Solar Engineering & Permit Plan Sets for Residential and Commercial Projects
Daniel Solar Engineering provides residential, commercial, and utility-scale solar engineering services for contractors, builders, developers, solar installers, and property owners across the United States. We produce permit-ready solar plan sets, PE-stamped engineering drawings, structural and electrical reviews, utility interconnection documentation, EV charging designs, and engineering support from initial system layout through permit approval. With extensive experience navigating California permitting requirements and the ability to support projects nationwide, we deliver accurate, code-compliant engineering that helps keep projects moving.
Nine services, one licensed team.
From the first shading model to the final stamped drawing, every deliverable is created in-house—not from a generic template with your logo added.
PV System Design
Comprehensive PV layouts including production modeling, string sizing optimization, and high-yield engineering for residential and commercial roof or ground-mount systems.
Learn more →Permit Plan Sets & PE Stamps
Jurisdiction-ready drawing packages—including full site plans, structural attachment details, and electrical schematics—stamped by licensed Professional Engineers (P.E.) nationwide.
Learn more →Structural & Electrical Review
Rigorous engineering evaluation verifying dead/live/wind load calculations, conductor ampacity sizing, voltage drop mitigation, and single-line/three-line diagrams built to pass local AHJ scrutiny.
Learn more →Interconnection & Utility Applications
End-to-end management of utility interconnection requests, net energy metering (NEM) submittals, and distributed generation compliance to secure Permission to Operate (PTO) fast.
Learn more →Commercial & Utility-Scale Design
Advanced engineering for commercial rooftop, solar carport, and ground-mount systems ranging from 100 kW installations up to complex multi-megawatt distribution-level arrays.
Learn more →EV Charging Design & Engineering
Electrical load calculations, panel upgrade design, and complete civil/electrical engineering plan sets for commercial Level 2 and Level 3 DC Fast-Charging (DCFC) infrastructure.
Learn more →Electrical Design
Permit-ready residential electrical design and panel upgrade engineering for homes, ADUs, additions, remodels, and service upgrades.
Learn more →Five steps from intake to inspection.
Our streamlined workflow delivers code-compliant solar drafting and structural analysis tailored to your specific project. Every engineering package is optimized to meet local AHJ building codes, NEC standards, and strict utility interconnection rules to minimize redlines and accelerate permit approval.
Technical Project Intake
Submit initial project parameters, structural site photos, utility billing histories, or preliminary roof layouts via our secure onboarding system to establish a precise engineering baseline.
GIS & LIDAR Site Analysis
We utilize high-resolution aerial imagery, regional GIS data datasets, and advanced LIDAR terrain mapping to remotely audit structural obstacles, roof tilt, true azimuth, and shading profiles.
Engineering & CAD modeling
Our team generates detailed PV production models and drafts full layout schematics in AutoCAD, performing rigorous conductor sizing calculations, voltage drop mitigation, and structural load studies.
PE-Stamped Plan Set Delivery
Receive a complete, jurisdiction-ready permit drawing package in high-resolution PDF and native AutoCAD DWG formats, in 24 to 48 hours.
AHJ Correction & Correction Support
We provide comprehensive post-delivery support, executing rapid plan-checker redline revisions, addressing utility technical requests, and clearing local building department corrections at no additional cost.
Engineering support wherever the panels go up in California.
Every project follows the same proven quality-control process, no matter which California county your project sits in—so a rooftop in San Diego and a carport in San Francisco get the same rigor, the same turnaround window, and a stamp that’s valid where it’s needed.
Have a project that's ready for permit?
Frequently Asked Questions About Solar Engineering & Permit Plan Sets
Answers to what contractors, builders, and property owners most often ask before starting a project with us. Don't see what you need? Reach out directly.
01 What solar engineering services do you provide?
Daniel Solar Engineering provides complete solar engineering and permit plan services for residential, commercial, and utility-scale projects throughout the United States. Our services include solar permit-ready plan sets, single-line diagrams, structural engineering, electrical engineering, PE-stamped drawings (when required), load calculations, equipment layouts, utility interconnection documentation, battery storage engineering, EV charging design, and engineering support from project intake through permit approval.
