01Project overview & context
Overview
Project summary
SgurrEnergy is providing Owner’s Engineering design review for Intersect Power’s Roman utility-scale solar PV project in the United States, rated at 700 MWdc / 500 MWac. The assignment covers electrical design reviews at the 30%, 60%, 90%, IFC and as-built stages, together with independent assessment of engineering packages, studies and technical documentation. Reviews address layout, calculations, specifications, load flow, short circuit, protection coordination, neutral-induced voltage, ampacity and grounding. A structured risk matrix and comment-closure workflow support rapid milestone decisions.
Project context
Roman is a large utility-scale solar PV project comprising multiple array areas and major collection and interconnection interfaces. Intersect Power required an independent Owner’s Engineering function capable of reviewing evolving design packages through successive maturity gates. The assignment therefore combines technical assurance, power-system study review, risk prioritisation, interface management and disciplined closure of engineering comments.
Client objectives
- Provide independent assurance across each design-maturity gate.
- Identify and prioritise material electrical and interface risks.
- Review power-system studies and technical documentation.
- Maintain rapid, predictable review cycles.
- Support informed decisions through IFC and as-built completion.
Key challenges & considerations
Scale and Interface Density
A 700 MWdc / 500 MWac plant creates numerous array, collection, substation and interconnection interfaces requiring consistent design assumptions.
Milestone-Based Review
30%, 60%, 90%, IFC and as-built submissions require clear review criteria and traceable closure.
Power-System Risk
Load flow, short circuit, protection, ampacity, grounding and neutral-induced-voltage studies require coordinated assessment.
02Engineering scope & delivery
Role & engineering approach
Independent engineering role
SgurrEnergy’s role
SgurrEnergy acted as the Owner’s Engineering consultant for the 500 MWac / 700 MWdc Solar PV project in the United States. The team coordinated the relevant engineering disciplines, technical interfaces, studies, design documentation and stakeholder inputs across the assignment lifecycle. The role was structured to improve technical clarity, compliance, constructability and traceable closure of design matters.
Our engineering approach
SgurrEnergy applied a multidisciplinary, interface-led approach based on a common design basis, defined review gates and traceable technical closure. Engineering inputs were assessed not only within individual disciplines but also for their effects on adjacent systems, constructability, procurement and grid integration. Technical comments and risks were prioritised, assigned and closed through structured coordination with the client and relevant project stakeholders.
Scope of services & deliverables
Scope of services delivered
- Electrical design review at 30%, 60%, 90%, IFC and as-built stages.
- Layout, calculation and technical-specification review.
- Load-flow and short-circuit study review.
- Protection-coordination, ampacity and grounding review.
- Neutral-induced-voltage assessment review.
- Risk-matrix, comment-log and closure-workflow management.
Principal deliverables
- Design-review reports for each maturity gate.
- Decision-making risk matrix.
- Power-system study review memoranda.
- Engineering comment logs and closure registers.
- Technical-document review outputs.
- IFC and as-built review records.
Project configuration
- 700 MWdc / 500 MWac utility-scale solar PV project.
- Multiple solar array areas and collection-system interfaces.
- Milestone-gated engineering review process.
03Value & outcome
Accelerated Development
Accelerated project development through rapid milestone-based reviews.
Risk Prioritisation
Clear prioritisation of critical design risks using a structured risk matrix.
Comment Traceability
Improved traceability of technical comments and closure decisions.
Informed Decision-Making
Supported informed stakeholder decision-making throughout the engineering lifecycle.
Project outcome
The assignment provided Intersect Power with coordinated engineering and technical-review outputs for the 500 MWac / 700 MWdc project. SgurrEnergy’s work strengthened design clarity, interface management and implementation readiness while supporting informed decisions across the relevant project stages.
Why SgurrEnergy
- Independent engineering judgement, separate from EPC, OEM and equipment-supply interests.
- In-house multidisciplinary renewable-energy engineering capability.
- Structured technical governance, interface management and comment closure.
- Experience connecting design decisions with constructability, grid compliance and lifecycle performance.