State-Certified Engineering Stamps That Get Your Permits Approved — Fast

Every solar project faces one critical permitting requirement: Professional Engineering certification.

Without a PE stamp, your permit application sits in limbo. With the right PE stamp, from a properly licensed engineer in the correct state, your project moves forward confidently toward approval.

At Solartro, we provide licensed PE stamping services across all 50 U.S. states—both structural and electrical—ensuring your solar, battery, and generator installations meet every code requirement and pass AHJ review the first time.

From residential rooftops to multi-megawatt commercial projects, our PE-stamped plans are backed by licensed engineers who understand your state's requirements and deliver certifications that authorities trust.

Fast turnaround. Nationwide coverage. Trusted engineering review.

What's Included in Solartro PE Staping Services

We provide complete Professional Engineering review and certification for all aspects of your solar project.

Our licensed engineers perform a thorough review and certification of your solar plans, including:

Structural PE Stamping

Roof attachment & rafter spacing verification
Wind, snow, dead & live load calculations
Ground-mount foundation & anchoring review
Racking & mounting system compliance
Structural letters & certifications (when required)

Electrical PE Stamping

NEC-compliant electrical plan review
Single-Line Diagram (SLD) & Three-Line Diagram (3LD)
Inverter, battery & generator interconnection method review
Grounding, bonding & protection analysis
Utility-facing electrical compliance documentation

Stamps & Documentation

Wet or digital PE stamps
Engineering calculation packages
Structural & electrical compliance letters
Post-installation / as-built certification support

🗺️ ALL 50 STATES COVERAGE

Solartro maintains relationships with licensed Professional Engineers in every U.S. state.

Why State-Specific Licensing Matters:

Most AHJs require PE stamps from engineers licensed in their specific state. A PE licensed in California cannot stamp plans for a project in Florida—the stamp would be rejected.

Our PE Network Includes:

✅ Licensed Structural Engineers (SE) where required (California, Texas , Florida, Illinois, Hawaii, Nevada, Oregon, Utah, Washington etc)
✅ Licensed Electrical Engineers (some states require EE license for electrical stamps)
✅ Multi-state licensed PEs (engineers holding licenses in multiple states for border regions)
✅ Specialized engineers (battery storage, ground-mount, commercial/industrial, utility-scale)

Who needs PE Stamping services?

✅ Residential Solar Installers — Most states require PE stamps for residential systems over 10-25 kW
✅ Commercial Solar EPCs — PE stamps nearly always required for commercial/industrial projects
✅ Ground-Mount Developers — Structural PE stamps mandatory for foundation engineering
✅ Battery Storage Installers — NFPA 855 and NEC 706 compliance often requires PE review
✅ Solar Brokers & Consultants — Provide clients with PE-certified designs for credibility
✅ Out-of-State Installers — Working in a new state? We have local PE connections
✅ DIY Solar Builders — Homeowners permitting their own systems need PE stamps

From 3 kW residential rooftop to 100 MW solar farm, if it needs a PE stamp, Solartro delivers.

Frequently Asked Questions

When is a PE stamp required?

Requirements vary by state and jurisdiction. Generally required for:

Commercial/industrial systems (almost always)
Residential systems over 10-25 kW (varies by state)
Ground-mount installations (structural PE required)
Older buildings or unusual roof structures
Battery storage systems (in many jurisdictions)
Projects in high-wind or high-seismic zones

What's the difference between structural and electrical stamps?

Structural stamps certify the system can safely support loads (wind, snow, weight). Electrical stamps certify the wiring, grounding, and interconnection meet NEC and local codes. Some projects need both

Can I use a PE licensed in a different state?

Generally NO. Most AHJs require stamps from engineers licensed in their specific state. We provide state-specific PE stamps to avoid rejections.

What's the difference between a "wet stamp" and a "digital stamp"?

Wet stamp = original ink signature and embossed/raised seal on paper. Digital stamp = electronic seal embedded in PDF. Most AHJs now accept digital stamps; some still require wet stamps (we provide both).

How much does PE stamping cost?

Pricing varies by project complexity, system size, and stamp type. Contact us for custom quotes. Volume discounts available for installers with recurring needs

Can you stamp plans designed by another company?

Yes! We can review and stamp plans created by any design firm, as long as they're complete and code-compliant. If corrections needed, we'll coordinate with you.

What if the AHJ rejects the stamped plans?

Rare, but if rejection is due to PE error (not scope changes), we coordinate free re-stamp with corrections. Our thorough review process minimizes rejection risk.

How fast can you deliver a PE stamp?

Standard: 18-24 hours. Expedited: 12 hours (with rush fees). Bulk projects: Custom SLA timelines.

Do you provide stamps for battery storage and generators?

Yes! Our PE network includes engineers specialized in energy storage (NEC 706, NFPA 855) and backup power systems (NEC 702).

What if my project is in multiple states (utility-scale solar farm)?

We coordinate PE stamps for multi-state projects, providing appropriately licensed engineers in each jurisdiction.

PE Stamping