The purpose of the "Site Electrical Diagram" is to provide information about each End-Run at the Customer Premise, including:
- Whether Load- or Supply-Side Connection is performed (usually Load-Side, at Main/Subpanels)
- Approximate distances (including bends) of Conduit (ex. End-Run #1 = 22'-3'-15'-40'-10'
- Location of Conduit (ex. penetrates rooftop, continues through attic, reaches subpanel in garage)
You can use a screenshot of the sunMAX system design as it appears in the sunMAX Geometry Design software. The same screenshot can be re-used in the "Drawing: PV Array" file submission.
It is highly recommended that you work with a qualified electrician with experience in the solar field to assess the electrical site.
Take a screenshot of the complete system design. For purposes of the End-Run, you should Zoom to show the Arrays, Conduit & Panel / Meter locations.
Identify End-Runs to Panel
Identify which Arrays belong to which 'End-Run', then number & color each End-Run (ex. #1, #2).
Note: The AC Wiring that exits the End-Run Assemblies for multiple Arrays CAN join to form a single End-Run, so long as the total number of Modules across all of the Arrays in the 'Complete End-Run' does not exceed 15.
For example, the End-Run Wiring for 2 x Arrays (of 9 & 7 Panels) join via Wire Nuts in an outdoor-rated Junction Box on the customer rooftop.
Identify Main Panel & Meter Locations
Draw rectangles at the locations of the Main Panel (and any Subpanel(s)) as well as the Utility Meter.
Identify Points along End-Runs to Panel
Draw points at each location in the End-Run that are of Structural, Mechanical & Electrical importance, including but not limited to:
- Entrance/exit at building interior/exterior
- Junction Box Enclosures
Note: Label the points accordingly—the attachments used in the "Example" below contain a high-resolution image & text file with short descriptions of each point.
See attached high-resolution diagram & supplementary text file.