Grid Connection & Interconnection
Expert engineering for seamless interconnection to transmission and distribution networks.
Speak to UsGrid Connection & Interconnection Services
Ensuring Reliable, Compliant, and Efficient Ties to the GridOverview of Interconnection Process
On Grid Engineering specializes in guiding generation assets—solar, wind, hybrid, and storage—through the complex interconnection process. We handle everything from initial feasibility to final energization, coordinating with utilities, system operators (ISO/RTO), and regulatory bodies to ensure successful grid integration.
Feasibility Studies & System Impact Analysis
Before committing capital, our team performs rigorous feasibility studies to assess:
- Load flow impacts on transmission and distribution networks
- Voltage regulation and stability concerns
- Equipment overload, short-circuit duty, and protection coordination
- Interim and long-term system modifications required
Our detailed System Impact Analysis (SIA) provides a clear roadmap of technical requirements, interconnection costs, and anticipated timelines.
Interconnection Agreement & Contract Support
Negotiating interconnection agreements is often time-consuming. Our experts assist clients by:
- Reviewing and drafting Large Generator Interconnection Agreements (LGIA) or Small Generator Interconnection Agreements (SGIA)
- Identifying commercial terms, milestones, and milestones for study phases
- Advising on security deposits, scheduling, and financial obligations
- Coordinating with utilities and legal teams to expedite approvals
Detailed Engineering & Design
Once feasibility is confirmed, our team delivers comprehensive medium-voltage electrical design solutions tailored for utility-scale solar, wind, and BESS projects:
- MV System Design: Cable sizing, routing, voltage drop analysis, and protection coordination tailored to project scale and performance.
- Protection & Coordination Studies: Relay settings, fuse sizing, breaker coordination, and fault analysis.
- Transmission & Feeder Layout: Feeder routing, conductor selection, trenching/overhead evaluation, and thermal ampacity analysis.
- Power System Studies: Load flow, short circuit, grounding, arc flash, and reactive power studies for grid compliance.
- Power Quality & Harmonic Analysis: Assessments for flicker, THD, and voltage stability to meet utility standards.
Permitting & Regulatory Compliance
Our regulatory specialists manage all permitting processes, including:
- Environmental Impact Assessments (EIA)
- National Environmental Policy Act (NEPA) documentation
- State and local land use, zoning, and right-of-way permits
- Federal Energy Regulatory Commission (FERC) filings, where applicable
- Coordination with utility compliance teams and local authorities
Construction Management & Commissioning Support
We provide expert oversight during construction and commissioning to ensure safe, compliant, and on-time delivery for PV, BESS, and MV electrical systems:
- Construction sequencing and site logistics planning for AC and DC systems
- MV cable installation QA/QC inspections, termination checks, and as-built validation
- DC cable installation QA/QC, polarity verification, and insulation resistance testing
- Protection system testing: relay settings, breaker verification, and functional validation
- Commissioning plans, punchlist tracking, and test report documentation
- Inverter startup support and DC system energization coordination
- Handover packages and technical training for O&M teams
Post-Connection Engineering Support
After energization, we continue to support project performance and compliance through targeted engineering services:
- Performance issue troubleshooting and root cause analysis
- Grid compliance reviews and interconnection study updates (e.g., IRR revisions, reactive power compliance)
- Power system model updates (PowerFactory, PSSE, ETAP, etc.)
- Design revisions for equipment replacements or system changes (e.g., inverter updates, feeder reconfiguration)
- Study updates in response to regulatory changes, utility feedback, or site modifications
Future-Proofing Grid Assets
We support long-term grid reliability by helping clients adapt to evolving technologies, regulations, and load growth:
- BESS integration planning for congestion relief, arbitrage, and peak shaving
- MV system design flexibility to accommodate future capacity expansions
- Interconnection study updates driven by regulatory or system changes
- Power system studies to evaluate repowering, retrofits, or capacity expansion
- Stakeholder technical support to address utility feedback and community concerns