OCPP 1.6 vs OCPP 2.0.1: The Short Answer
The main difference between OCPP 1.6 and OCPP 2.0.1 is that OCPP 2.0.1 provides a more modern framework for security, device management, smart charging, transaction handling and ISO 15118-related workflows. OCPP 1.6 remains widely used and can still be suitable for many existing charging networks, while OCPP 2.0.1 is usually the better choice for new deployments that need stronger operational control, better diagnostics and a more future-ready charging infrastructure.
For EV charging operators, this is not only a protocol decision. It is also a business decision. The right choice affects charger procurement, EV charging point management system compatibility, cybersecurity operations, billing accuracy, support workflows, smart charging capabilities and long-term scalability.
If you are building or expanding a charging network, TrendPower helps operators manage OCPP-compatible chargers through scalable EV charging management software designed for commercial charging operations.
Key Takeaways
OCPP 1.6 is mature, widely deployed and often sufficient for basic charging operations. It can support common workflows such as authorization, remote start and stop, meter values, firmware updates and basic diagnostics.
OCPP 2.0.1 is more suitable when operators need richer charger data, certificate-oriented security, advanced smart charging, stronger device management and better preparation for ISO 15118 Plug & Charge use cases.
Migration from OCPP 1.6 to OCPP 2.0.1 should not be treated as a simple software upgrade. It may affect charger firmware, backend support, security policies, testing procedures, field operations, support training and billing workflows.
The best protocol choice depends on the operating model. A small AC charging site, a fleet depot, a highway DC fast-charging hub and a multi-brand CPO network do not have the same technical or commercial requirements.
Quick Comparison Table
| Area | OCPP 1.6 | OCPP 2.0.1 | Operator Impact |
|---|---|---|---|
| Market maturity | Very common in existing networks | Growing adoption for advanced deployments | OCPP 1.6 may be easier for legacy fleets; OCPP 2.0.1 is more future-ready. |
| Device model | Limited device structure | Richer component and variable model | Better diagnostics, configuration visibility and support workflows. |
| Security | Depends heavily on implementation and security profiles | Stronger security architecture and certificate-related capabilities | Better fit for connected commercial infrastructure. |
| Smart charging | Supports smart charging with less structure | More capable smart charging framework | Better for fleets, depots and power-constrained sites. |
| Transactions | More limited transaction model | More structured transaction events | Better reporting, troubleshooting and billing audit trails. |
| ISO 15118 readiness | Not originally designed around Plug & Charge workflows | Better alignment with ISO 15118-related coordination | Stronger foundation for future Plug & Charge deployments. |
| Certification | Mature OCPP 1.6 certification ecosystem | OCPP 2.0.1 certification continues to expand | Certification helps, but real-world workflow testing is still required. |
For official protocol background, operators can refer to the Open Charge Alliance OCPP overview.
What Is OCPP 1.6?
OCPP 1.6 became the practical standard for many EV charging networks because it solved a real market problem: charger manufacturers and backend platforms needed a common way to communicate. Instead of locking operators into a single proprietary system, OCPP helped create a more open ecosystem between charging stations and charging management platforms.
For many AC charging sites, workplace chargers, commercial properties and mature charging fleets, OCPP 1.6 still works well. It supports core operations such as user authorization, transaction start and stop, meter values, remote start or stop, firmware management and basic diagnostics.
The biggest strength of OCPP 1.6 is ecosystem maturity. Many chargers, CPMS platforms, installers and technical support teams already understand it. That reduces deployment risk and support friction.
However, the EV charging industry has become more complex since OCPP 1.6 became dominant. Operators now expect better uptime monitoring, stronger cybersecurity, detailed charger configuration, more advanced energy management, richer reporting and preparation for Plug & Charge. Those requirements expose the limitations of older protocol structures.
For a broader software foundation, see TrendPower’s guide on what EV charging software is and how it works.
What Is OCPP 2.0.1?
OCPP 2.0.1 was developed for a more advanced charging environment. It provides a stronger foundation for structured charger modeling, improved transaction workflows, enhanced security, smarter charging control and better alignment with ISO 15118-related use cases.
