Solar Design Services


DIN Engineering Services is the world's leading provider of Solar PV installation Design and Drawing Services. We are focused on partnering with solar installers and contractors in the U.S. to bring in efficiencies on the Solar Designs and Engineering Drawings.

Proposal Drawings

  • Initial Roof and Array Sketch
  • Shading Analysis
  • ROI Calculations
  • Pricing Estimates, Incentives, Rebates & Savings
  • Turnaround — within a few hours!
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Permit Packages

  • Title Page, PV Layout
  • Attachment and Structural Details
  • Electrical Details, SLD / 3LD, Calculations
  • Wire & Conduit Sizing
  • Inter-Connection method
  • Elevations, Signages, Spec Sheets
  • Turnaround - within 24 hours!
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As-Builts Drawings

  • Updated Permit Drawing
  • Package to Show the Actual System Installed
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Commercial Concepts

  • Project Array Layout
  • Project Sizing & Design Optimization
  • Concept SLD / 3 Line Diagrams
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Key Differentiators

  • Trusted Engineering Design Partner Since 1999.
  • Providing end-to-end services, from Proposals to Inter-Connection.
  • Designed 300,000+ Jobs across AHJs and Utilities.
  • Working with majority of the Top 50 Solar Installers in U.S.
  • 24x7 Operations. 350+ Full-Time PV Design Engineers.
  • ISMS 27001:2005 and ISO 9001:2008 Quality Certified.
  • Customer Satisfaction Index 4.9 / 5.0 .
  • LEAN Six Sigma Practices and Agile Operations.
  • Rated amongst The Top10 Engineering Design Companies.
  • Customers Include Solar Startups / Mid-Size & Large Enterprises.

Solar Services


  • Residential Design
  • Commercial Deigns
  • Utility Scale Design
  • PVSYST Simulations

We have extensive experience in designing of residential solar system. We provide variety of services in this sector ranging from sales to interconnection. Our team has in depth knowledge of AHJ and Utility requirements and are acquainted with various codes and compliances.

Proposal Drawings

We provide accurate proposal documents for solar installers helping them to gain business. We provide 12-24 hours turnaround to the customers enabling them to pace up the signing up process. We just need the address of the locality and we will create the proposal drawings by which the estimated system size can be determined.

Permit Drawings (On-Grid & Off-Grid)

We provide PV permit and installation design drawings for residential PV systems. Our designs meet the national electric codes (NEC) and local municipality standards. We are proficient in Flush Roof Mount, Tilt Roof Mount, Non-Penetrating Roof Mount, Ground Mount, Micro-inverters etc...

We design and draft complete Solar Permit sets which includes:

  • Title Page
    • Sheet index
    • Governing Codes section
    • Vicinity map, parcel map, aerial view
    • Description of the project
  • PV Layout
    • Locations of all major components and equipment
    • Attachment point spacing
    • Point loads
    • Conduit runs
    • Solar PV array location and dimensions
  • Mounting Method
    • Elevation of attachment method
    • Racking and mounting hardware
    • Structural sections
  • Wiring Diagram
    • 3-line wire diagram
    • Wire and conduit sizing
    • String / Branch circuit sizing for DC and AC systems
    • Grounding details
    • Interconnection method (breaker, line-side splice, subpanels, etc.)
    • All electrical calculations
    • System specifications
  • Signage
    • All required placards
    • Specifications of placard physical sizes
  • Specification Sheets
    • Solar Modules
    • Inverters
    • Racking

We also understand the various AHJ (Authority having jurisdiction) and HOA (Home owners association) requirements / guidelines and has been working using varied static and dynamic blocks and templates.

We do shading analysis and solmetric calculations to ensure the proper positioning of the solar panels. We are conversant with the Solmetric PV Designer / Solmetric SunEye and with calculation applications like PVsyst.

Design Changes/Revisions

Changes occur in the proposed solar system many a times. DIN Engineering Services can step in at any stage and can take the design forward. We can work on changing racking, electrical equipments, mounting planes etc... and can provide you quick turnaround of as low as 12 hours.

As-Built Drawings

The as-built drawings show how the system was actually installed and reflect any changes made to the design during installation. If as-built drawings are not produced, the client will not have a record of how the system was actually installed.

To enable the client having the most recent drawings, we provide the as-built drawings services to our customers. We require either the hand sketch of the changes made during the installations or the photographs so that we can amend those in the drawings.