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Bidirectional Charging Management (BCM) pilot project enters key phase: customer test vehicles with the ability to give back green energy.

+++ As announced: 50 BMW i3 handed over to customers with new technology +++ Vehicle handover at BMW Welt in Munich +++ Strong interest from customers +++

Mobility of the future

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Bernhard Ederer
BMW Group

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 ### Start of the joint press release from all partners mentioned herein ##

Munich. The first vehicles for the customer pilot phase were handed over to their users at BMW Welt on 9 July. This means that customers are now in possession of 20 BMW i3 cars equipped with the new technology, with a further 30 due to be delivered to business users in the coming weeks.

The “Bidirectional Charging Management – BCM” consortium research project launched in May 2019 brings together companies and institutions from the automotive, charging infrastructure, energy and scientific sectors. They have teamed up to develop technological solutions for making electric mobility even easier and cheaper for users, with even lower emissions.

By adopting a holistic approach, the project aims to interlink vehicles, charging infrastructure and power grids for the first time in a way that facilitates the use of renewable energy – and at the same time increases power supply reliability. The research project will run for three years under the aegis of the German Aero-space Centre and with funding from the German Federal Ministry for Economic Affairs and Energy.

Start of testing under everyday conditions.
Not only will electric vehicles with bidirectional charging capability be able to draw electrical power for their high-voltage battery when plugged into a compatible charging station or wallbox, they will also have the ability to reverse the process and feed energy back into the distribution network operator’s power grid. This will effectively turn the electric vehicles’ batteries into mobile energy storage devices that can also supply electricity when required. Integrating as many electric vehicles as possible into the power grid in this way calls for myriad innovations in terms of vehicle technology, charging hardware, charging management, communication interfaces with energy sector stakeholders and legal parameters.
Bringing about these advances is the task of the research project, in which the BMW Group is acting as consortium leader. It is joined by KOSTAL Industrie Elektrik GmbH (development of charging hardware), KEO GmbH (software provider for connecting the customers systems with energy suppliers), transmission network operator TenneT and distribution network operator Bayernwerk Netz GmbH (both energy system services), the Research Institute for Energy and Research Association for Energy e.V. (both FfE research into energy system and grid repercussions as well as measurement data evaluation), the Karlsruhe Institute of Technology (KIT; research into electricity market and grid repercussions) and the University of Passau (user research).

The pilot customers will now be the first to benefit from this new technology package. It essentially consists of the in-vehicle and backend technology (BMW), the intelligent wallbox (KOSTAL) and the networking for interconnecting the electric car, wallbox and electrical installation in the customer’s building with the power grid (Bayernwerk, KEO and TenneT). The first effect of this that impacts customers directly will be the maximisation of energy generated from their own photovoltaic system in their consumption pattern, resulting in a sizeable reduction in electricity costs.

This will be supplemented in a second stage by vehicle-to-grid (V2G) functionality, meaning that customers will engage in new business models for energy trading and power grid stabilisation. Stage three will extend the trial to customers with fleets of electric cars, who will use their vehicles as short-term storage devices for eliminating power consumption peaks in the daily load cycle.

The task of harmonising interaction between the individual components and both existing and future communication standards – to ensure seamless overall functioning – proved to be the main technical challenge when devising this package. The vehicle development methods and processes built up by the BMW Group and the unwavering commitment of all project partners enabled the successful integration of such an intricate multi-stakeholder system, including testing and validation.

Test phase for B2B customers via Alphabet

The first B2B customers are also among the test users for the pilot phase. They were enlisted for the project with the assistance of Alphabet Fuhrparkmanagement GmbH, a wholly owned subsidiary of the BMW Group. Alphabet has been helping customers electrify their vehicle fleets since 2013. The company uses its total e-mobility solution AlphaElectric to provide support for customers throughout the entire electrification process – from a needs analysis and creation of a suitable model strategy, through to implementation of charging solutions and intelligent billing options. The portfolio of services also includes providing additional advice on how to draw up an appropriate eCar Policy, for example, or optimum charging and load management. In addition, customers can also lease charging solutions through Alphabet.