That does not mean every operator must use every OCPP 2.0.1 feature immediately. A public DC fast-charging network may prioritize uptime, diagnostics, certificate handling, payment-related workflows and remote maintenance. A fleet depot may care more about charging schedules, vehicle readiness and power limits. A residential or commercial property operator may focus on user access, billing and load management.
The value of OCPP 2.0.1 is that it gives the charging network a more capable technical foundation. But the protocol alone does not create operational excellence. The CPMS must translate protocol capabilities into usable workflows for site managers, support teams, finance teams and end users.
Operators comparing platforms should review how the backend handles charger onboarding, user access, pricing, remote control, load balancing, billing and reporting. TrendPower’s CPMS software guide for EV charging operators explains these platform-level requirements in more detail.
Security: Why OCPP 2.0.1 Has an Advantage
Security is one of the clearest differences in the OCPP 1.6 vs OCPP 2.0.1 comparison.
OCPP 1.6 can be deployed with security profiles, but many legacy installations were designed before EV charging infrastructure became a high-value connected asset. Today, chargers may interact with payment systems, user identity systems, vehicles, building networks, utility constraints and cloud platforms. That makes cybersecurity a practical operating requirement, not only a technical preference.
OCPP 2.0.1 places greater emphasis on secure operation, certificate handling and security-related events. For operators managing public charging sites, fleet depots or high-value commercial infrastructure, this stronger security architecture can support better risk management.
However, protocol-level security is only one part of the equation. Operators still need strong access controls, firmware policies, network segmentation, monitoring, incident response procedures and supplier accountability. The NIST cybersecurity profile for EV extreme fast charging infrastructure is a useful reference for understanding EV charging as a multi-domain cybersecurity ecosystem.
A secure OCPP 2.0.1 deployment requires both capable technology and disciplined operations.
Smart Charging: More Than a Power Limit
Both OCPP 1.6 and OCPP 2.0.1 can support smart charging concepts, but OCPP 2.0.1 provides a more capable structure for advanced energy management.
Smart charging is not simply sending a maximum current limit to a charger. In commercial networks, smart charging may include managing multiple chargers behind one grid connection, reducing demand charges, prioritizing fleet vehicles by departure time, coordinating with solar or battery systems and keeping the site within contracted capacity.
For a simple site, OCPP 1.6 may be enough. But for depots, multi-charger commercial hubs and power-constrained sites, OCPP 2.0.1 gives operators a stronger foundation.
Still, the CPMS matters as much as the protocol. The backend must calculate schedules, apply priorities, monitor site limits, update charging profiles and handle exceptions. Operators should ask suppliers how smart charging behaves when a charger goes offline, when a vehicle leaves early, when the site reaches its power limit or when charging priorities change during the day.
TrendPower’s article on intelligent operations management provides additional context on how real-time data, automation and analytics support more efficient charging operations.
Device Management and Diagnostics
OCPP 2.0.1’s device model is a major operational upgrade. OCPP 1.6 can provide important status information, but it does not describe charger components with the same level of structure.
With OCPP 2.0.1, a backend can work with components and variables. This can improve monitoring, configuration management and fault diagnosis. Instead of seeing only a general charger status, support teams can receive more specific information about connectors, meters, controllers, network interfaces or configuration issues.
In practice, this helps operators move from “the charger is unavailable” to a more useful investigation. Is the connector locked? Is the meter reporting incorrectly? Is the firmware configuration inconsistent? Is the network interface unstable? Is the charger limiting power because of a site constraint?
A richer device model can reduce troubleshooting time, but only if the charger manufacturer exposes useful data and the CPMS presents it clearly. Raw protocol data is not enough. Operators need dashboards, alerts and support workflows that turn charger data into practical decisions.
For operators managing multiple sites, TrendPower’s EV charging backend software guide explains how backend systems connect OCPP chargers with monitoring, billing, payments, load balancing and multi-site operations.
Transactions, Metering and Billing
Transaction data is the backbone of commercial EV charging. Operators need to know who charged, when the session started, how much energy was delivered, what tariff applied, whether the session ended correctly and whether the transaction can be reconciled with billing or payment systems.
OCPP 2.0.1 improves transaction handling and meter-value structures compared with older approaches. This can support clearer audit trails, better reporting and stronger integration with billing, payment and financial systems.
