When should a solar developer bring in an engineering firm?

Ideally before the interconnection application. Early engineering sets the POI strategy, sizes the system against interconnection limits and catches site constraints like wetlands, glare or soil issues while they are still cheap to solve. Pure Power supports developers from site screening through Notice to Proceed and construction.

What engineering is required for a solar interconnection application?

Most utilities and ISOs require a PE-sealed one-line or three-line diagram, a site plan, equipment data sheets and a technical package. Larger projects also need grid models such as PSCAD, PSS®E dynamic (.dyr) files or ASPEN OneLiner models. Pure Power prepares these submission-ready, with two revisions included, and can file the application on your behalf.

How long does solar interconnection take?

It varies widely by utility and ISO. According to Berkeley Lab’s Queued Up 2026 report, the median time from interconnection request to commercial operation was over five years for U.S. projects built in 2025. Engineering cannot shorten a utility’s study schedule, but complete, accurate packages avoid deficiency notices and restudies that add months.

What is the difference between preliminary engineering and Engineer of Record work?

Preliminary engineering covers early-stage design and analysis: layouts, single-lines for utility applications, glint and glare and energy models. Engineer of Record work is the licensed firm taking professional responsibility for the final design and stamping the construction documents. Pure Power does both, so nothing gets lost between development and construction.

Can Pure Power engineer both solar and battery storage projects?

Yes. We engineer standalone solar, standalone battery energy storage (BESS) and hybrid solar + storage projects, including DC-coupled systems, across C&I, community solar and utility-scale markets.

How do federal tax credit deadlines affect my engineering schedule?

Under the One Big Beautiful Bill Act, solar projects that did not begin construction by July 4, 2026 generally must be placed in service by December 31, 2027 to claim the 45Y or 48E credits. That compresses design timelines. We plan 30%, 60%, 90% and IFC milestones around your placed-in-service date. Confirm credit eligibility with your tax counsel.

Does Pure Power work with developers nationwide?

Yes. Pure Power holds PE licenses in 49 states and has engineered projects coast to coast from its Hoboken, NJ headquarters and regional offices in Sacramento, Denver, Houston and Overland Park, Kansas.

How is Pure Power different from a large multi-discipline engineering firm?

We only engineer solar and storage. Senior project managers stay on each project, and our 130+ in-house engineers give developers big-firm bandwidth with the responsiveness of a specialist.

Nationwide engineering for commercial and utility-scale solar + storage projects

For Solar + Storage Developers

Solar + Storage Engineering for Developers, from Site Control to Notice to Proceed

Interconnection packages, preliminary design and permit-ready Engineer of Record drawings from the team that has engineered 8.6 GW across 17,000+ projects. We help you de-risk early, protect your queue position and hand your EPC a design that builds.

Schedule a Meeting with Our Team See Developer Projects

Trusted by developers like Penn Renewables, Nautilus Solar and Telyon

A solar engineering firm does the technical work that turns a site into a financeable, buildable project: feasibility and preliminary layouts, energy models, interconnection documents and grid models, glint and glare studies, and PE-stamped construction drawings. Pure Power Engineering has done that work on more than 17,000 solar and battery storage projects, with 130+ in-house engineers and PE licenses in 49 states.

We only engineer solar and storage. That focus shows up in the details developers care about: single-line diagrams that utilities accept, PSCAD and PSS®E models built to each utility's requirements, and layouts that still pencil when module prices, tariffs or tax rules shift under you.

Highlighted Projects

C&I ROOFTOP

Pure Power Engineering provided a comprehensive suite of electrical, structural, and owner’s engineering services for a commercial rooftop solar installation in Southern California. The project required coordinated permit ready design, detailed structural analysis for rooftop loading, and full interconnection support under a low voltage, behind the meter configuration. Our team supported the project through advanced design milestones, ensuring alignment with utility requirements and construction readiness.

