Most charge point operators don’t think about OCPP until something breaks. A charger stops responding to the management platform. A firmware update fails. The new hardware from a different vendor won’t talk to the old CSMS.

That’s when OCPP stops being a protocol spec and becomes a business problem.

This guide covers what OCPP actually does for your operation, what changed from 1.6 to 2.0.1, and how to migrate without disrupting service.

1. What Is OCPP — And Why It Matters More Than You Think

OCPP stands for Open Charge Point Protocol. It’s the language that charging stations and central management systems use to talk to each other. Start a charge, stop a charge, report metering data, send firmware updates — all of it travels through OCPP messages.

Open means you are not locked to one vendor. If your chargers speak OCPP, you can switch CSMS providers. If your CSMS supports OCPP, you can add chargers from multiple manufacturers. That leverage disappears the moment you buy into a proprietary protocol.

Operators running 50+ chargers on proprietary systems face three hard costs:

• Vendor lock-in. Your CSMS only works with chargers from one brand. Prices go up. You have no alternatives.

• Integration dead ends. Want to add a different brand’s DC fast charger to fill a gap? Not possible without middleware.

• Valuation drag. When you sell the network, buyers discount proprietary systems. Open-standard networks command higher multiples.

2. OCPP 1.6 vs 2.0.1: What Actually Changed

OCPP 1.6 has been the workhorse since 2015. It handles the basics — start/stop charging, meter values, firmware updates. But it shows its age in a few places.

Five things 2.0.1 does that 1.6 doesn’t:

Device management that works at scale. OCPP 1.6 treats each charger as an independent unit. You configure them one at a time. OCPP 2.0.1 introduces device model — a standardized way to read and write configuration across every charger in your network from a single screen. If you are managing 200 chargers, this alone justifies the migration.

Security that doesn’t depend on hope. 1.6 sends messages in plain text by default. TLS is optional. 2.0.1 mandates TLS 1.2 or higher and adds firmware signing — the charger verifies a firmware update came from you before installing it. No signed firmware, no install. This closes the most common attack vector on public charging networks.

Smart charging that actually saves money. 1.6 has basic profiles for limiting power. 2.0.1 adds real-time charging schedules, dynamic tariff signals, and integration with ISO 15118 for vehicle-to-grid communication. For operators in markets with demand charges or time-of-use pricing, this is the difference between a power bill that hurts and one you can plan around.

Proper transaction handling. 1.6’s transaction model assumes one charger, one vehicle, one session. 2.0.1 handles simultaneous transactions on multi-connector chargers — which is what most DC fast chargers actually are.

**ISO 15118 native support.** Plug & Charge, where the car authenticates itself and starts charging without an app or RFID card, requires OCPP 2.0.1 and ISO 15118. If your network wants to offer this experience, you need 2.0.1.

3. OCPP vs Proprietary: The Real Cost Comparison

Proprietary protocols promise simplicity. One vendor. One platform. Everything works out of the box.

The tradeoff arrives later:

We’ve seen operators buy proprietary systems to save 8% on hardware, then spend 3× that building custom integrations two years later when they needed to add capacity from a different supplier.

4. Migration: How to Go from 1.6 to 2.0.1

A migration doesn’t mean replacing your chargers. Most modern hardware from reputable manufacturers supports both protocols. The question is sequencing.

Phase 1: Audit your fleet. List every charger model, firmware version, and current OCPP version. Some chargers manufactured before 2020 may need hardware upgrades. Most post-2021 units from Anari Energy and other major manufacturers support 2.0.1 via firmware update.

Phase 2: Verify your CSMS. Not every management platform supports 2.0.1 yet. Confirm with your provider. If they don’t, your migration path starts with the CSMS, not the chargers.

Phase 3: Run parallel. Pick 3-5 charger locations. Upgrade firmware to 2.0.1. Keep them connected to the CSMS on 2.0.1 while the rest of the fleet stays on 1.6. Monitor for two weeks. Charging sessions should be indistinguishable.

Phase 4: Roll out in batches. Migrate 20% of your fleet per week. This keeps the network operational and gives you time to catch anomalies before they affect every charger.

Phase 5: Validate compliance. After migration, run a compliance check: verify TLS is enforced, firmware signing is active, and smart charging profiles respond to CSMS commands. A charger claiming 2.0.1 support is not the same as a charger fully implementing 2.0.1.

Anari Energy chargers ship with OCPP 1.6J as standard, with 2.0.1 available via firmware upgrade across the full DC series. For operators planning migration, our team provides the firmware package, test environment access, and remote support through the rollout.