However, better protocol data does not remove the need for strong business logic. The CPMS still needs tariff configuration, tax handling, invoicing, roaming rules, refund workflows, receipt generation, settlement data and customer support tools.
When evaluating OCPP 2.0.1, buyers should test a complete revenue cycle. That means authorization, charging session, meter values, pricing, receipt, settlement data, error handling and reporting. A charger that connects successfully is not the same as a charging network that operates profitably.
For commercial operators, payment capability should be evaluated together with protocol support. TrendPower’s EV charging payment solution covers QR code payments, card payments, wallet balance payments, IC card access and whitelist-based charging scenarios.
ISO 15118 and Plug & Charge Readiness
OCPP 1.6 was not originally designed around ISO 15118 Plug & Charge workflows. OCPP 2.0.1 is better aligned with backend coordination for ISO 15118-related use cases.
Operators should still understand the difference between the standards. ISO 15118 defines communication between the electric vehicle and the charging station. OCPP defines communication between the charging station and the charging station management system. Plug & Charge requires the vehicle, charger, backend, certificate ecosystem, payment process and operator support model to work together.
This means OCPP 2.0.1 can be an important building block, but it is not a complete Plug & Charge solution by itself. Procurement teams should ask whether the charger, CPMS, certificate handling process, payment workflow and customer support model can deliver the specific Plug & Charge experience the business wants to offer.
For official ecosystem context, CharIN provides guidance on Plug & Charge interoperability. Operators can also review TrendPower’s practical guide to ISO 15118 Plug & Charge for a software and operations-focused explanation.
When OCPP 1.6 Is Still Enough
OCPP 1.6 may still be enough when the charger fleet is already deployed, business requirements are stable and the operator does not need advanced security, smart charging or ISO 15118 workflows in the short term.
It can also be practical for simple AC charging sites where the main needs are user authorization, basic billing, remote start and stop, meter values and status monitoring. Replacing functioning chargers only to change protocol versions may not deliver a fast return on investment.
For many operators, the right approach is phased. Keep stable OCPP 1.6 chargers running on a CPMS that supports them well. Then require OCPP 2.0.1 for new charger purchases, high-value sites, DC fast-charging locations and networks that need stronger operational control.
This avoids turning a protocol strategy into an expensive rip-and-replace project.
When OCPP 2.0.1 Is the Better Choice
OCPP 2.0.1 is usually the stronger choice for new deployments that require long-term scalability. It is especially relevant for public charging networks, fleet depots, multi-brand charger portfolios, high-uptime commercial sites, security-sensitive operators and businesses preparing for Plug & Charge.
It is also a better fit when the operator wants structured diagnostics, advanced power management, certificate-related security, more detailed transaction data and a clearer path to interoperability testing.
The business case becomes stronger when charger assets are expected to operate for many years. A charging network purchased today may need to support future energy management, roaming, payment, cybersecurity, uptime reporting and regulatory requirements. Choosing OCPP 2.0.1-compatible hardware and software can reduce the risk of being trapped in an older operating model.
Operators should also check whether suppliers can provide certification or testing evidence. The OCA OCPP 2.0.1 certification page is a useful starting point for understanding certification options.
Migration Roadmap from OCPP 1.6 to OCPP 2.0.1
Migration should be planned as a phased operational project.
The first phase is discovery. Identify which chargers can support OCPP 2.0.1 through firmware updates, which chargers are limited to OCPP 1.6 and which chargers should be replaced at end of life.
The second phase is platform readiness. Confirm that the CPMS can operate mixed fleets without forcing separate dashboards, inconsistent billing rules or different support processes.
The third phase is pilot testing. Select a small group of chargers and test them under real site conditions. During the pilot, measure more than connection success. Track session completion, meter value consistency, remote command response, smart charging behavior, security events, firmware workflows and support ticket volume.
If the pilot reveals too many edge cases, solve them before scaling. The lowest-risk migration path is often hybrid: keep stable OCPP 1.6 chargers online, require OCPP 2.0.1 for new strategic sites and standardize operational workflows across both versions.
For businesses planning a branded charging service, TrendPower’s white-label EV charging software can help operators launch a branded platform while supporting OCPP-based charger integration and scalable network management.
