OUR SERVICES
Utility-Scale Renewable
Energy Design
Power Designed. Power Delivered.
Leading the evolution of large-scale projects, Castillo Engineering delivers innovative electrical, civil, structural and substation design services nationwide.
Castillo Engineering is empowering utility-scale projects with innovative, customized, and process-driven engineering solutions across the entire project lifecycle – enhancing communication, shortening timelines and optimizing costs to deliver tomorrow’s energy with efficiency and ease.
Markets we serve
Developers
A one-stop-shop for engineering, we have honed our internal technologies and tools to increase efficiency and never lose sight of quality.
Owners, Utilities, IPPs
Through rigorous oversight and technical expertise, we ensure your investments are protected - delivering confidence through every phase of development.
EPCs
We provide tailored solutions across every phase of a project - from design to construction close-out - to ensure speed and efficiency throughout the project lifecycle.
Data Centers
Leveraging our expertise across electrical, structural, civil, and substation design, we ensure seamless support for your high-voltage engineering needs so you can focus on powering the digital world
WHY CASTILLO
Castillo Engineering is empowering utility-scale projects with innovative, customized, and process-driven engineering
Technology-First
We use advanced technology, including real-time dashboards and proprietary tools, to streamline workflows, boost efficiency, ensure transparency, and enable proactive decision-making for seamless execution.
Engineering Expertise
We have decades of combined experience in renewable energy engineering with over 10GWs of projects completed to date.
Process-Driven Quality
Castillo Engineering delivers precise, cost-effective designs with expert project management, leveraging proprietary tools to ensure quality, efficiency, and timely execution.
Long-Term Partner
Castillo Engineering builds lasting partnerships by aligning resources to deliver flawless execution, superior designs, and comprehensive project support with a client-focused approach.
Scalable
Castillo Engineering combines expertise, technology, and automation to scale efficiently, maintain quality, and streamline solar project execution while minimizing costs and delays.
Innovative Problem Solver
Castillo Engineering turns challenges into opportunities with innovative solutions, expert teams, and proactive problem-solving to keep projects on track and build trust.
Utility-Scale Renewable Energy Design Services
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Array layout optimization
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Major equipment location
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Module stringing
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Setbacks to include:
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Shading
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Equipment delivery pathways, laydowns, and turnarounds
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O&M access and pathways
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Integration of racking vendor’s specifications, requirements and limitations
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Equipment submittal review
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Point of Interconnection and/or Point of Common Coupling
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Construction notes and details
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Data and monitoring systems interface
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Module stringing
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Major engineered equipment BOM
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Line diagrams
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Circuit and raceway routing
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Voltage drop
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Conductor sizing
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Grounding and bonding
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Equipment submittal review
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Site preparation and land development support
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System architecture
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3D physical designs (e.g., elevations and general arrangement)
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Control enclosure (Control Panel Layouts)
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Relay, protection and control design
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Equipment specifications and Bill of Materials (BOM)
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Power System Studies
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Equipment submittal review
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Major engineered equipment BOM
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System layout
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Interconnection method
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Line diagrams
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Circuit and raceway routing
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Voltage drop
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Conductor sizing
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Grounding and bonding
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Equipment submittal review
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Reactive Power Studies
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Load Flow Studies
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Short Circuit Studies
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Protective Coordination Studies
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Arc Flash Studies
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Grounding Studies
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Underground Duct Bank/Cable Thermal Ampacity Studies
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Harmonic Studies
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Transient Studies
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Temporary Overvoltage (TOV) Studies
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Lightning Risk Assessment Studies
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Loss Studies
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Relay settings .RDB files
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Grading optimization
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Hydrology reports (pre and post)
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Stormwater Pollution Prevention Plan (SWPPP)
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Pile reveal mapping
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Permitting ownership and project management
IFC packages include but not limited to:
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Solar array optimization
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Grading optimization plan
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Parcel boundaries
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Easements
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Right of Way
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Setbacks to include:
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Wetlands
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Fence line
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Tree line
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Access, turnaround & roadways
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Equipment staging area
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Schematic layout of electrical equipment
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Incorporation of survey and topography
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Equipment submittal review
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Structural calculation reports
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Equipment pad design
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Electrical equipment racking design
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CAB system design
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Above ground cable management foundation design
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Racking system foundation design
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Equipment submittal review
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Request for Information
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Equipment submittal review and recommendations
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On-site evaluations and recommendations
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We are a project management-driven engineering firm. Our Project Management division, or Project Management Office (PMO), consists of experienced Project Managers. All of our Project Managers are certified by the Project Management Institute (PMI), a globally recognized organization that sets standards and provides best practices in the field of project management. Every PMO team member has earned PMI’s designation as a Project Management Professional (PMP). They have all taken courses and been certified in key project management subjects, including planning, execution, monitoring and controlling, communications, as well as cost, risk, quality, time and procurement management.