How Should EV Charging Infrastructure Be Planned in Corporate Facilities?

Electric vehicle charging infrastructure is not only a device purchase decision. For proper planning in corporate facilities, power capacity, transformer infrastructure, user profile, payment model, fire safety, data communication and energy management should be evaluated together.

An incorrectly designed charging system creates problems on two sides. On the electrical infrastructure side, peak load, panel capacity, cable cross-section and power quality may be strained. On the user side, queues, authorization confusion, inability to track faults or incorrect cost allocation may create operational problems.

AC and DC Charging Decision

AC charging stations are suitable for long-stay parking areas. In employee parking lots, fleet night parking, residences or office campuses, vehicles can remain connected for hours. In this scenario, more sockets at lower power may be more valuable for user experience than a single high-power device.

DC fast charging is preferred in areas where shorter waiting time is needed. Logistics operations, customer parking, fuel stations, shopping malls or fleets with fast urban turnaround may justify DC investment. However, DC devices have higher power requirement, transformer impact, demand power and investment cost.

When deciding, the average time vehicles stay at the facility, daily vehicle turnover and user types should be read together. Employee parking, fleet parking and public customer use do not lead to the same device choice. How many vehicles will charge simultaneously and whether the system is built as a revenue model or internal operational support also directly changes the capacity decision.

User Model and Authorization

In corporate charging infrastructure, the user model is as important as technical design. Employee use requires identity verification, limit definition and cost sharing. Fleet use highlights vehicle-based reporting, department breakdown and daily route planning. In public commercial use, charge network operation, payment, price display and user support processes come into play.

For this reason, the operating model should be clarified before device selection. Closed internal use and public commercial use do not have the same technical and legal requirements.

Power Infrastructure

As the number of charging points increases, transformer, panel, cabling and load management become critical. Assuming that all devices will run at maximum power simultaneously may not be realistic; but planning capacity without ever making this assumption is also risky. The correct approach is to structure simultaneity factor and dynamic load management according to the use case.

With load management, existing infrastructure can be used more efficiently and unnecessary power-increase investments can be reduced.

Technical review should not be limited to checking transformer spare capacity. Main panel and sub-panel suitability, fuse selectivity, cable route, voltage drop, grounding, residual current protection and fire safety are checked together. Communication infrastructure should also be addressed early; SIM, Ethernet or Wi-Fi preference, remote monitoring and OCPP compatibility determine future operating quality. If the facility has a solar or energy storage investment plan, the charging infrastructure should be designed scalable for that possibility.

Regulation and Commercial Use Note

In Türkiye, public commercial charging service is evaluated differently from an internal socket or closed fleet charging. Charge network operation, pricing, service to the user and registration/reporting processes are related to EPDK regulations. Therefore, the approach of "put devices in the parking lot and let everyone use them" is not correct.

Even in closed-loop use, the facility’s electrical project, occupational safety and insurance side should be checked. If commercial use is targeted, working with a licensed charge network operator, operating model and contractual responsibilities should be clarified from the beginning.

Operation and Revenue Model

In corporate areas, charging infrastructure can be designed for employee use, fleet use or public commercial use. Each model has different payment, authorization and reporting needs.

In employee use, many organizations require a monthly limit, kWh-based collection or payroll/benefit integration. In fleet use, vehicle-based energy consumption and kilometer cost are tracked. In customer use, payment screen, support line, fault response and location visibility become important.

For the revenue model to be realistic, device occupancy rate, connection power cost, maintenance expense, payment commissions and downtime should be included. A fast charger with low utilization may show weak financial performance despite expectations of high unit revenue.

Implementation Sequence

The flow that produces good results in corporate facilities usually starts with site analysis. First, existing electrical infrastructure and peak load are reviewed; then user model, daily vehicle movement and AC/DC device mix are clarified. After layout is decided, panel, cable, protection and communication infrastructure are designed. In the final stage, software, payment, authorization, reporting, maintenance and fault response are collected in one operating plan.

Conclusion

EV charging investment is a natural extension of energy infrastructure. Therefore, it operates more sustainably when the electrical project, software integration and operating model are designed together.

The right question is not "how many chargers should we buy", but "for which user, under which power limit, with which operating model and with which energy management discipline are we building a system?"