What is Anti-Tamper Detection (AHP-Platform)?

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Applicable models:

Eve Single Plus
Eve Double Plus
Twin 5 Plus (from May 2026 onwards an extension board to retrofit a Twin 5 or Twin 5 Plus up to May ‘26 is expected to be available in Q3 ’26. )

Why has Alfen introduced tamper detection?

Tamper detection is introduced to protect the internals of the charging station by monitoring whether the housing is properly closed or not.

Tamper detection on AHP

Tamper detection is a functionality on our Eve Single Plus, Eve Double Plus and Twin 5 Plus to send a status notification to the CPMS when any part of the casing is opened.
This is required functionality in the ENCS and IEC62443-4-2:2019.

If a charger is running FW2.5 or later, equipped with tamper hardware, and when tamper mode is set to Strict, tampering with the charger (opening the enclosure) will now result in a security log and a security event notification being sent to the back office when using OCPP 1.6 Security Whitepaper (i.e. SecurityProfile > 0). Availability of tamper detection can be checked from the back office using the TamperDetectionAvailable configuration key.
The tamper mode can be set to Strict from the back office using the TamperDetectionMode configuration key.

Overview

In the table below, an overview is shown of the different security levels and messing on tamper events.

OCPP version	Security level	Messaging
OCPP 1.6	0	Informational status notification
OCPP 1.6 Security Whitepaper	1 or 2	Security event notification
OCPP 2.0.1	0	Informational status notification
OCPP 2.0.1	1 or 2	Security event notification

Features overview

Tamper detection is a security feature that monitors the charging station enclosure and detects unauthorized access.
When the enclosure is opened without authorization or in an unplanned period of time, the system reports the event to the Back Office.
The following key features are supported:

Multiple detection modes

The system supports Disabled, Strict, and Authorization modes, allowing flexible control over how enclosure openings are handled.

Authorization-based access control

Enables safe maintenance by allowing enclosure access within a defined authorization window without triggering alerts.

Configurable authorization timing

Includes settings that define when maintenance may be performed and how long access is permitted before tamper detection becomes active again, and scheduled start time to manage maintenance access periods.

Real-time event reporting

Tamper events are automatically reported to the Back Office for monitoring and logging.swer 1.4

Protocol support

OCPP 1.6 and OCPP 2.0.1