Understanding EV Software Interoperability for Scaling Charging Infrastructure

Saurabh Singh July 28, 2023
EV software interoperability

The rapidly growing electric vehicle market is the reason for driving significant investment in the EV charging infrastructure that is required to support it. While most charging currently occurs at home and work, public infrastructure is necessary to encourage more customers to consider EVs as a practical option.

A vast network of public charging ports is necessary to meet this growing demand, with almost 1 million needed in the US alone by 2030. However, fewer than 100,000 ports are currently available, with limited access and use. Thus, EV interoperability and standardization will be crucial to enabling a multi-stakeholder approach to planning, investment, and operation of public charging infrastructure as it scales to meet consumer demands.

Enhancing the overall charging experience necessitates facilitating EV drivers in easily locating and utilizing charging stations. Augmented interoperability and standardization of EV charging infrastructure is responsible for simplifying the issues related to EV charging, which are crucial for the widespread acceptance of EVs across the globe.

It is vital to understand that the next-generation of EVs will have to adhere to the protocols for EV software interoperability including OCPP (Open Charge Point Protocol), OCPI (Open Charge Point Interface), ISO 15118, CHAdeMO, CCS (Combined Charging System), etc, the details of which will be discussed later in the blog.

According to Grand View Research, the electric vehicle charging infrastructure ecosystem in the US was valued at a market share of $19.67 billion in 2022, further expected to witness a CAGR of 25.5% from 2023 to 2030.electric vehicle charging infrastructure market

Innovation of technology is the primary reason for this growing market. However, it also poses risks that can be managed by proving new technologies’ safety, reliability, and usability. This is where standards of development become crucial for the electric vehicle industry’s health and growth.

The development of EV charging infrastructure can be accelerated through industry-wide support of open standards, along with cross-platform EV software interoperability testing and validation.

This article will help you understand everything related to EV software interoperability, its importance, and best practices. So, without further ado, let’s start by understanding the crux of EV charging software interoperability.

streamline your EV charging infrastructure by integrating EV software interoperability

Comprehending EV Charging Software Interoperability 

EV software interoperability is the compatibility of the fundamental electric vehicle charging infrastructure components such as the grid, charging network, charging station, and EV with the supporting software system that enables them all to operate cohesively and seamlessly. This compatibility allows for efficient and effective EV charging, resulting in a more user-friendly and reliable experience for electric vehicle drivers.

Electric vehicle drivers need to have easy access to the nearest charging stations. They should be able to receive accurate information regarding the charging process, such as its pricing, availability, and estimated charging time-based on their EV model. 

Furthermore, interoperability between different charging software systems is crucial for efficient capital investment and optimal utilization of resources and infrastructure. This approach also enables EV integration with the grid more effectively, promoting a sustainable and reliable power ecosystem. 

Over the past few years, extensive research and stakeholder engagement has demonstrated that implementing interoperable, transparent, and open standards-based public EV charging infrastructure can offer potential benefits. This includes enhancing the overall customer experience, promoting efficient capital investment, enabling more optimal EV-grid integration, and supporting EV adoption. 

Importance of EV Software Interoperability

Software Interoperability enables EV drivers to access charging stations operated by different providers through a single application. This simplifies their experience and addresses concerns about range and charging access. Interoperability is made feasible through agreements between market performers, such as charge point operators (CPO), mobility service providers (MSP), and other roaming platforms.

One of the benefits of cross-platform EV software interoperability is enhancing the overall customer experience and promoting wider adoption of electric vehicles. Furthermore, it reduces the risk of fragmentation and compatibility issues in the EV charging market, making way for a seamless and user-friendly experience for EV drivers. 

The importance of EV software interoperability not only limits the facilitation of the development of open standards and interoperable software systems but also promotes sustainable and efficient electric power ecosystems, benefiting the EV industry widely.

Let’s move ahead and look at the open standards for developing software solutions for interoperable EVs and why adhering to these standards is necessary for the stakeholders that wish to invest in EV charging infrastructure development. 

Understanding the Open Standards for EV Software Interoperability 

The open standards for electric vehicle (EV) software interoperability are a set of protocols, technical specifications, and guidelines that enable seamless communication and information exchange between different components of EV charging infrastructure. These standards ensure that EV charging components can work together effectively regardless of their manufacturer or provider.

Implementing these standards promotes interoperability and compatibility among various EV charging systems, including charging stations, networks, vehicles, and supporting software systems. Using open standards facilitates the development of software systems that can seamlessly integrate with different EV charging components, thereby reducing the risk of fragmentation and compatibility issues in the EV charging market.