02 What is included in a solar permit plan set?
Our permit-ready solar plan sets are customized to meet the requirements of your local building department and utility company. Depending on the project, a complete plan set may include:
- Site and roof layout drawings
- Single-line electrical diagrams
- Equipment specifications
- Structural and electrical calculations
- Load calculations
- Attachment and mounting details
- Required code compliance notes
- Complete material and equipment schedules
- Utility and permitting documentation
Every project is prepared to help streamline the permitting process and reduce review comments.
03 Do your solar plan sets include PE stamps?
Yes. We can provide Professional Engineer (PE) stamps whenever they are required by your local jurisdiction or requested for your project. Our team works with licensed engineers to provide structural and electrical engineering review and stamped drawings that meet local permitting requirements.
04 How long does it take to complete a solar engineering project?
Most residential solar engineering projects are completed within approximately one business day. Larger commercial or more complex systems typically require between 24 and 48 hours, depending on project size, engineering requirements, and the completeness of the information provided. Our goal is always to deliver accurate, permit-ready plans as quickly as possible without compromising quality.
05 What information do you need to start a project?
The information required depends on the type of project.
For new construction projects, we typically request:
- Complete construction plan set
- Equipment specifications
- Material information
- Project address
For existing homes or buildings, we typically request:
- Property address
- Electrical panel photographs
- Roof information (if available)
- Equipment specifications
- Site photos when applicable
Providing complete information upfront helps us reduce turnaround time and avoid permit delays.
06 Do you provide residential, commercial, and utility-scale solar engineering?
Yes. We provide solar engineering services for residential homes, commercial buildings, multifamily developments, industrial facilities, and utility-scale solar projects. Our engineering team supports projects ranging from small rooftop systems to large commercial and ground-mounted solar installations.
07 What states and locations do you serve?
We proudly provide solar engineering services in all 50 states. While we support projects nationwide, our team has extensive experience with California permitting requirements, including California Title 24 compliance, utility requirements, and local Authority Having Jurisdiction (AHJ) standards.
08 Do you provide structural and electrical engineering for solar projects?
Yes. When required, we provide both structural and electrical engineering services, including structural calculations, electrical load analysis, single-line diagrams, and Professional Engineer (PE) stamped drawings to meet local building department requirements.
09 Can you revise plans if the building department or utility requests changes?
Absolutely. If your building department or utility company requests revisions during the permit review process, our team will make the required corrections at no additional cost. We work closely with our clients to help move projects through permitting as efficiently as possible.
10 Do you handle utility interconnection applications and PTO documentation?
Yes. We prepare utility interconnection documentation and Permission to Operate (PTO) paperwork required by many utility providers. Our team helps ensure the necessary engineering documentation is complete for utility submission.
11 Can you engineer battery storage and EV charging systems?
Yes. We provide engineering and permit plan services for battery energy storage systems (BESS) and electric vehicle (EV) charging installations. Our team can incorporate battery storage, backup power systems, and EV charging equipment into your solar project while meeting applicable electrical and permitting requirements.
12 Who do you work with?
We work with a wide range of clients across the solar industry, including:
- Solar contractors
- General contractors
- Home builders
- Developers
- EPC companies
- Electrical contractors
- Architects
- Engineers
- Property owners
- Homeowners
Whether you're managing one project or hundreds of installations each year, we can provide reliable engineering support.
13 How do you ensure your plans meet local building and electrical codes?
Every project is reviewed by experienced solar designers who work in accordance with the latest National Electrical Code (NEC), applicable building codes, and local permitting requirements. When required, licensed Professional Engineers review and stamp the plans to ensure compliance with the applicable jurisdiction before submission.
14 Can you design rooftop, ground-mounted, and carport solar systems?
Yes. Our team designs rooftop, ground-mounted, canopy, and solar carport systems for residential, commercial, and utility-scale applications. Every design is customized to maximize performance while meeting structural, electrical, and permitting requirements.
