Solar Utility Interconnection in Los Angeles
Interconnection is the step that ties your finished solar system to the grid — and it’s what lets you actually use your power and, where applicable, receive credit for what you export. For Los Angeles homeowners, the process differs depending on whether you’re served by LADWP or SCE, and it ends with permission to operate (PTO). This page explains what interconnection involves, how it relates to net billing under NEM 3.0, and what to expect on timing.
Home Upgrade Specialist is a licensed Southern California solar and battery contractor (CSLB #1031989 HVAC, CSLB #1055444 solar/roofing/battery) and a Tesla Certified Premium Installer serving Los Angeles and Orange County. We handle the interconnection application and track it to PTO.
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What interconnection involves
- Application: a request to your utility to connect the system, submitted with the system details.
- Utility review: the utility confirms the system meets its technical and safety requirements.
- Inspection coordination: interconnection typically follows the local building inspection.
- Permission to operate (PTO): the final approval that allows you to energize the system and interconnect with the grid.
LADWP and SCE differ
Los Angeles is split across utilities, and interconnection isn’t identical between them. LADWP and SCE each have their own applications, requirements, and timelines, and rules can change over time. We manage the application for your specific utility so you don’t have to decode the differences. For how your utility shapes the value of solar and storage, see our NEM 3.0 guide and battery backup planning.
Where interconnection fits the project
Interconnection is one of the final stages, after design, permitting, installation, and inspection. It’s closely tied to PTO — the moment your system is cleared to switch on. Understanding the full sequence helps the home stretch feel predictable.
- See the solar permits guide for the approvals that come first.
- Read about solar inspections and PTO for the final sign-off.
- Review the solar design process for the full journey.
Plan your Los Angeles solar project
We manage interconnection to PTO
From the utility application to permission to operate, we handle the steps that get your system switched on.
Solar utility interconnection — frequently asked questions
What is utility interconnection for solar?
Interconnection is the formal process of connecting your solar system to the utility grid so you can use power, and where applicable receive credit for exports. It involves an application to your utility and ends with permission to operate (PTO), the approval to switch the system on.
How does interconnection work with LADWP vs SCE?
Both Los Angeles Department of Water and Power (LADWP) and Southern California Edison (SCE) have their own interconnection applications, requirements, and timelines, and rules can change. As your installer, we handle the application for your specific utility and keep you updated on where it stands.
How long does solar interconnection take?
Timelines vary by utility and workload, so we give you a realistic estimate for your situation rather than a fixed promise. Interconnection usually follows the local building inspection and concludes with permission to operate.
Can I use my solar before interconnection approval?
No. Your system should not be operated until the utility grants permission to operate (PTO). Turning a system on before approval can create safety and compliance problems, which is why we manage the process through to final sign-off.
