128 City Road, London
02035763630

Grid Connection Services 

Navigating the UK's complex grid connection process can be challenging. Our expert team guides you every step of the way from initial site assessment to final connection ensuring efficient and compliant integration with the National Grid and Distribution Networks.

Our Owner's Engineer services act as your independent technical expert, ensuring your project's grid and electrical infrastructure meets all regulatory and operational standards throughout development and construction.

  • Network Capacity & Site Viability Assessments: We analyse grid capacity and network constraints across UK regions to identify the most feasible sites for your project.
  • Pre-Application Grid Connection Design: Developing detailed, optimised grid connection proposals aligned with your project's technical and commercial needs.
  • Application Preparation & Submission: Handling all necessary applications, including BCA (Bilateral Connection Agreement), BEGA (Bilateral Embedded Generation Agreement), BELLA (Bilateral Embedded Large Load Agreement) with NGESO, and G99 connection applications with Distribution Network Operators (DNOs).
  • Grid Offer Evaluation: Reviewing formal connection offers issued by NGESO and DNOs for viability, technical requirements, and commercial conditions.
  • Grid Offer Analysis & Recommendations: Providing clear, expert advice on acceptance, negotiation strategies, or alternative approaches to maximise project success.
  • Stakeholder Liaison & Query Resolution: Managing all communications with NESO, Transmission Operators (TOs), and DNOs to promptly address technical clarifications or challenges related to grid connection offers.
  • Grid Offer Review & Technical Support: Interpreting complex grid offers and advising on Point of Connection (POC), contestable works, and interface requirements with DNOs and TOs.
  • Coordination with Network Operators: Managing technical discussions on connection points, substation siting, and system integration to ensure smooth delivery.
  • Conceptual Design & Engineering: Creating Single Line Diagrams (SLDs), substation layouts, and associated infrastructure designs that align with grid connection parameters and site constraints.
  • Substation & Cable Routing Plans: Providing detailed layouts and elevation drawings, including EHV cable routing for surveys, planning, and site investigations.
  • Contractor Selection & Management Support: Assisting in appointing contractors for EHV cable surveys and other pre-planning activities, and obtaining budgetary quotes from Independent Connection Providers (ICPs) for contestable works and civil engineering packages.
  • ICP & IDNO Appointment and Contract Management: Leading negotiations on scope, costs, and timelines with licensed ICPs and Independent Distribution Network Operators (IDNOs).
  • Power System Studies & Compliance: Conducting essential studies and ensuring regulatory compliance, documentation, and reporting are complete and up to date.

Solar Farm Design & Engineering 

NexaGrid delivers end-to-end design solutions for utility-scale and commercial solar PV projects, ensuring every system is technically sound, fully compliant, and optimised for maximum long-term performance. Our designs integrate engineering precision, regulatory compliance, and construction practicality, giving you a blueprint that's ready for both planning approval and efficient on-site delivery.

We take a holistic approach to solar farm design from irradiation studies and feasibility assessments, through detailed electrical and civil engineering, to integration with monitoring and control systems. Every design is tailored to site-specific conditions, DNO requirements, and financial objectives, ensuring a project that performs optimally over its lifetime


