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Key differences between Maven ELD and Maven VDA

How the ELD system and the vehicle data adapter work together

Overview

Maven uses the terms ELD and VDA for two different but connected parts of the system:

  • ELD = the electronic logging solution (software + workflows) that manages Hours of Service (HOS) and compliance.

  • VDA = the Vehicle Data Adapter, the hardware device in the truck that sends vehicle data to Maven.

This article explains how they differ and how they work together.

What is the ELD?

The Electronic Logging Device (ELD) is the overall compliance product that:

  • Runs in the Maven mobile app and Maven backend services.

  • Records and manages driver HOS:

    • Drive, break, shift, and cycle clocks

    • Duty status changes (manual and automatic)

    • Violations and alerts

  • Stores and displays driver logs for:

    • Drivers (in the app)

    • Safety and compliance teams (in the portal)

  • Supports roadside inspections and ELD outputs.

In short, ELD = the software and workflows that keep drivers compliant.

What is the VDA?

The Vehicle Data Adapter (VDA) is the physical device installed in the truck. It:

  • Plugs into the vehicle diagnostic port or wiring.

  • Collects critical vehicle data, such as:

    • Odometer

    • Engine hours

    • Vehicle speed

    • Ignition status

    • GPS location

    • Voltage

  • Sends that data to Maven to power:

    • Automatic Duty Status Change (ADSC)

    • Accurate mileage and IFTA

    • Vehicle movement history and telematics

    • Vehicle health and performance insights.

Internally, Maven refers to this hardware as the VDA (often “M2” or “M3”). Customers may call it an ELD, relay, gateway, hub, “the plug,” or telematics unit.

How their roles differ

ELD (software and compliance):

  • Applies FMCSA HOS rules.

  • Calculates and displays:

    • Drive, break, shift, and cycle clocks

    • Violations and remaining time.

  • Manages:

    • Log edits and certifications

    • Inspection mode and ELD files.

VDA (hardware and data):

  • Supplies the raw engine and movement data that the ELD needs, including:

    • When the vehicle moves over 5 mph

    • When the engine turns on or off

    • Distance traveled and location.

  • Enables:

    • Automatic duty status changes

    • Mileage and trip records

    • Fleet visibility in the portal.

The ELD cannot function correctly without accurate data from the VDA.

Who interacts with each

ELD:

  • Drivers using the Maven mobile app.

  • Safety and compliance teams reviewing logs and violations.

  • Inspectors during roadside checks.

VDA:

  • Mechanics and installers mounting and wiring the device.

  • Fleet admins and operations staff:

    • Pairing the VDA to the correct vehicle in Fleet Admin.

    • Monitoring adapter status and health.

  • Drivers see the effects of the VDA (ADSC, mileage, connection status) but typically do not handle the hardware.