15 Why should I choose Daniel Solar Engineering?
Daniel Solar Engineering is committed to delivering accurate, permit-ready solar engineering with competitive pricing and fast turnaround times. Our experienced team understands the permitting process, works closely with licensed Professional Engineers, and focuses on producing high-quality engineering packages that help contractors, builders, and developers keep projects moving. From residential rooftop systems to large commercial installations, we strive to provide responsive service, dependable engineering, and long-term support throughout the permitting process.
16 How much do your solar engineering and permit plan services cost?
Pricing varies depending on the project size, system complexity, engineering requirements, jurisdiction, and whether structural or electrical PE stamps are required. We provide customized quotes to ensure you receive the engineering services that best fit your project's scope and budget.
17 What is your engineering and permitting process from start to finish?
Our process is designed to make permitting simple and efficient:
- Submit your project information and required documents.
- Our design team reviews the project requirements.
- We prepare the solar layout, electrical design, and engineering documentation.
- Structural and electrical engineering review and PE stamping are completed when required.
- We deliver a complete permit-ready solar plan set.
- If revisions are requested by the building department or utility company, we provide the necessary corrections to help your project receive approval.
18 How do I get started with my solar engineering project?
Getting started is easy. Simply send us your project information by email or through our contact form.
For existing properties, please include:
- Property address
- Electrical panel photos
- Roof information (if available)
- Equipment specifications
- Site photos when available
For new construction projects, please include:
- Complete construction plan set
- Equipment specifications
- Material information
- Project address
19 What structural wind and snow load standards do your engineering calculations follow?
Our structural engineering team calculates all roof and ground-mount layouts using active ASCE 7-16 and ASCE 7-22 structural criteria. We evaluate dead loads, live loads, ground snow loads, and local wind speed adjustments up to 180 mph to ensure full compliance with the International Residential Code (IRC) and International Building Code (IBC) guidelines dictated by your local building department.
20 Do you design electrical single-line and three-line diagrams to specific NEC code cycles?
Yes. We draft all electrical schematics, including single-line (SLD) and three-line diagrams, to match the exact code cycle adopted by your local Authority Having Jurisdiction (AHJ). Our designs seamlessly incorporate NEC 2017, NEC 2020, or NEC 2023 compliance parameters, explicitly detailing conductor ampacity sizing, voltage drop mitigation, overcurrent protection device (OCPD) coordination, and rapid shutdown system specifications.
21 Can your team handle battery energy storage system (BESS) and EV charging integration in the same plan set?
Absolutely. We specialize in complex, multi-asset drafting that integrates PV generation with battery energy storage systems (BESS) and Level 2 or Level 3 DC Fast-Charging (DCFC) infrastructure. Our engineering packages include comprehensive electrical load aggregation, panel upgrade designs, and utility service capacity evaluations required for multi-source clean energy submittals.
22 In what software environments do you draft your engineering packages, and what files do I receive?
All permit plan sets and engineering drawings are designed natively within professional AutoCAD environments. Upon project completion, we deliver high-resolution vector PDF files alongside native AutoCAD DWG and DXF files. This ensures your project files plug perfectly into your in-house project management pipeline and are fully ready for digital AHJ portal submittals.
23 How do your plan sets comply with specialized California building mandates?
For all projects located across Southern California and statewide, our designs are optimized for rapid Title 24 compliance, including mandatory solar-plus-storage integration for new construction pathways. We are intimately familiar with local municipal utility rules (such as LADWP, SCE, and SDG&E) and design our plan sets to easily clear strict local California AHJ amendments.
24 Do you design residential electrical plans and panel upgrades separate from solar projects?
Yes. In addition to solar engineering, we provide standalone residential electrical design and electrical panel upgrade design for homes, ADUs, additions, and remodels—independent of whether a project includes solar. This includes panel schedules, single-line diagrams, service sizing, and load calculations prepared to meet NEC and local AHJ requirements.