Owner's Engineer Services for Solar PV & Energy Storage Systems
Pure Power's Owner's Engineering division offers specialized engineering assistance for stakeholders such as investors, owners, and financiers involved in commercial and utility-scale renewable energy projects. Our dedicated owner's engineering team is critical in ensuring client success and optimizing profitability by providing expert guidance in technical risk management and comprehensive support throughout the project .
OE Services
Development Support
Project feasibility, PVsyst energy model review, interconnection assessment, vendor qualification, EPC and O&M support, commissioning plans, and design optimization.
Performance Validation
ASTM capacity testing, performance ratios, climate-adjusted actual vs. expected analysis, performance guarantees, recurring reports, and monitoring system configuration.
Acquisition Due-Diligence
Design and equipment evaluation, PVsyst modeling and third-party review, construction monitoring, testing and commissioning, project turnover, and asset performance analysis.
Quality Review
AC, DC, medium- and high-voltage electrical systems, racking and structural supports, monitoring systems, protective relaying, aerial thermography, and construction quality reviews.
PVSYST & Energy Models
PVsyst modeling and third-party review, performance guarantee calculations, climate-adjusted analysis, recurring performance reports, and monitoring system configuration.
Design & Equipment Review
Electrical, civil, and structural design reviews, equipment and vendor evaluation, PVsyst and energy model review, EPC contract technical review, and constructability assessment.
Featured Articles
How Owner’s Engineers Drive Efficiency and Quality in C&I Solar Projects
If you are looking to invest in Commercial & Industrial (C&I) solar + storage projects, you may have heard of ...
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Developing Bankable Solar + Storage Projects
To fund solar and energy storage projects, developers must first clear a lender’s bankability hurdle. In this context, ...
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Independent Engineering Versus Owner’s Engineering
When companies do not have in-house engineering—or when an independent third-party perspective is required—outsourcing ...
Read MoreAreas of Expertise
Distributed Generation - C&I
Engineering for commercial and industrial solar and BESS projects, supporting permitting, utility coordination, and design from development through construction.
Transmission - Utility-Scale
Engineering for utility-scale solar + BESS projects, supporting interconnection, system studies, utility coordination, and design through development and execution.
Ground Mounts
Engineering services for utility-scale and commercial ground-mounted solar systems, addressing grading, foundations, interconnection, and constructability.
Rooftops
Engineering solutions for rooftop solar projects, including structural evaluation, electrical design, code compliance, and constructible permit sets.
Carports
Integrated engineering for solar carports, combining structural, civil, and electrical design to deliver durable, code-compliant parking solutions.
Battery Energy Storage Systems
Engineering services for standalone and solar-paired battery energy storage systems, including system sizing, electrical design, interconnection, and code compliance.
Microgrids & Repowering
Engineering support for microgrids and repowering projects, optimizing system upgrades, integrations, performance, and long-term asset value.
When We Do It
The solar project life cycle encompasses five major stages. Each stage presents unique challenges, but stakeholders often overlook the value of continuity of knowledge that bridges all five project stages. That is where our OE team comes in.
- Early Issues are expensive to fix at later stages.
- Mistakes should be made on paper, not in the field.
- A high quality OE has technical and financial considerations in mind from day one.
Development
- Land Development
- Preliminary Design
- Finance Review
Design
- 30% Design
- 60% Design
- 90% Design
Build
- Issued
- Construction
- Mechanical Completion
- Substance Completion
Close
- Final Completion
Operator Looking to Sell
- Operating Project
- Operational Risk Review
- Finance Review
Why Choose Our Owner's Engineers?
OE Videos
Owner’s Engineering| Managing & Mitigating Risks
Owner's Engineering | Challenges & Adding Value to Solar + Storage Projects
Trusted by Leading Developers & EPCs
Eric Sieckmann
Penn Renewables
Hartman Hoel
Sunpeak
Peter Misthos
Nautilus Solar Energy, LLC
Case Study:
MW Portfolios in Illinois

Issues:
- Supply chain disruptions caused lead times to jump 40 weeks.
- New inverters did not have AC disconnects: sites can't comply with NEC 690.15 provisions for 10' rule.
Solutions:
- OE Team provided a method to utilize existing switchgear to meet the NEC 690.15 requirements.
Takeaways:
- Satisfies code without major redesign.
- Cost Impact was up to $50K Per Project.
Value Engineering Tips See More
Value Engineering in Solar + Storage - Why “One-Size-Fits-All” Doesn’t Work
Solar engineering is often seen as a simple exercise of cutting installation costs. In reality, far more is at stake. Value engineering is the process of reducing costs while carefully balancing impacts on quality, performance, and long-term..
Energy storage can be the “Swiss-army knife” of the electricity grid. Reports for more than a decade have demonstrated the value storage can provide. But now that states have moved from piloting energy storage to adopting it at scale, there is a..
The Most Common Carport Electrical Design Mistakes and How EPCs Can Eliminate Them
Solar carports may look deceptively familiar to rooftop or ground mount projects: steel, modules, inverters, conduits. But not so fast! Treating carports that way is one of the most direct paths to rework, delays, and uncomfortable conversations..
Simplify the Complex - Rethinking Standardization for Modern Solar Projects
Owners & developers want long-term performance. EPCs want to get steel in the ground and pass inspections.Between those two priorities lies the real challenge: how much of your project should be standardized, and when does customization pay off?
..
FAQ's
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What is Owner's Engineering, and who is it for?
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Owner's Engineering (OE) is independent technical support that represents the interests of the people funding and owning a renewable energy project — not the contractor building it. Pure Power's OE division serves investors, owners, and financiers on commercial and utility-scale solar and storage projects, providing technical risk management and support throughout the project lifecycle. It gives owners an expert set of eyes to protect their investment from development through operation.
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Can Pure Power provide technical due diligence for a solar or storage acquisition?
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Yes. Pure Power's acquisition due-diligence covers design and equipment evaluation, PVsyst modeling and third-party review, construction monitoring, testing and commissioning, project turnover, and asset performance analysis. This gives buyers and lenders a clear, independent picture of a project's technical condition and expected performance before they commit capital. It's designed to surface risks that could affect value.
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How does Owner's Engineering validate that a project performs as promised?
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Pure Power's performance validation includes ASTM capacity testing, performance ratio analysis, climate-adjusted actual-versus-expected comparisons, performance guarantee calculations, recurring reports, and monitoring system configuration. Together these confirm whether a system is producing the energy it was designed and financed to deliver. Owners can use the results to hold contractors accountable to performance guarantees.
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What does Pure Power inspect during quality review and inspection?
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Pure Power's quality review and inspection covers AC, DC, and medium- and high-voltage electrical systems, racking and structural supports, monitoring systems, and protective relaying, along with aerial thermography and construction quality reviews. Aerial thermography, for example, can spot underperforming or faulty modules that aren't visible on the ground. These reviews catch workmanship and equipment issues before they become costly operational problems.
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Can Pure Power review a project's design and EPC contract before construction?
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Yes. Pure Power provides electrical, civil, and structural design reviews, equipment and vendor evaluation, PVsyst and energy model review, EPC contract technical review, and constructability assessment. This independent review helps owners confirm the design is sound, the equipment is appropriate, and the contract terms are technically fair before construction begins. Catching problems at this stage is far cheaper than fixing them in the field.
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