Solar Permit Plans & PE-Stamped Engineering Services

Quick Answer: Need solar permit plans for your residential or commercial solar project? We provide permit-ready solar plan sets, PE-stamped engineering, structural calculations, electrical diagrams, and AHJ support to help you secure approval quickly and efficiently

What’s Included in Our Solar Permit Plans Package

Every solar permit plan set from Solar Permit Solutions is engineered to meet AHJ requirements on the first submission. Here is what you get with every order.

Permit-Ready Plan Sets

Our permit-ready plan sets are tailored to the specific requirements of your authority having jurisdiction (AHJ). Each set is formatted for fast intake by plan check staff, reducing back-and-forth and shortening your approval timeline. We include cover sheets, code references, system specifications, and all required drawings in a single organized package.

Electrical Single-Line Diagrams

We produce NEC-compliant single-line diagrams (SLDs) that document your system’s electrical architecture, including PV source circuits, combiners, inverters, disconnects, overcurrent protection, grounding, and utility interconnection points. Every SLD is reviewed against the current adopted electrical code for the project jurisdiction.

Site Plans & Equipment Layouts

Accurate site plans show the physical layout of all solar equipment on the property. We include roof or ground-mount array configurations, setback dimensions, equipment locations, and access pathways. Site plans are drawn to scale and match the information in your electrical diagrams.

Structural Calculations

Our licensed structural engineers perform load calculations to verify that the mounting system can withstand wind, snow, and seismic loads per the local building code. For roof-mounted systems, we assess rafter/truss capacity and point loading. For ground mounts, we calculate foundation sizing, uplift forces, and lateral loads.

PE Stamps & Engineering Review

A licensed professional engineer reviews every plan set before delivery. Residential and commercial projects in states requiring PE-stamped solar plans receive a wet or digital stamp from an engineer licensed in that state. Our engineering review covers both structural and electrical components.

Utility Interconnection Support

We prepare the interconnection documentation required by your utility, including system specifications, one-line diagrams formatted to utility standards, and equipment cut sheets. Our team has experience with interconnection requirements from investor-owned utilities, co-ops, and municipal utilities across all 50 states.

Why Solar Permit Plans Are Required

Before any solar installation can begin, most jurisdictions require the installer to submit a permit application that includes engineered solar permit plans. Here is why each layer of approval matters.

AHJ Approval Process

The authority having jurisdiction (AHJ), typically a local building or planning department, reviews solar permit plan sets to verify that the proposed system meets local building codes and zoning requirements. Plan sets must clearly show the system design, equipment specs, and installation method before a permit is issued.

Building Permit Requirements

Most residential and commercial solar installations require a building permit. The building department uses structural calculations and site plans to confirm that the mounting system will not compromise the structural integrity of the roof or foundation. Submitting incomplete or non-compliant documents is the leading cause of permit delays.

Electrical Code Compliance

Solar PV systems must comply with the National Electrical Code (NEC), including Article 690 for PV systems and Article 706 for energy storage. Electrical single-line diagrams document compliance with wiring methods, overcurrent protection, disconnecting means, rapid shutdown, and grounding requirements.

Utility Interconnection Requirements

Connecting a solar system to the grid requires utility approval in addition to the local building permit. Utilities review one-line diagrams and equipment specs to confirm that the system will not cause safety or power quality issues on their distribution network.

Residential Solar Permit Plans

We design permit plan sets for residential solar installations of all sizes and configurations. Whether you are installing a simple rooftop array or a full solar-plus-storage system with a main panel upgrade, our engineers will produce a permit package that gets approved.

• Roof-mounted solar arrays on shingle, tile, metal, and flat roofs
• Battery storage systems including AC-coupled and DC-coupled configurations
• Main panel upgrades (MPU) required for system interconnection
• Residential rapid shutdown (RSD) compliance per NEC 2017 and later
• Multifamily and accessory dwelling unit (ADU) installations

Typical residential permit packages include a site plan, electrical single-line diagram, structural calculations, equipment cut sheets, and a PE stamp where required by the AHJ. Our residential solar permit plans are formatted to match the intake requirements of the most common residential plan check portals, including eTRAKiT, e-Plan, ProjectDox, and Accela.

Commercial Solar Permit Plans

Commercial projects involve larger system sizes, more complex electrical infrastructure, and stricter AHJ scrutiny. Our commercial solar permit plans are engineered to meet the requirements of commercial building departments and utilities.

