Solar CAD Detailing – Procedure

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A typical set of inputs we need from the client includes:

⦿  Hand sketch/Photograph of targeted roof along with the existing protuberances and shading

⦿  Scaling factor of the above image

⦿  Brand, model number and submittals of the panel to be used

⦿  Rafter arrangement with spacing

⦿  Locations of existing utility meter


Locate the building and obtain the image of the building using Google Earth.

⦿  Place the panel on the roof plan with the identified slope by avoiding protuberances and shadows of objects.

⦿  Show the attachments and mounts of the panel to the rafters.

⦿  Plot the electrical connections to the panel with the cable to be used and the junction box.

⦿  Plot the inter-connections to the support elements, inverter and solar power meter.

⦿  Prepare a single line diagram of panel arrays with the associated electrical elements and appropriate cables.


Using the given template, we prepare a set of pdf sheets as deliverables embedding the following:
Site plan & vicinity map

⦿  Google Earth 3D image of the building, panel location on roof, make, model and number of solar panels with dimensions

Roof plan & panel connection details

⦿  Arrangement of rafters

⦿  Panel support attachments

⦿  Electrical connection between panels, with solar power meters & junction boxes

⦿  Roof & panel area, roof & panel slope, roof & panel dimensions

Roof attachment details & electrical equipment location

⦿   Elevation of the building showing the solar power & utility meters along with other protuberances that are present

Electrical line diagram

⦿  Electrical single-line diagram depicting the connections between all electrical elements


⦿  Specifications of panels, inverter, solar power meters, cables, panels

⦿  NEC code of the state in which the building is located

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