INTERCONNECTION

What solar interconnection includes

1. Interconnection application

Submitted to the local electric utility with system details:

• System size (kW), inverter type, and equipment specs

• Single-line electrical diagram

• Proof of permits or final inspection (often required later)

• Customer and service address information
  
  

Purpose: Allows the utility to review grid impact and safety.

2. Utility review & approval

• Confirms inverter certifications (UL 1741 / IEEE 1547)

• Checks transformer capacity and feeder limits

• Determines eligibility for net metering or export rules

• Issues Approval to Install (ATI) or conditional approval
  
  

3. Installation & inspections

• System is installed and passes final AHJ inspection

• Inspection sign-off is submitted to the utility
  
  

4. Metering & utility actions

• Utility may install or reprogram a bi-directional meter

• Utility may perform a site visit or remote verification
  
  

5. Permission to Operate (PTO)

• Final written approval from the utility

• System can be turned on and export power to the grid

• Billing credits or net metering officially begin
  
  

Why solar interconnection matters

• Required by utilities—no interconnection means no PTO

• Protects grid workers and infrastructure

• Ensures fair and accurate energy billing

• Prevents forced shutdowns or penalties
  
  

Typical timeline

• Residential: 2–6 weeks
  
  

In simple terms

Solar interconnection is the utility’s green light—confirming your solar system can safely connect, turn on, and send power to the grid.