Solar Panel Installations - Commercial

Applicable Codes:
2021 International Solar Energy Provisions
2023 National Electrical Code

Please submit the following information:

1. A plan of the existing roof structure information (Rafters size, spacing, span, roofing materials, etc.) signed and sealed by a licensed Illinois design professional.
2. Written verification that the existing structure can properly accommodate all proposed imposed loads (signed and sealed by a licensed Illinois design professional). 
3. A plan showing the layout and installation specifics of the proposed solar array and associated equipment (including elevations and roof plan of the building, the mounting bracket specifications and wind ratings, required roof pathways, etc.).
4. Manufacturer installation specifications and requirements for the proposed array.

Significant Code Requirements

1. Arc Fault Protection - Arc-fault protection is required for photovoltaic systems with a maximum system voltage of 80 volts or greater. The system shall have an annunciator that provides a visual indication that the circuit interrupter has operated.
2. Access Pathways - Not fewer than two 36” wide pathways on separate roof planes, from the lowest roof edge to the ridge, shall be provided on all buildings. Not fewer than one pathway shall be provided on the street or driveway side of the roof. For each roof plane with a photovoltaic array, a pathway of not less than 36” wide shall be provided from the lowest roof edge to the ridge on the same roof plane as the photovoltaic array, on an adjacent roof plane, or straddling the same or adjacent roof planes.
3. Installation - The solar panels must be installed in compliance with the product listing, the manufacturer’s installation specifications, and all applicable provisions of the 2021 International Solar Energy Provisions.
4. Electrical Disconnect - The disconnecting means shall be installed at a readily accessible location either outside the building or inside nearest the point of entrance of the system conductors.

Inspections

The inspections listed here are required for all types of HVAC projects. Some inspections may not apply to your installation, while additional inspections may be needed based on the scope of work for your project. A complete list of your required inspections will be listed on the Plan Approval Notice that will be attached to the approved plans.