In addition, open standards can foster innovation and competition among manufacturers, leading to a wider array of charging options across the area and an enhanced user experience for EV drivers. Furthermore, adopting open standards promotes optimal utilization of resources and infrastructure, resulting in overall cost reduction and support for sustainable growth of the electric power ecosystem.

Now, open standards for interoperability lays the foundation for the development of protocols for EV software interoperability that is responsible for bridging the communication between EV charging components. Let’s look at them in detail below. 

Protocols for EV Software Interoperability 

The protocols for electric vehicle (EV) software interoperability encompass a collection of regulations, processes, and technical specifications that establish the guidelines for how various components of EV charging infrastructure can communicate and exchange information. These protocols guarantee that EVs can charge at any charging station, regardless of the manufacturer or provider, and that drivers can easily access charging information and services.Key protocols for EV software interoperability

OCPP (Open Charge Point Protocol)

This protocol is used for communication between the backend and the EV charging stations, enabling the latter to be managed remotely. 

The main goal of OCPP is to create a standardized communication interface between EVSEs and CMSs, which guarantees efficient and secure interaction between them. By standardizing the networks of EV charging stations, it becomes possible to integrate charging stations from various manufacturers, allowing EV owners to charge their vehicles at any station, regardless of the brand, without any compatibility concerns. This standardization also ensures the charging process is reliable and safe for all users.

OCPI (Open Charge Point Interface)

This protocol facilitates communication between multiple charging networks, allowing EV drivers to access charging stations across different networks.

ISO 15118

The ISO 15118 protocol facilitates communication between the electric vehicle and the charging station, enabling smart charging and other advanced features. Its development was aimed at supporting smart charging and advanced features such as Plug and Charge, which eliminates the need for any additional steps by the driver to authenticate and authorize a charging session.


The CHAdeMO communication protocol is utilized for electric vehicles and charging infrastructure to facilitate high-power DC fast charging. This protocol enables the communication between the EV and the charging station, allowing for bi-directional power transfer and vehicle-to-grid (V2G) functionality. With a fast charging capacity of up to 400 kW, CHAdeMO is widely used in Japan, Europe, and other regions.

CCS (Combined Charging System)

The CCS protocol facilitates EV models and charging infrastructure interoperability. It is an open standard developed by automakers and charging equipment manufacturers. The CCS protocol supports AC and DC charging, allowing for charging rates of up to 350 kW. This protocol is commonly used in North America and Europe for fast-charging DC.

Utilizing these protocols enables EV charging infrastructure components to communicate and exchange information seamlessly, promoting interoperability and compatibility across various systems and networks. Furthermore, these protocols encourage innovation and competition, benefiting EV drivers by providing them with a wider range of charging options and a better user experience.

Reasons for Adhering to Open Standards for EV Software Interoperability

Adhering to open standards for EV software interoperability is essential for several reasons. Let’s take a look at them in detail. 

Promoting wider adoption of EVs

The adoption of interoperable software systems can facilitate the charging of electric vehicles, irrespective of the charging station or network utilized. This, in turn, can promote the widespread use of EVs and expedite the transition to a more sustainable transportation system.

Avoiding compatibility issues

Adopting open standards can be a constructive measure in mitigating compatibility issues and establishing compatibility between various components of the EV charging infrastructure. This, in turn, can significantly enhance the overall user experience and reduce the likelihood of frustration among EV drivers.

Encouraging competition and innovation

Open standards have the potential to foster a competitive environment in the EV charging market. They can promote innovation and reduce costs by providing a level playing field for various manufacturers and service providers. In turn, this can improve the quality of EV charging services available to consumers.

Supporting grid integration

Incorporating interoperable software systems can facilitate integration with the electrical grid, promoting sustainable and efficient use of renewable energy sources. Implementing such systems can effectively reduce greenhouse gas emissions, fostering a more environmentally conscious and sustainable energy system.

EV Software Interoperability Challenges

Ensuring that different software systems can communicate and work together seamlessly is a complex task that requires careful planning and coordination. Factors such as different data formats, communication protocols, and security requirements must all be considered to ensure EV software interoperability is achieved. Here are a few cloud-based EV software interoperability challenges that a dedicated EV software development company can solve: 

Challenges Associated with EV Software Interoperability


The EV charging market is fragmented, with a plethora of charging station manufacturers, network providers, and software systems. This fragmentation can result in compatibility issues, challenging ensuring interoperability across different systems.

Lack of standardization

There exist numerous protocols for EV software interoperability. However, it is important to note that there is no universal standard that all manufacturers and providers follow. This lack of standardization can challenge ensuring effective communication between different systems.