  • Feasibility & Resource Assessment: Bankable solar irradiation analysis using Tier 1 datasets (Meteonorm, Solargis, PVGIS). Shading analysis using PVcase and PVsyst to account for topography, obstacles, and seasonal effects. Initial energy yield forecasts to inform financial modelling and investment decisions
  • Concept & Planning Stage Designs: Initial site layout optimised for land usage, topography and cable routing. Preliminary electrical design for DC and AC systems, including inverter and string configurations. Conceptual substation location & grid interface planning. Civil and structural layouts, including access roads, drainage, and mounting systems. Planning documentation support, aligned with local council requirements
  • Detailed Design & Engineering: PVcase & AutoCAD layouts for accurate positioning of modules, trackers, and inverters. Detailed section layouts showing terrain-following designs where needed. DC & AC electrical design up to Point of Supply (POS), including cable sizing and routing plans. Earthing & lightning protection layouts to BS EN and IEC standards. CCTV & security fence layouts for site safety and regulatory compliance. Single Line Diagrams (SLDs) for all voltage levels. SCADA and monitoring system design, including network architecture and data integration. Cable management solutions — underground, above-ground, and hybrid routing plans 
  • Feasibility & Resource Assessment: Bankable solar irradiation analysis using Tier 1 datasets (Meteonorm, Solargis, PVGIS). Shading analysis using PVcase and PVsyst to account for topography, obstacles, and seasonal effects.Initial energy yield forecasts to inform financial modelling and investment decisions
  • Concept & Planning Stage Designs: Initial site layout optimised for land usage, topography and cable routing. Preliminary electrical design for DC and AC systems, including inverter and string configurations. Conceptual substation location & grid interface planning. Civil and structural layouts, including access roads, drainage, and mounting systems. Planning documentation support, aligned with DNO, National Grid, and local council requirements
  • Detailed Design & Engineering: PVcase & AutoCAD layouts for accurate positioning of modules, trackers, and inverters. Detailed section layouts showing terrain-following designs where needed. DC & AC electrical design up to Point of Supply (POS), including cable sizing and routing plans. Earthing & lightning protection layouts to BS EN and IEC standards. CCTV & security fence layouts for site safety and regulatory compliance. Single Line Diagrams (SLDs) for all voltage levels. SCADA and monitoring system design, including network architecture and data integration. Cable management solutions — underground, above-ground, and hybrid routing plans
  • Performance Optimisation & Compliance: PVsyst simulations with shading loss factors from PVcase for accurate PR estimates. IEC, BS EN, G99/G100 compliance checks for seamless DNO acceptance. Component selection optimised for efficiency, durability, and OPEX reduction. Support for bankability studies, lender technical advisor reviews, and Owner's Engineer audits
  • Construction Support: Issuing for-construction drawings and technical specifications. Technical liaison with Independent Connection Providers (ICPs) and EPC contractors. On-site support for design validation and as-built documentation

Wind Farm Design & Engineering

At NexaGrid, we deliver end-to-end design and engineering solutions for onshore wind projects, guiding developers from early feasibility through to construction and commissioning. We combine technical precision, practical buildability, and deep regulatory expertise to ensure your project meets its performance, compliance, and investment goals. Using industry-standard software such as WindPRO and Windographer, we provide bankable wind resource assessments and design optimisations that maximise energy yield while ensuring adherence to environmental, planning, and grid requirements.

Our integrated approach covers every discipline — civil, electrical, and operational — giving you a single, trusted technical partner from first concept to operational handover.


  • Feasibility & Site Assessment: Long-term wind speed analysis from on-site measurements, LiDAR, SoDAR, or met masts. Data validation and correlation with historical datasets using Windographer. Bankable energy yield assessment with full loss factor breakdown in WindPRO. Site screening for planning constraints, access routes, and grid availability. Initial turbine layout concepts considering terrain, turbulence, and wake effects
  • Concept & Planning Stage Design: Micro-siting optimisation to maximise production and reduce wake losses. Noise, shadow flicker, and visual impact studies to meet UK planning guidelines. Preliminary electrical designs for internal collection network and export connection. Concept layouts for crane pads, access tracks, and substation placement. Planning support documents tailored for DNO, National Grid ESO, and local authorities
  • Detailed Design & Engineering: Final turbine position drawings with setback distances and environmental buffers. Electrical network design from turbines to Point of Supply, including cable routing and substations. Civil works design for foundations, crane hardstands, access tracks, and drainage systems. Earthing and lightning protection systems to IEC/BS EN standards. SCADA system integration for real-time monitoring and performance optimisation. Single Line Diagrams (SLDs), construction drawings, and technical specifications
  • Performance & Compliance: Full wind farm modelling in WindPRO including wake, electrical, and availability losses. Compliance with UK G99/G100 grid connection standards and dynamic stability requirements. Turbine technology evaluation based on site-specific wind class, turbulence intensity, and O&M needs. Mitigation strategies for noise, flicker, and environmental impacts
  • Construction & Handover Support: For-construction design packages with civil and electrical specifications. Technical liaison with ICPs, EPC contractors, and turbine suppliers. On-site engineering checks during foundation, cable, and turbine installation. Final as-built documentation and operational readiness handover