Learn the OCPP certification process step by step. Avoid the 8 failure patterns, prepare all 5 artifacts, and pass OCA on your first attempt.
Is your EV charger ready for market but stuck waiting on a certification that could take months to get?
This happens more often than you'd think!
When manufacturers underestimate what the OCA testing process actually demands, or show up to the lab without the right artifacts, they burn thousands of dollars and miss key funding deadlines like NEVI and CALeVIP.
That's why this guide walks you through exactly how to pass OCPP certification on the first attempt, from what the badge actually proves to the eight failure patterns that catch even well-prepared teams off guard.
A lot of manufacturers treat OCA certification as a broad stamp of approval. That's not what it is.
The OCPP certification process is a precise, version-locked check that a specific firmware build, running on a defined hardware setup, correctly carries out the communication structures set out by the Open Charge Alliance.
OCA certification is one foundational part of a much larger compliance picture, not the whole picture.
The OCA doesn't carry out testing itself. Testing gets handed off to a small group of accredited, independent laboratories, and your choice of lab directly affects your go-to-market timeline.
The three legacy institutions that have led this space in the OCPP certification process:
The key advantage of this global testing lab network: The OCPP certification earned at any single accredited lab is recognized worldwide. You don't need to test in every region.
Labs will not start testing without a complete pre-submission package. Showing up without any one of these five artifacts leads to immediate rejection, loss of your deposit, and a delay that could wipe out an entire funding cycle.
The Protocol Implementation Conformance Statement is the most sensitive document in the entire process. The document lays out exactly which OCPP certification features and optional profiles your device supports, and the lab only tests what you put down.
Vendors are often tempted to put down every optional profile to boost the certificate's commercial appeal. Don't. Declaring an optional profile, such as Smart Charging, ISO 15118, or Advanced Security, makes it a required part of that certification run. One failure in any declared profile takes down the entire submission.
Experienced compliance engineers stick to a conservative declaration rule: only put down what your firmware carries out perfectly under the most demanding test conditions. The mandatory profile is non-negotiable. Everything else gets declared only when it has been thoroughly pre-tested and is needed for your target customer base.
The OCTT is a software tool provided by the OCA that runs the exact same test cases the independent labs use. Before booking a lab, your team must run thorough internal OCTT cycles and turn out clean pass reports across every profile declared in your PICS.
Labs are not there to fix broken software. Sending in a device without clean OCTT reports is a costly mistake, as formal certification runs cost upwards of 5,000 to 16,500 euros per attempt regardless of outcome.
Your internal OCTT reports do two things: they give the lab baseline confidence in your device's stability, and they bring up behavioral issues in your asynchronous message handling before the fee clock starts.
Zero anomalies. That's the bar. Any flag the OCTT throws up internally will turn into a hard failure at the lab.
Advanced Security (Security Profile 3) calls for Transport Layer Security with strict client authentication.
To test this profile before your OCPP certification process, you must hand over complete Public Key Infrastructure material before the session kicks off, including root certificates, intermediate certificate authorities, and the client certificates needed to set up a mutually authenticated cryptographic handshake.
The lab uses these artifacts to check that your device correctly encrypts websocket payloads, parses certificate chains, deals with certificate expiration, and cuts off connections when presented with revoked or broken certificates.
Incomplete PKI material, or cipher suites that don't line up with the protocol's cryptographic standards, stops the lab from getting the test sequence off the ground at all.
Certification depends on absolute consistency. The same inputs must reliably produce the same outputs every time.
Your charger configuration snapshot is a full readout of every readable and writable configuration key, including heartbeat intervals, authorization timeout thresholds, websocket retry algorithms, connector counts, and meter value sample intervals.
Any gap between your declared configuration and actual runtime behavior is immediate grounds for failure during the OCPP certification process.
If your snapshot puts down 60-second meter value intervals and your device transmits at 30 seconds, the test fails. Lock the configuration down, apply version control, and cross-reference it against your PICS before sending anything in.
The certificate issued by the OCA ties directly to one specific firmware build. That means a cryptographic hash of your compiled codebase must stay completely untouched from the moment internal OCTT checks wrap up your OCPP certification process until the lab sends out its final report.
No patches. No bug fixes. No commits of any kind. Engineering teams used to continuous deployment pipelines consistently struggle with this requirement, but changing the firmware after the freeze wipes out all prior test reports and breaks the lab agreement.
The freeze is a formal sign-off from the CTO that the team has stopped all work on the release candidate.
Go into the lab session as a performance audit, not an exploratory test. The fees for the OCPP certification process cover one full test run, with debugging and retesting billed separately. Use the four weeks before your session to work through every possible source of failure.
Even well-prepared teams consistently run into the same points of failure. These eight patterns account for the majority of first-attempt failures during the OCPP certification process:
OCPP certification costs go up with hardware type (AC vs DC), protocol version, optional profiles declared, and OCA membership status. These are the maximum fees for one full test run, with pretesting, debugging, and retesting billed separately.
OCPP 1.6 Maximum Fees:
OCPP 2.0.1 Maximum Fees (Mandatory Profile plus Additional Profiles):
On top of lab fees, set aside a budget for internal pre-testing tools. Isolated OCTT runs outside structured programs can come in at around 5,000 USD per test.
On timelines: CALeVIP required proof of OCPP 1.6 certification by January 1, 2024, and full OCPP 2.0 certification by January 1, 2025. NEVI rolls out interoperability standards across the entire domestic US charging network.
Because of these back-to-back deadlines, lab capacity at DEKRA and DNV is heavily constrained. The full cycle, from internal OCTT checks to lab booking, test execution, and certificate issuance, can run to three to six months.
A failed first attempt puts you back at the end of the queue, which may mean missing an entire funding cycle.
The OCPP certification process marks the start of a compliance lifecycle, not the end of it.
Your certificate ties directly to one specific firmware version. Any firmware change, including a minor bug fix, technically results in an uncertified device unless recertification gets carried out. If you want to add a related product to an existing certificate without a full re-evaluation, the product must qualify as an OCPP product family member.
This covers minor hardware changes such as display size updates or casing modifications that don't alter the protocol communication stack. The cost comes down considerably at 500 euros per product family member from the lab, plus a 250 euro OCA administrative fee.
That exemption doesn't apply to fundamental firmware changes. Adding ISO 15118 Plug and Charge after certification requires a full re-evaluation of that profile.
Beyond the protocol itself, stay on top of two additional ongoing requirements:
Want to know more about how we specialize with this at Entrans? Book a free consultation call!
OCPP certification is an independent check that a specific firmware build, on a defined hardware setup, correctly carries out the Open Charge Point Protocol communication structures set out by the Open Charge Alliance. The process proves digital interoperability, not hardware safety or operational uptime.
The OCTT is a software tool by the Open Charge Alliance that runs the exact same test cases used by independent certification laboratories. Vendors must run through it internally to turn out clean pre-lab test reports before booking a formal lab session.
You pay the full lab fee regardless of outcome, drop back to the end of the queue, and risk missing key regulatory deadlines tied to CALeVIP and NEVI funding cycles. Passing on the first attempt is a financial and scheduling necessity, not just a preference.
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