Optimal Open Charging for Efficient Logistics
Exploring the limitations of OCPI 2.0 connector reservations and the critical need for power reservation capabilities in optimal electric vehicle logistics systems.
The Promise and Limitations of OCPI Standards
Having recently dove deep into the OCPI 2.0 documentation and reviewed the business case for OCPI 3.0, I find myself both impressed and frustrated. The Open Charge Point Interface (OCPI) standard is undoubtedly brilliant - it's creating the foundation for interoperability in the electric vehicle charging ecosystem. But as someone working in optimal logistics systems, I've identified a critical gap that could fundamentally limit the efficiency of future electric transport networks.
The Vision: Truly Optimal Logistics Systems
An optimal logistics system requires complete predictability and transparency. To run effective path planning algorithms and achieve full network efficiency, the system needs to know about:
- All vehicles in the fleet
- All available chargers
- All packages/cargo that need transport
- Predictive demand patterns
This level of optimization is essential for electric truck fleets, where range limitations and charging requirements add new constraints to traditional logistics planning.
OCPI Modules: Great Building Blocks
OCPI provides several powerful modules:
- Commands: Remote control capabilities
- Charging Profiles: Power management and smart charging
- Reservations: Advance booking of charging resources
These modules are excellent foundations, but there's a fundamental flaw in the reservation system that undermines optimal logistics planning.
The Core Problem: Connector vs. Power Reservation
Currently, OCPI only supports connector reservations - you can reserve a specific charging connector for a specific time. But this creates a critical blindspot for logistics optimization:
"What I need to know is: can I get the power that I need at the time that I require it?"
Consider these scenarios where connector reservation falls short:
- Power sharing: Multiple connectors sharing the same power source
- Dynamic power allocation: Chargers with variable power output based on load
- Thermal constraints: Overheated chargers reducing available power
- Grid constraints: Variable power availability based on grid conditions
In each case, having a reserved connector doesn't guarantee the power needed to complete the charging session within the planned timeframe.
Missing Infrastructure Data for Commercial Vehicles
Beyond power reservation, there are other critical gaps when it comes to commercial vehicle logistics. The current OCPI standard focuses primarily on passenger cars, but electric trucks have fundamentally different infrastructure requirements that aren't addressed:
- Weight capacity: Can the charging parking area support a fully loaded 40-ton truck?
- Physical dimensions: Height clearances, width restrictions, and length requirements for truck maneuverability
- Connector positioning: Is the charging connector positioned where the truck's inlet can actually reach it?
- Approach angles: Can a truck with a trailer navigate into and out of the charging bay?
These considerations are obvious when you think about it, but they're completely absent from current charging infrastructure data standards. A logistics operator needs to know not just that a 350kW charger exists, but whether their specific truck configuration can physically use it.
The Solution: Power Reservation Standards
What we need is the ability to reserve specific amounts of power for specific durations. This approach offers benefits for both logistics operators and charge point operators:
Benefits for Logistics Operators:
- Guaranteed power availability for route planning
- Predictable charging session durations
- Ability to optimize routes with confidence
- Risk mitigation for time-critical deliveries
Benefits for Charge Point Operators:
- Revenue optimization through power-based pricing
- Better grid load planning
- Reduced conflicts and customer complaints
- Premium pricing for guaranteed power availability
Business Model Innovation
A power reservation system would enable new business models. For example, when transporting critical medical supplies, a logistics operator might reserve 150kW for 30 minutes, even if they only need 75kW. They pay for what they reserve, creating a buffer that ensures mission-critical deliveries stay on schedule. The charge point operator benefits from this premium reservation fee without additional infrastructure costs.
The Path Forward
The question remains: should this be integrated into OCPI 3.0, or does the need for universal compatibility mean standards will always cater to the lowest common denominator? Perhaps the answer lies in developing specialized extensions or even alternative standards specifically designed for optimal logistics systems.
For commercial vehicle logistics to truly thrive in the electric era, we need standards that account for both power management and physical infrastructure compatibility. The missing truck-specific data points I mentioned are just the beginning - we need comprehensive infrastructure databases that enable truly intelligent route planning.
Final Thoughts
As we transition to electric commercial vehicles, we have an opportunity to build logistics systems that are not just cleaner, but significantly more efficient than their fossil fuel predecessors. However, this requires charging infrastructure standards that support the level of predictability and control that optimal systems demand.
The technology exists. The business case is clear. Now we need the standards to catch up with the vision - including the obvious but overlooked physical requirements of commercial vehicles.