Fleet & Bus

EV Fleet Depot DC Charging Infrastructure

Managed charging infrastructure for bus depots, logistics hubs and delivery fleets. Plan charger power, load management, RFID driver access, OCPP/CSMS reporting and maintenance before ordering hardware.

22-120kW

Per Bay

Fleet OCPP

Management

RFID

Driver Access

CSMS

Cost Control

Site planning checklist

Size the depot from route readiness, not charger count

Fleet depot EV charging should start with vehicle count, battery size, daily mileage, return windows, departure priorities and available transformer capacity. Use AC where vehicles have long dwell time and DC for shorter turnaround or exception bays, then define load limits, connector rules, RFID identities and OCPP or CSMS reporting before selecting quantities.

Fleet energy need

Collect vehicle count, battery capacity, daily mileage, return state and route schedule.

Charging window

Map arrival groups, departure times, priority vehicles and long-dwell versus fast-turnaround bays.

Depot power

Confirm transformer size, spare capacity, input voltage, peak limit and expansion plan.

Operations

Define connector, bay layout, OCPP or CSMS, RFID user rules, reports, remote diagnostics and maintenance responsibility.

Continue project planning

120kW dual-connector charger 22kW fleet wallbox Fleet load-balancing guide OCPP fleet management

Procurement FAQ

Questions buyers usually ask before the first quotation

What power is common for fleet depots?+

60kW to 120kW can fit overnight or moderate depot charging. 150kW to 180kW is useful when turnaround time is shorter.

Do fleet chargers need OCPP?+

OCPP/CSMS is strongly recommended for scheduling, reporting, remote diagnostics and driver or vehicle account control.

What should a fleet RFQ include?+

Send vehicle count, battery size, route schedule, depot grid capacity, connector standard, charger power and expected charging windows.

Trade-show visitors viewing EV charging equipment

The Challenge

Fleet operators converting from diesel face a classic depot problem: if all vehicles charge at the same time, the grid connection and electricity bill become hard to control. They need chargers that match route schedules, driver access rules, available power, payment or cost-allocation policy and maintenance windows. For software scope, review the fleet charging management / CPO platform guide before confirming charger quantities.

Our Approach

Depot charging schedule: OCPP smart charging assigns charging windows by departure time, expected energy need and site power limit.
AC overnight bays: 7kW, 11kW or 22kW AC chargers fit long parking windows for vans, staff cars and some depot vehicles.
DC top-up bays: 60kW, 120kW or 150kW DC fast chargers support short turnaround, emergency top-up and high-utilization vehicles.
RFID and payment policy: Use RFID driver ID for private fleets, or QR/POS payment if the depot also opens chargers to public or partner users.
Per-vehicle energy reports: Each charger reports kWh per session, driver or vehicle ID, faults and charger availability to the CSMS.
Maintenance planning: Confirm remote diagnostics, spare parts, cable replacement, connector cleaning and uptime responsibility before rollout.

Fleet depot design checklist

Planning item	What to confirm	Useful SUNFULL page
Depot layout	Bay count, cable route, vehicle turning radius, charger mounting, safety distance and service access.	Fleet charging solution
Power selection	AC for long-dwell vehicles, DC for top-up or tight turnaround, and future expansion space.	Power selection guide
Load management	Site power limit, transformer capacity, peak tariff, charging window and optional BESS buffer.	OCPP / CSMS platform
RFID/payment	Driver ID, employee charging, partner access, QR payment or POS terminal needs.	RFID, QR and POS guide
Maintenance	Remote fault alarm, spare cable/gun, module replacement, preventive inspection and service responsibility.	OCPP testing checklist

Fleet RFQ information to send

Share fleet size, vehicle type, route window, daily mileage, parking time, available grid power, charger quantity, AC/DC mix, RFID or payment requirement, OCPP/CSMS backend preference and maintenance responsibility. This is more useful than asking for a charger price alone.

Example depot design scenario

40-bay overnight bus depot planning example

A depot with 40 overnight bays may combine 22kW AC chargers for long-dwell vehicles with several DC top-up bays for exceptions. The design should limit simultaneous peak load, identify each driver or vehicle by RFID, and report kWh by session through the CSMS for cost allocation.

FAQ

How should a depot plan for vehicles that must be ready at shift start?

Start with available vehicle state-of-charge data, route schedules, charging windows and the depot power limit. Priority logic can then favor earlier departures or lower-charge vehicles, but readiness depends on data availability, vehicle demand, site capacity, charger uptime and the accepted CSMS control scope.

Can the system handle mixed fleets - cars, vans, buses?

Yes. Each bay is configured with its own power limit and vehicle type. The scheduling algorithm treats each vehicle independently based on its actual energy need.

What happens if a vehicle needs emergency top-up during the day?

Designate 1-2 DC fast charger bays as on-demand bays. These are not part of the scheduled overnight program and can be used ad-hoc by drivers via RFID.

Can I integrate with our existing fleet management software?

Third-party fleet-system integration must be defined and tested project by project. Provide the target platform, available API or webhook documentation, required data fields, authentication method and acceptance tests before the charger, CSMS and integration responsibilities are agreed.

Do fleet depots need payment terminals?

Private depots usually use RFID driver or vehicle ID instead of POS payment. If chargers will be opened to public users, contractors or partner fleets, QR payment, app payment or POS terminal scope should be confirmed before ordering.

Ready to Start Your Project?

Send us your site plan or power requirements and the team can review the project scope and confirm the next technical and commercial steps.

OCPP & Fleet Knowledge Hub

Related OCPP, CSMS and depot-charging guides

Use these pages together to define protocol version, backend, authentication, payment, load management and acceptance testing before ordering chargers.

OCPP / CSMS charger support

Compare OCPP 1.6J, OCPP 2.0.1, cloud operation and integration scope.

OCPP 1.6J vs 2.0.1

Choose protocol scope by backend functions and lifecycle requirements.

Backend testing checklist

Verify connection, meter values, remote commands, alarms and firmware.

Fleet depot load balancing

Plan charging windows, transformer capacity, priority and managed load.

Fleet DC charger with OCPP

Review a commercial fleet charger platform before fixing the depot power plan.

RFID, QR and POS payment

Define authorization, tariff and settlement workflows before integration.

Depot planning

EV Fleet Charging Infrastructure Starts With the Operating Schedule

EV fleet charging should be sized from route energy, return times, dwell windows, reserve vehicles and site capacity. Effective EV fleet charging solutions connect those operating inputs to charger quantity, power sharing, bay layout, CSMS rules and a phased expansion path.

Energy before power

Calculate the energy each vehicle must recover before departure, then model simultaneous demand instead of selecting chargers from maximum power alone.

Managed departure readiness

Set vehicle priorities, charging windows and exception rules so the control plan supports operations when several vehicles return together.

Expandable depot architecture

Reserve electrical, civil, network and parking provisions for later bays so the EV fleet charging infrastructure can grow without repeating avoidable site work.

Fleet load-balancing guide Charging-site design guide Installation planning guide