Utility Power Supply Agreements
Multi-port EV stations require formal agreements with local utilities to secure and manage high-load supply.
- Power purchase agreements (PPAs) or supply contracts must be signed with the utility
- Load requirement applications must specify peak demand and charger count
- Interconnection agreements ensure compliance with grid safety and metering standards
- Utilities may assess grid impact and timeline for service provisioning
Transformer Sizing and Installation
Dedicated transformers must be installed to handle the cumulative load of high-speed chargers.
- Transformers typically range from 250 kVA to 2.5 MVA for multi-port sites
- Sizing depends on number of chargers, power rating (e.g., 150 kW or 350 kW), and usage pattern
- Sites with 4–8 DC fast chargers often require a dedicated medium-voltage transformer
- Transformer location and access must comply with safety and utility clearance guidelines
Distribution and Switchgear Requirements
On-site electrical infrastructure must support controlled, balanced, and protected energy distribution.
- Requires main switchgear panels with capacity for multiple charger circuits
- Smart load management systems balance usage across ports and avoid peak penalties
- Panels must include surge protection, circuit breakers, and isolation switches
- Cabling and conduit infrastructure must support high current loads with minimal voltage drop
Lead Time and Approval Process
Project timelines must account for equipment procurement, permitting, and utility activation stages.
- Transformer procurement and site setup may take 6 to 12 weeks depending on capacity
- Utility approvals for load addition and interconnection may add 30 to 60 days
- Delays can occur if upstream grid upgrades are needed or supply is limited
- Early utility coordination is critical to align design, permits, and commissioning
Transit-Oriented Development (TOD)