Cost, Training and Support Considerations
The protocol decision also affects people and cost. OCPP 2.0.1 can provide richer functionality, but operations teams may need training to understand device models, security events, certificate workflows and more detailed diagnostics.
Support scripts may need revision. Field technicians may need new firmware procedures. Customer service teams may need clearer explanations for smart charging limits, Plug & Charge authorization issues or interrupted transactions.
These costs are not reasons to avoid OCPP 2.0.1. They are reasons to plan adoption properly.
A mature CPMS should reduce training burden by making complex protocol data understandable. For example, a dashboard should not show only raw message names. It should translate events into operational meaning: charger unavailable, certificate expiring, transaction interrupted, connector fault, power limited by site cap or firmware update failed.
Expert Insight: Version Choice Should Follow the Operating Model
The right question is not “Which version is newer?” The right question is “Which operating model do we need to support?”
A parking operator with low-power AC chargers has different needs from a fleet depot with timed dispatch windows or a DC fast-charging hub with high payment exposure and high downtime cost.
For CPOs, fleet operators and charger buyers, OCPP 2.0.1 should be evaluated as part of a broader platform decision. Charger compatibility, billing, user access, energy control, remote diagnostics, API integration, security operations and support quality all matter.
A protocol can enable better operations, but it cannot replace good system design.
For more background on TrendPower’s software, engineering and operational focus, visit the TrendPower About page.
Buyer Checklist: Questions to Ask Before Choosing
Before deciding between OCPP 1.6 and OCPP 2.0.1, ask suppliers these questions:
- Which OCPP versions are supported today?
- Are the exact charger models tested with the CPMS?
- Which OCPP 2.0.1 feature profiles are implemented?
- Is there certification evidence or conformance testing documentation?
- How are certificates managed?
- How does the platform support remote diagnostics and firmware updates?
- Can the CPMS run the smart charging scenarios required by the site?
- How will legacy OCPP 1.6 chargers be managed during migration?
- What happens if a charger loses connectivity?
- Can billing and reporting use the required transaction data?
- How are firmware updates tested before rollout?
- What operational reports are available for uptime, utilization, faults and revenue?
Buyers can also check the OCA certified products database when supplier certification claims need verification.
FAQ About OCPP 1.6 vs OCPP 2.0.1
Is OCPP 2.0.1 always better than OCPP 1.6?
Not always. OCPP 2.0.1 is more capable, but OCPP 1.6 may still be enough for simple or legacy deployments. The best choice depends on charger hardware, backend support, security needs, smart charging requirements and migration cost.
Can OCPP 1.6 and OCPP 2.0.1 chargers run on the same CPMS?
Yes, if the CPMS supports both versions and has tested the specific charger models. Operators with mixed fleets should confirm onboarding, monitoring, billing, remote commands and reporting across both versions.
Does OCPP 2.0.1 certification guarantee full interoperability?
No. Certification provides important evidence, but it does not remove the need for site-specific testing. Operators should test the exact charger, firmware, network conditions, backend workflows and business features they plan to use.
Is “ocpp 2.0 1” the same as OCPP 2.0.1?
In most search contexts, “ocpp 2.0 1” is a variation or typo of OCPP 2.0.1. The official spelling is OCPP 2.0.1, and operators should use the official version name in technical documents, procurement requirements and product specifications.
Should new EV charging networks still buy OCPP 1.6 chargers?
It depends on the use case. For simple AC sites with limited requirements, OCPP 1.6 may still be acceptable. For new public networks, fleet depots, DC fast-charging sites or operators planning long-term scalability, OCPP 2.0.1 is usually the stronger requirement.
Conclusion: Choose the Protocol That Matches Your Growth Plan
OCPP 1.6 remains useful, but OCPP 2.0.1 is the stronger foundation for operators building secure, scalable and future-ready charging networks.
The decision should consider more than charger firmware. It should include CPMS workflows, security operations, smart charging needs, transaction data, billing complexity, support processes and long-term business goals.
If your EV charging network needs multi-brand charger support, OCPP compatibility, operational monitoring, billing tools and room to scale from current deployments to more advanced charging services, evaluate your CPMS and charger strategy together.
Explore TrendPower EV charging management software to compare OCPP support, CPMS functionality, billing, monitoring and scalable operations for your charger fleet.
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