Maintaining the security and integrity of EV software systems is critical due to the potential susceptibility of interoperable systems to cyberattacks and other security threats. It is imperative to ensure that EV software systems remain secure to maintain user trust and promote wider EV adoption.


The development and implementation of interoperable software systems can prove costly, particularly for smaller entities within the market. As a result, barriers to entry can be created, which in turn limits competition and ultimately hinders the growth of the EV charging market.

To overcome the obstacles ahead, it is imperative that the various stakeholders in the EV charging market, such as manufacturers, network providers, software developers, and policymakers, collaborate and cooperate. The industry can encourage widespread EV adoption and contribute to a more sustainable future by developing open standards and interoperable systems.

Stakeholders Benefiting from EV Software Interoperability

Here are the stakeholders that are impacted by adopting robust cloud-based EV software interoperability solutions: 

Stakeholders that can benefit from EV software interoperability

EV drivers: Interoperable EV software systems directly impact EV drivers. By enabling easier charging at various stations and networks, drivers can experience improved usability and reduced compatibility issues. It is important to prioritize the implementation of interoperable software to enhance the EV user experience.

Charging stations and network operators: EV software interoperability profoundly affects charging stations and network operators. By facilitating a broader range of customers and more efficient use of charging infrastructure, these systems enable operators to optimize their services. 

EV manufacturers: EV manufacturers are impacted by EV software interoperability, as interoperable software systems can promote wider adoption of EVs and reduce the compatibility risks and issues that are responsible for causing frustrations among their customers.

Utilities and grid operators: The impact of EV software interoperability extends to utilities and grid operators, as interoperable software systems can facilitate the efficient and sustainable utilization of renewable energy sources and aid the integration of EVs with the electrical grid.

EV Software Interoperability Best Practices

EV software platform interoperability best practices involve adhering to open standards, using well-defined protocols, and ensuring security and privacy in developing the EV charging software. Let us look at various ways with which you can achieve EV interoperability:

Best Practices for Implementing EV Software Interoperability

Developing and adhering to open standards

It is necessary to follow guidelines and protocols that facilitate interaction and communication between different components of an EV charging infrastructure, regardless of their manufacturer or provider.

Collaborating with stakeholders

Software interoperability can also be achieved by working closely with stakeholders like EV manufacturers, charging infrastructure providers, grid operators, etc. This can ensure that all the involved parties understand the importance of interoperability and are willing to make the necessary investments to achieve it.

Testing and certification

It is necessary to conduct rigorous quality assurance to ensure that EVs and charging infrastructure components are interoperable and have been designed per the established standards.

Regular updates and maintenance

It is vital to update the open standards and EV charging infrastructure protocols to stay parallel with the latest technological advancements. Furthermore, it is also necessary to keep track of the charging infrastructure and maintain and update it. 

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How Can Appinventiv Help You Achieve EV Charging Software Interoperability?

EV charging software interoperability is vital for promoting the wider adoption of EVs nationwide and supporting sustainable electric power ecosystem development. Furthermore, it is important to enhance the customer experience, reduce fragmentation and compatibility issues, and enable efficient use of resources. The support for developing open standards and interoperable software systems further benefits the EV charging industry.

Appinventiv is a dedicated organization that specializes in EV Charging Software Development. Our experts strive to offer robust solutions for the automotive industry, including EV software platform interoperability. We can leverage our expertise and industry knowledge to help businesses achieve seamless communication between different components of their EV charging infrastructure. Our custom eMobility solutions can ultimately enhance the user experience and promote wider adoption of electric vehicles.

Get in touch with our team to develop interoperability solutions for EV charging infrastructure that meets the open standards.


Q. What is EV software interoperability?

A. EV software interoperability is the seamless exchange of information between EV charging infrastructure components, regardless of their manufacturer or provider, through adherence to open standards and protocols. It enhances the user experience, encourages wider adoption of electric vehicles, and supports efficient resource and infrastructure utilization. It is further important that EV charging infrastructure components adhere to these standards and protocols to ensure the continued growth and success of the electric vehicle industry.

Q. How does EV software interoperability work?

A. EV software interoperability is the key to seamless communication and information exchange between the electric vehicle (EV) charging infrastructure components. Open standards and protocols ensure compatibility and interoperability between software systems and devices. The ISO 15118 protocol is an excellent example of this, enabling communication between the EV and the charging station and allowing for smart charging and other advanced features.

Q. How much does it cost to implement EV charging software interoperability?

A. Various factors, such as project scope, system type, customization requirements, etc., influence the overall cost of implementing EV charging software interoperability. However, investing in open standards and interoperable software systems can save long-term costs by reducing the need for proprietary systems and streamlining maintenance and upgrades. 

Saurabh Singh
CEO & Director
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