• Commercial rooftop solar on low-slope membrane roofs and standing seam metal roofs
• Ground-mounted commercial and utility-scale arrays
• Solar carport structures with structural engineering
• Large-scale systems with central inverters, string inverters, and microinverters
• Commercial battery energy storage systems (BESS)
• Commercial interconnection packages for net metering and export agreements

Every commercial solar permit package includes a full electrical design, structural engineering for the mounting system and any racking modifications, load calculations, and PE stamps on both the structural and electrical documents.

Ground Mount Solar Permit Plans

Ground-mounted solar systems require structural engineering that is fundamentally different from roof-mounted work. Our engineering team specializes in ground mount design and produces complete permit packages for residential, agricultural, and commercial ground mount installations.

Learn more: Ground Mount Solar Permit Plans

• Helical pier, ballasted, and driven post-foundation calculations
• Wind load analysis per ASCE 7 and local wind speed maps
• Seismic load assessment for applicable zones
• Soil bearing capacity review and foundation sizing
• Structural engineering for single-axis and fixed-tilt racking systems
• Ground mount PE stamp for both structural and electrical documents

PE-Stamped Solar Engineering

A PE stamp on your solar permit plans certifies that a licensed professional engineer has reviewed the design and takes professional responsibility for its compliance with applicable codes and standards. Our solar engineering plans and PE-stamped documents are accepted by AHJs and utilities in all 50 states. Many jurisdictions require PE stamps on residential and commercial solar permit applications.

Structural PE Stamps

Our structural PE stamps cover the mounting system design, rafter and truss load calculations, foundation design for ground mounts, and connection details. Structural stamps are provided by engineers licensed in the project state and are included with every plan set that requires them.

Electrical PE Stamps

Electrical PE stamps certify that the system’s electrical design complies with the NEC and applicable state electrical codes. Our electrical engineers review SLDs, wiring diagrams, equipment specifications, and interconnection details before stamping.

State-by-State PE Requirements

PE stamp requirements vary by state and sometimes by county or city. Some jurisdictions require PE stamps on all solar projects above a certain system size. Others require stamps only for commercial or ground-mount work. Our team tracks these requirements across all 50 states so your plan set always meets the local threshold.

Engineering Review Process

Every plan set goes through a two-stage engineering review: a junior engineer checks the design for completeness and code compliance, and a licensed PE performs the final review and applies the stamp. We do not release plan sets that have not passed both stages.

Common AHJ Requirements We Address

AHJ requirements differ significantly across jurisdictions, but most plan check comments fall into the same categories. Here is how we address the most common issues upfront.

AHJ Requirement	How We Address It
Structural verification	Full load calculations per ASCE 7 and local wind/snow maps, signed and stamped by a licensed structural PE
NEC compliance	SLDs and wiring diagrams reviewed against the adopted NEC edition for the project jurisdiction (2017, 2020, or 2023)
Rapid shutdown requirements	RSD compliance documented for arrays on buildings per NEC 690.12, with equipment specs and system block diagrams
Load calculations	Service entrance load calculations per NEC 220 for all residential MPU projects are included as standard
Battery permitting	Battery storage system permit packages including manufacturer specs, installation clearances, and ventilation requirements
Solar permit revisions	Unlimited revisions at no extra charge for AHJ comment responses on any plan set we produce

Why Choose Solar Permit Solutions

Solar installers and EPCs choose Solar Permit Solutions because we deliver accurate, permit-ready plan sets faster than any other solar permit design service in the country.

Fast Turnaround

Standard plan sets are delivered within 2 to 3 business days. Rush turnaround is available for time-sensitive projects. Our in-house engineering team handles every project; we do not outsource your designs.

Unlimited Revisions

If an AHJ requests changes to any plan set we produce, we revise the documents at no additional charge until the permit is approved. This applies to structural comments, electrical comments, and any documentation requests from the plan checker.

Nationwide Service

We provide solar permit plans in all 50 states. Our team tracks AHJ requirements, adopted code editions, and utility interconnection rules across every jurisdiction we serve. You get a plan set that matches your local requirements, not a generic template.

Licensed Professional Engineers

Every PE stamp on our plan sets is applied by an engineer with an active license in the project state. We maintain a roster of licensed PEs across all 50 states, including both structural and electrical disciplines.

Dedicated Permit Support

Your project is assigned a dedicated permit coordinator who handles communication with the AHJ on your behalf. If the plan checker has questions or requests additional documentation, your coordinator manages the response so you can stay focused on the installation.