Volkswagen has discontinued external access to a programming interface used by third-party applications to monitor electric vehicle charging status and remotely control charging functions, a move that could impact owners who rely on smart energy management systems.
The change affects the automaker’s “Brand App Interface,” which previously enabled external software platforms to access selected vehicle data from Volkswagen Group electric vehicles, including models sold under the Volkswagen, Audi, Cupra and Škoda brands.
Volkswagen announced the change in early April, with implementation taking place during calendar week 21, between May 18 and May 24.
Third-Party Applications Lose Access
Application Programming Interfaces, commonly known as APIs, allow software applications to exchange information and interact with one another.
In Volkswagen’s case, the interface enabled charging management platforms and smart home systems to retrieve information such as battery state of charge and initiate or manage charging sessions without direct access to a vehicle’s onboard systems.
With the closure of the interface, many third-party applications can no longer access vehicle data or charging controls.
The change is expected to be particularly disruptive for owners using software designed to optimize charging based on surplus electricity generated by residential solar photovoltaic systems.
Impact on Smart Charging Users
Among the affected platforms is EVCC (Electric Vehicle Charge Controller), an open-source smart charging solution widely used to coordinate vehicle charging with home energy production.
For some users, the loss of battery state-of-charge information may be a minor inconvenience. However, for customers who rely on automated charging strategies tied to solar generation, the change could limit functionality and reduce energy optimization capabilities.
The move effectively prevents many independent software developers and open-source projects from maintaining direct integration with Volkswagen Group vehicles.
Shift Toward Approved Partnerships
Volkswagen indicated that several charging data providers had already integrated a new interface before the previous system was closed.
The company said ten charging service providers had connected to the new platform by early April.
The development suggests Volkswagen intends to limit access to approved commercial partners rather than supporting open-access integrations.
Under the new approach, vehicle data and charging functionality are expected to be available primarily through officially authorized providers.
Following a Broader Industry Trend
Volkswagen’s decision mirrors a similar move by BMW in 2025.
Last year, BMW restricted access to unofficial vehicle interfaces that had been created through reverse-engineering efforts. The company cited concerns related to cybersecurity, data protection and vehicle security.
Following those changes, access to BMW vehicle data became largely dependent on commercial partnerships with approved service providers and data aggregators.
Companies including Volteras and clever-PV have already announced partnerships with both BMW and Volkswagen, positioning themselves as authorized channels for vehicle data integration.