Accelerating North America’s Clean Energy Transition with Precision Solar Engineering.

Fast, AHJ-compliant solar permit plan sets, PE Stamping, and CAD design for solar installers and EPCs across the United States and Mexico. NEC-compliant and guaranteed for first-time approval.

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About Company

From custom solar PV permit packages and EV charging layouts to multi-state PE stamping, NexaSun is the preferred engineering partner for North American solar contractors. We act as your in-house design team—reducing overhead, eliminating permit rejections, and accelerating your project pipelines.

500+

Projects Completed

99%

Uptime Guarantee

25+

Years of Engineering Excellence

150+

Trained Staff

Our Core Services

Solar Design and Permit Services

AHJ-Ready Solar Permit Plan Sets

We deliver complete, NEC-compliant solar permit plan sets tailored to your specific AHJ (Authority Having Jurisdiction) requirements in the US and SENER/CRE standards in Mexico. Includes site plans, single-line diagrams (SLD), and structural details.

50-State PE & Structural Stamping

Fast-track your installations with our network of licensed Professional Engineers. We provide Electrical and Structural PE stamping across the United States to ensure your projects pass local city and county reviews without delays.

EV Charging & Fire Safety Plans

Comprehensive EV charging design and permit plan sets for residential and commercial sites. We also specialize in rigorous fire safety setback planning to comply with the latest International Fire Code (IFC) and local municipal guidelines.

Comprehensive Solar Engineering & CAD Solutions

More Than Just Solar Permit Packages

Beyond standard residential permit packages, NexaSun provides a complete suite of outsourced clean energy engineering services. Whether you are a local roofing contractor expanding into solar, or a national EPC developing utility-scale projects across the US and Mexico, our team acts as your dedicated back-office. We deliver NABCEP-aligned, NEC-compliant designs—available as standalone drafting services or full end-to-end engineering packages optimized for rapid AHJ approval.

Why Choose NexaSun

Why High-Volume Solar Installers Partner With NexaSun

End-to-End Expertise

Design, installation, and long-term maintenance

Proven Reliability

High-efficiency systems built to last 15+ years

Tailored Engineering

Every system custom-designed for your needs

India-Ready Technology

Optimized for Any Global Climate & Irradiance Profile

Sustainable by Purpose

Accelerating the Global Clean Energy Transition

Integrity

Transparent pricing, honest advice, reliable delivery

Trusted by North America’s Leading Solar Teams

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Rated 4.5 out of 5

James Carter

NexaSun delivered our complete California residential permit plan set within 24 hours. The SLDs were clean, accurate, and approved by a very strict AHJ on the very first submission. They operate like our own in-house design team.

Rated 4 out of 5

Sarah Mitchel

London, UK
The quality of NexaSun’s CAD drawings is outstanding. Every layout and single-line diagram we receive is precise, professional, and ready to submit without any changes.

Rated 4.5 out of 5

David Reyes

We used to struggle with commercial permit rejections and structural engineering delays. Since routing our Texas and Mexico projects through NexaSun, our turnaround time has dropped massively. Their PE stamping service.