Effective July 9, 2025, the SDG&E ICA Map will include a Limited Generation Profile (LGP) template available for download. Generation interconnection customers can use this template as part of the R21 application process.

Accessing the Map

If you need assistance in viewing the interactive map, contact us via email.

Integration Capacity Analysis (ICA)

The integrated capacity analysis quantifies the capability of the system to integrate Distributed Energy Resources (DERs) within San Diego Gas & Electric’s distribution system. Results are dependent on the most limiting element of the various power system criteria such as thermal ratings, power quality, system protection limits and safety standards of existing equipment. 

Substation Location

Substations are shown on the ICA map as polygons from the initial global view of SDG&E’s service territory. Placement of the cursor and clicking on the substation polygon will bring up a pop-up window to show: substation name, existing generation, queued generation, total generation, projected load, penetration level, and a yearly load profile. 

Feeder and Line Section Location

The distribution feeder routes are viewable when the user zooms in closer to the street level view. The distribution feeder routes are shown as distinct ICA colored lines on the display. To display available capacity on the distribution system down to the line section or node level, the user can simply click on a particular line segment. Branches extending from the mainline feeder are shown in a grey color. Placement of the cursor and clicking on the line section will bring up a pop-up window to show: line segment number, the minimum value of integration capacity with operational flexibility, the minimum value of integration capacity with no operational flexibility, load integration capacity, circuit name, voltage, existing generation, queued generation, total generation, percentage of customer types, substation name, and a yearly load profile.  

General Notes

  • The website is intended to provide an initial screening of generation interconnection projects. A detailed study is required to confirm all distribution upgrade costs. The interconnection customer should not rely on any cost estimates on this website as they are only intended to provide high level cost information. 
  • The interactive substation area map is intended to show the general substation area and not a specific point of interconnection. The interconnection customer must meet with SDG&E to confirm the substation interconnection point. 
  • The interactive feeder map is not intended for an interconnection customer to identify the exact location for interconnection. The interconnection customer must meet with SDG&E to confirm the interconnection point. 
  • Feeder branch routes will not contain any integration capacity analysis data since they generally have limited capacity for interconnection. If a branch is proposed as a point of interconnection, this could potentially trigger significant distribution branch upgrades necessary to support the interconnection. 
  • The interactive website map is not intended for construction. 
  • Interconnection to the distribution system may also impact the transmission system and will require additional analysis.
  • All interconnection requests shall follow applicable interconnection requirements.