Project At a Glance:

Location: South Gate, CA
AC System Size: 550 kW
DC System Size: 588 kW
Utility: California Edison
Interconnection Voltage: Low Voltage (0 to 600V)
Interconnection Type: Behind the Meter
Scope of Services: Electrical Engineering, Structural Engineering, Owner’s Engineering

C&I ROOFTOP

Pure Power Engineering provided electrical design and forensic engineering services for a large scale commercial rooftop solar project in the Mid-Atlantic region. The system was designed as a front of meter installation interconnected at low voltage, requiring coordinated utility review and detailed engineering documentation through advanced design milestones. Our team supported the project with permit ready electrical design and technical oversight to help ensure compliance with local utility and jurisdictional requirements.

Project At a Glance:

Location: Baltimore, MD
AC System Size: 9,000 kW
DC System Size: 13,106.5 kW
Utility: Baltimore Gas and Electric
Interconnection Voltage: Low Voltage (0 to 600V)
Interconnection Type: Front of Meter
Scope of Services: Electrical Engineering, Owner’s Engineering

C&I ROOFTOP

Pure Power Engineering provided electrical engineering services for a multi megawatt commercial rooftop solar project in Kearny, New Jersey. The project was designed as a front of meter system interconnected at medium voltage, requiring technical coordination with Public Service Electric and Gas and detailed engineering documentation to support interconnection and construction. Our team delivered advanced design packages aligned with utility standards and project execution requirements.

Project At a Glance:

Location: Kearny, NJ
AC System Size: 3,600 kW
DC System Size: 4,949.1 kW
Utility: Public Service Electric and Gas (PSE&G)
Interconnection Voltage: Medium Voltage (601V to 35kV)
Interconnection Type: Front of Meter
Scope of Services: Electrical Engineering

RETAIL PORTFOLIO

Pure Power Engineering provided electrical, structural, and forensic engineering services for a nationwide portfolio of 50 commercial retail solar installations. Each project was designed as a behind the meter system, with interconnections ranging across multiple utility territories and jurisdictions.

Portfolio At a Glance:

Location: Nationwide
Typical AC System Size: ~1,080 kW
Typical DC System Size: ~1,322.78 kW
Interconnection Voltage: Medium Voltage (601V to 35kV)
Interconnection Type: Behind the Meter
Scope of Services: Electrical Engineering, Structural Engineering

Pure Power has been great to work with. Their response time is very quick and they were able to produce hundreds of layouts and single lines for us over the past 18 months.

Eric Sieckmann

Penn Renewables

Pure Power is a top tier partner and consultant in the solar space for both electrical and structural engineering. They are quick, accurate and reliable time and time again.

Peter Misthos

Nautilus Solar Energy, LLC

They’ve made tackling complex designs and navigating permitting challenges across multiple states feel easy, thanks to their attention to detail and problem-solving approach.

Robert Landino, PE

Telyon, LLC

When should a solar developer bring in an engineering firm?: Ideally before the interconnection application. Early engineering sets the POI strategy, sizes the system against interconnection limits and catches site constraints like wetlands, glare or soil issues while they are still cheap to solve. Pure Power supports developers from site screening through Notice to Proceed and construction.
What engineering is required for a solar interconnection application?: Most utilities and ISOs require a PE-sealed one-line or three-line diagram, a site plan, equipment data sheets and a technical package. Larger projects also need grid models such as PSCAD, PSS®E dynamic (.dyr) files or ASPEN OneLiner models. Pure Power prepares these submission-ready, with two revisions included, and can file the application on your behalf.
How long does solar interconnection take?: It varies widely by utility and ISO. According to Berkeley Lab’s Queued Up 2026 report, the median time from interconnection request to commercial operation was over five years for U.S. projects built in 2025. Engineering cannot shorten a utility’s study schedule, but complete, accurate packages avoid deficiency notices and restudies that add months.
What is the difference between preliminary engineering and Engineer of Record work?: Preliminary engineering covers early-stage design and analysis: layouts, single-lines for utility applications, glint and glare and energy models. Engineer of Record work is the licensed firm taking professional responsibility for the final design and stamping the construction documents. Pure Power does both, so nothing gets lost between development and construction.
Can Pure Power engineer both solar and battery storage projects?: Yes. We engineer standalone solar, standalone battery energy storage (BESS) and hybrid solar + storage projects, including DC-coupled systems, across C&I, community solar and utility-scale markets.
How do federal tax credit deadlines affect my engineering schedule?: Under the One Big Beautiful Bill Act, solar projects that did not begin construction by July 4, 2026 generally must be placed in service by December 31, 2027 to claim the 45Y or 48E credits. That compresses design timelines. We plan 30%, 60%, 90% and IFC milestones around your placed-in-service date. Confirm credit eligibility with your tax counsel.
Does Pure Power work with developers nationwide?: Yes. Pure Power holds PE licenses in 49 states and has engineered projects coast to coast from its Hoboken, NJ headquarters and regional offices in Sacramento, Denver, Houston and Overland Park, Kansas.
How is Pure Power different from a large multi-discipline engineering firm?: We only engineer solar and storage. Senior project managers stay on each project, and our 130+ in-house engineers give developers big-firm bandwidth with the responsiveness of a specialist.