Expanding electric mobility enhances power supply reliability.
As the number of electric vehicles on our roads continues to expand, the amount of electric power required is going to increase in the long term. At the same time, there will be a growing need to control energy flows intelligently as this is the only way of making optimum use of electricity from renewable sources.

In response to this challenge, the BMW Group teamed up with power grid operator TenneT to develop an innovative solution as part of a preparatory project in Germany that allows the charging strategy for electric vehicles to factor in the customer’s mobility schedule, the availability of green electricity and the current load on the power grid. The intelligence required for local networking is supplied by Bayernwerk and KEO.

In practice, this means plugged-in vehicles can suspend and later resume charging when prompted by signals from the distribution or transmission network operator. The bidirectional charging technology (for backfeeding power) now being explored could lead to even greater benefits. Indeed, it allows parked electric vehicles hooked up to a charging station or wallbox to be used as flexible, mobile energy storage devices.

During periods of particularly high demand for electricity, these vehicles are able to feed additional power into the grid, while their high-voltage batteries are mainly charged at times when electricity from renewable sources is available or overall demand is lower. And the stored energy can, in turn, be deployed exactly when needed, whether for electric driving or boosting power grid capacity.
Bidirectional charging assists the energy revolution.
As well as improving power supply reliability, intelligently controlled integration of electric vehicles into the power grid can also further increase the proportion of renewable energy in Germany’s overall electricity consumption. By utilising the storage capacities made available in the high-voltage batteries of electrified vehicles, supply and demand for green power can be reconciled more effectively.

In this way, the batteries in electric vehicles can be used to effectively absorb the peaks in wind and solar power generation, for example, and then release the stored renewable energy again at times of low renewable power generation (night, still weather), while always making allowance for the customer’s driving requirements. This can reduce the need to ramp up power generation at fossil fuel power stations and increase their emissions during such periods, adding further depth to the role of electric mobility as an intrinsic element of the energy revolution. Its continued spread serves to lower CO2 emissions both from mobility-related sources and when generating electricity.

All-encompassing approach.
Nowhere else beyond the BCM project has such an all-encompassing approach been adopted. All the relevant elements and variables for normal operation down the line are being considered from a holistic perspective and aligned. This means the interaction between the charging hardware in the vehicle and at the charging point, the accompanying digital services, plus the role of the networks at all levels.

Regulatory framework conditions and smart meter gateway as a new component at the grid connection ensure secure communication between energy suppliers and electric vehicles.
The legal and regulatory parameters will also be evaluated during the pilot phase. As far as the domestic use of bidirectional charging management by customers is concerned (“vehicle to home” or V2H), the project partners have released an initial position paper showing that V2H is already allowed for by current German legislation. Analyses are now being carried out of the potential network- and market-oriented uses under today’s regulatory framework.

Focussing on value for the customer.
The University of Passau (user research), Research Institute for Energy (FfE) and Research Association for Energy (both energy system analysis) and the Karlsruhe Institute of Technology (KIT; research into electricity market and grid repercussions) are evaluating the financial and ecological benefits for customers along with the user-friendliness of the specific bidirectional use cases.
Bayernwerk and BMW use the internationally established EEBUS standard for this purpose. KEO GmbH has implemented the technical implementation of the communicative connection of customer households via the smart meter gateway to the energy supply. The BDL project provides important impulses for the digitalization of the energy transition and shows possibilities for the practical implementation of the current regulatory questions.

The FfE is making a special contribution in the form of the “FfE joint project”, which also gets the following stakeholders from the energy sector and industry involved in the research project: Bayernwerk AG, IAV GmbH, illwerke vkw AG, E.ON Group Innovation GmbH, LEW Verteilnetz GmbH, rhenag Rheinische Energie AG, Stadtwerke München GmbH, SOLARWATT GmbH, TransnetBW GmbH, Uniper SE, Viessmann Werke GmbH & Co. KG. As a result, experiences can be shared, standardisation work accelerated and solutions devised that are widely accepted.

This will create a platform for subsequently implementing the technology across the board and so integrate electric mobility into Germany’s power grid.

