A grid connection application is the formal request submitted to a Distribution Network Operator (DNO/DSO) to connect a new electrical load or generation asset to the distribution network, or to increase/modify an existing connection. For EV charging projects, it is the process used to secure the required import capacity (and export permissions if applicable), receive a connection offer, and define the technical and commercial conditions for energization.
What Is a Grid Connection Application?
A grid connection application is the DNO/DSO intake process used to evaluate whether the network can support a proposed connection.
– Applies to new EV charging sites, site expansions, and upgrades
– Results in a connection offer defining available capacity, reinforcement needs, costs, and timelines
– May include technical requirements for protection, metering, and operational limits at the point of connection (POC)
Why Grid Connection Applications Matter for EV Charging
Grid connection is often the critical path for depot and hub deployments.
– Determines if planned chargers can operate at required power levels
– Sets contractual limits that may require dynamic load management
– Identifies whether network reinforcement is needed and how long it will take
– Supports phased rollout and future load reservation planning
– Enables compliant commissioning and avoids delays at energization
What You Typically Submit
Exact requirements vary by DNO, but EV charging applications commonly include:
– Site address, MPAN (if existing), and current connection details
– Proposed maximum import demand (kW/kVA) and load profile assumptions
– Charger count, power levels, and operational simultaneity assumptions
– Single-line diagram and high-level electrical design concept
– Earthing arrangement and protection approach (especially for large sites)
– Any export capability (PV, BESS, V2G) and required export limits
– Phasing plan: Phase 1/2/3 demand levels and target dates
– Evidence of proposed limitation schemes if required (import/export caps)
Import vs Export Applications
The application pathway depends on whether the site can export power.
– EV charging only is primarily an import load application
– Sites with PV/BESS or V2G become import + export applications, often triggering additional grid code and limitation scheme requirements
– Export capability can significantly change approval scope and documentation
How the Application Process Typically Works
– Submit application with load details and supporting documents
– DNO/DSO performs network study to assess capacity and constraints
– DNO issues a connection offer (capacity, reinforcement scope, cost, timeline, conditions)
– Customer accepts the offer and proceeds with works and permitting
– Installation and grid commissioning are completed with required evidence pack
– Site is energized and operational limits are enforced in real operation
Key Design Considerations During Application
– Use realistic peak demand estimates and avoid over-optimistic diversity assumptions
– Consider dynamic load management to reduce required connection capacity
– Document building load peaks that coincide with charging peaks
– Plan for growth and reserve capacity where feasible
– Ensure measurement point for control schemes is at the correct location (POC)
– Align application demand numbers with single-line diagrams and future-proofed electrical architecture
Common Pitfalls
– Submitting generic or inflated demand numbers without operational justification
– Ignoring phased rollout needs, leading to repeated re-applications
– Discovering export capability late (PV/BESS planned later) and needing a new application
– Not accounting for internal site constraints (DB limits) even if grid capacity is available
– Missing documentation, delaying offer acceptance and energization timelines
– Underestimating DNO lead times and treating application as a late-stage task
Related Glossary Terms
Distribution Network Operator (DNO)
Grid connection agreement
Connection offer
Grid capacity
Grid capacity analysis
Network reinforcement
Grid commissioning
Dynamic load management
Future load reservation