility approval and inspection.
Net Metering
A billing mechanism that credits solar energy system owners for the electricity they add to the grid. The excess power generated during the day offsets power consumed at night.
AHJ (Authority Having Jurisdiction)
The local government entity (city, county, or township) responsible for permitting, inspecting, and approving solar installations and other electrical/building work.