 # End of the joint press release from all partners mentioned herein ###

It is clear to the BMW Group that following an all-encompassing approach and placing the focus firmly on the customer are important success factors for the future of individual mobility.

“Thanks to our expertise in the development of charging technology for electric vehicles, we also provide support for innovative technological solutions like bidirectional charging,” says Frank Weber, Member of the Board of Management of BMW AG, Development. “This makes electric vehicles part of an enormous energy storage system and enables them to play a key role in the energy revolution. Continuing to drive the widespread rollout of electric mobility is of fundamental importance for us at the BMW Group. By making huge storage capacities available in fleets of electric vehicles, bidirectional charging could be an important factor in eventually ending our dependence on fossil fuels.”

Electric offensive in full swing
Thanks to intelligent vehicle architectures and a highly flexible production network, the BMW Group will have around a dozen all-electric models on the road as early as 2023. In addition to the BMW i3*, MINI Cooper SE* and BMW iX3* models already on the market, two key drivers of innovation will be brought out this year in the form of the BMW iX* and BMW i4* – with the BMW i4 actually making its debut three months earlier than originally planned.

All-electric versions of the high-volume BMW 5 Series and the BMW X1 are set to follow in the next few years. These will be joined by a fully electric BMW 7 Series, an electric version of the next MINI Countryman and other models besides. As a result, the BMW Group will have at least one all-electric model on the road in around 90 per cent of its current market segments by 2023.

The BMW Group will increase sales of all-electric models by an average of significantly more than 50 per cent a year from now until 2025 – meaning sales will grow more than tenfold compared to 2020. The company will have delivered a total of around two million all-electric vehicles to customers by the end of 2025.
Based on current market forecasts, the BMW Group expects all-electric vehicles to account for at least 50 per cent of its global sales in 2030. This means the company will put a total of about ten million all-electric vehicles on the road over the next ten years or so. The BMW Group’s strategy is therefore on course to meet the EU’s ambitious carbon reduction targets for 2025 and 2030.



BMW i3s: Fuel consumption combined: 0.0 l/100 km; electric power consumption combined: 16.6 – 16.3 kWh/100 km (WLTP); CO2 emissions combined: 0 g/km.
MINI Cooper SE: Fuel consumption combined: 0.0 l/100 km; electric power consumption combined: 17.6 – 15.2 kWh/100 km (WLTP); CO2 emissions combined: 0 g/km.
BMW iX3: Fuel consumption combined: 0.0 l/100 km; electric power consumption combined: 19.0 -18.6 kWh/100 km (WLTP); CO2 emissions combined: 0 g/km.
BMW i4 M50: Fuel consumption combined: 0.0 l/100 km; electric power consumption combined: 24 - 19 kWh/100 km (WLTP); CO2 emissions combined: 0 g/km. (estimated, not yet official data)
BMW iX xDrive50: Fuel consumption combined: 0.0 l/100 km; electric power consumption combined: 23.0 – 16.8 kWh/100 km; CO2 emissions combined:
0 g/km.

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CO2 emission information.

Fuel consumption, CO2 emission figures and power consumption and range were measured using the methods required according to Regulation VO (EC) 2007/715 as amended. They refer to vehicles on the German automotive market. For ranges, the NEDC figures take into account differences in the selected wheel and tyre size, while the WLTP figures take into account the effects of any optional equipment.

All figures have already been calculated based on the new WLTP test cycle. NEDC figures listed have been adjusted to the NEDC measurement method where applicable. WLTP values are used as a basis for the assessment of taxes and other vehicle-related duties which are (also) based on CO2 emissions and, where applicable, for the purposes of vehicle-specific subsidies. Further information on the WLTP and NEDC measurement procedures is also available at

For further details of the official fuel consumption figures and official specific CO2 emissions of new cars, please refer to the “Manual on the fuel consumption, CO2 emissions and power consumption of new cars”, available at sales outlets free of charge, from Deutsche Automobil Treuhand GmbH (DAT), Hellmuth-Hirth-Str. 1, 73760 Ostfildern-Scharnhausen and at

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