Work backward from the next required departure
For each truck, record when it returns, the energy it needs to recover and when it must leave again. Include time lost to parking, queues and operating tasks. The useful charging window may be shorter than the time between shifts.
Vehicle charge limits, charger behavior and site supply jointly determine what can be delivered. A higher charger nameplate rating provides no benefit when another part of the installation limits power. Connector fit is only one compatibility check.
Test the fleet schedule against the site limit
Overlapping returns and shared power can change the result as the fleet grows. DOE guidance provides a planning framework, while local electrical requirements, utility conditions and the selected equipment govern the installation.
Scroll horizontally to view all columns.
| Decision | What to establish | Condition or limit |
|---|---|---|
| Energy and dwell | Calculate recovery need within the available parking window. | Charger nameplate power is not delivered energy at all times. |
| Interoperability | Verify connector, protocol, vehicle limit and charger operation together. | Physical connector fit alone does not prove successful charging. |
| Site capacity | Model simultaneous demand and managed-charging rules. | Adding charger ratings can exceed the real site and utility limit. |
| Operations | Design parking, cable reach, access, fault response and backup. | A powered charger is not a complete fleet-ready charging process. |
Commission the complete vehicle and charger combination
Request a site plan covering demand management, parking, cable access, ownership and fault support. Verify charging during the intended dwell period and define the response to an unavailable charger before relying on it for dispatch.
Information to prepare for this review
- Energy to recover per vehicle and shift
- Arrival, departure and dwell windows
- Vehicle charge-port and maximum charge data
- Charger interface, power and communication options
- Site electrical capacity and utility constraints
- Parking, cable, safety, commissioning and backup plan
Records to request and keep
- Per-vehicle energy and dwell schedule
- Vehicle and charger interoperability confirmation
- Qualified electrical load and site design
- Commissioning, fault-response and backup record
Common mistakes and what to check instead
- Buying the highest-power charger: Match energy, dwell, vehicle acceptance and site capacity.
- Counting all overnight hours as charging time: Use real arrival, parking, queue and departure windows.
- Skipping interoperability commissioning: Test the selected vehicle, cable, charger, software and fault reporting together.
Scope of this guide
This guide does not design an electrical installation or estimate a utility tariff.
Qualified electrical professionals, utilities and local codes control the depot.
Do not energize or operate uncommissioned, damaged, incompatible or improperly protected charging equipment.
Sources and applicability
Controls the project-input, quotation, approval and inspection workflow described in this guide.
Provides public checklists and worksheets; the signed project documents remain controlling.
Defines the relevant product family and published configuration boundaries. Project-specific ratings require the selected OEM documents.
Primary public guidance supporting route, dwell-time, charging-plan, procurement and infrastructure inputs. U.S. programs and examples are not global requirements.
Primary international regulation reference for electric-powertrain and rechargeable-energy-storage safety where adopted. Applicability and approval status must be confirmed for the vehicle and destination.