Value Engineering Tips See More

Why Strong Solar Projects Fail: A Developer’s Guide to Interconnection Risk

by Pure Power Engineering | Posted in Commercial Solar, Interconnection Services

As a developer, you will look at solar or storage projects with excellent economics, presenting a strong investment opportunity. Yet such projects can still fail for one reason: interconnection. That’s exactly why Pure Power Engineering brought..

Continue Reading →

FEOC Compliance: Balancing Tax Credits and Energy Yield

by Pure Power Engineering | Posted in Utility Scale Solar, Commercial Solar

Your supply chain consultants and tax professionals have already helped you select your modules. Now you need an engineer who can design the system effectively within the constraints that selection creates. That’s our role at Pure Power Engineering...

Continue Reading →

Value Engineering Steel Pile Foundations for Utility-Scale Solar Projects

by Al Boudaqa, Ph.D, PE | Posted in Utility Scale Solar, Structural Engineering

In today's utility-scale solar market, developers, EPCs, and asset owners face increasing pressure to reduce project costs while maintaining long-term reliability and performance. One of the most significant opportunities for value engineering..

Continue Reading →

Value Engineering in Solar + Storage - Why “One-Size-Fits-All” Doesn’t Work

by Matthew Donovan, PE & Travis Lenberg, PE | Posted in Carport, PV, Commercial Solar

Value engineering is the process of reducing costs while carefully balancing impacts on quality, performance, and long-term outcomes. It’s much less about finding a single “optimal” solution and more about navigating a series of trade-offs that vary..

Continue Reading →

Book a Call

Solar + Storage Engineering for Developers, from Site Control to Notice to Proceed

What does a solar engineering firm do for developers?

The Development Math Changed. Your Engineering Should Too.

Where Development Engineering Pays for Itself

Interconnection deficiencies and restudies

Equipment changes mid-development

Energy models that don’t survive diligence

Permitting surprises from the AHJ

Storage added late in the game

A messy handoff to your EPC

Featured Articles

Engineering Support at Every Stage of Development

Site Screening + Feasibility

Interconnection

Energy Model + 30% Design

Permitting

Engineer of Record

Construction to COD

Developers Videos

Seismic Design for Solar Projects: What Developers & EPCs Need to Know

Training the Next Generation—The Pure Power Way

Highlighted Projects

C&I ROOFTOP

Project At a Glance:

C&I ROOFTOP

Project At a Glance:

C&I ROOFTOP

Project At a Glance:

RETAIL PORTFOLIO

Portfolio At a Glance:

What Developers Say About Pure Power

Eric Sieckmann

Peter Misthos

Robert Landino, PE

Why Developers Choose Pure Power

Frequently Asked Questions

Developing a Solar + Storage Project?

Value Engineering Tips See More

Why Strong Solar Projects Fail: A Developer’s Guide to Interconnection Risk

FEOC Compliance: Balancing Tax Credits and Energy Yield

Value Engineering Steel Pile Foundations for Utility-Scale Solar Projects

Value Engineering in Solar + Storage - Why “One-Size-Fits-All” Doesn’t Work

Contact Us

Pure Power Headquarters

Regional Locations

Quick Menu

Follow Us

Contact