Enhancing an EV charging platform with flexible billing and payments

Innowise helped modernize SMART/LAB’s e-mobility platform by enhancing its billing, payment, transaction management, and reporting capabilities.

up to 50%

faster billing and payment processing

Enhancing an EV charging platform with flexible billing and payments

Industry Transportation, Fintech

Employees 51–200

Region Germany

Services Software enhancement

Client since 2022

Client overview

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SMART/LAB Innovationsgesellschaft mbH is a leading German e-mobility software provider that delivers charging infrastructure management, billing, and roaming solutions for energy providers and charging point operators across Europe.

Challenge

To support its growing network of charging providers and EV drivers, SMART/LAB needed to overcome several challenges related to billing, payments, and platform scalability.

Limited service offerings. The platform supported only one-time charging sessions, preventing the client from introducing subscriptions, long-term contracts, and flexible tariff plans.
Poor customer experience. Reliance on RFID cards and manual payment processes made charging less convenient for EV drivers.
Inefficient business operations. Limited invoicing and reporting capabilities increased administrative effort and reduced financial visibility.

Inflexible billing architecture. The existing system could not support contract billing, multiple tariff models, or loyalty programs.
Legacy payment workflows. The platform lacked integrated digital payment capabilities and automated billing processes.
Limited platform scalability. The solution was not designed to support a growing partner network, increasing transaction volumes, and future feature expansion.

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Solution

To help SMART/LAB support a growing network of charging providers, Innowise modernized the platform’s billing and payment ecosystem. The solution enables operators to offer subscription-based charging services, simplifies payments for EV drivers, and provides better visibility into financial operations.

SUBSCRIPTION-BASED CHARGING

One of the key enhancements was the introduction of a subscription billing module that enables charging providers and EV drivers to establish long-term charging contracts.

Instead of relying solely on one-time charging sessions, drivers can now subscribe to charging plans that best match their charging habits. The platform allows providers to configure flexible pricing models based on operators, roaming partners, charging point groups, or individual charging stations. Drivers can easily compare available offers, subscribe to a plan, and manage their contracts through the web or mobile application.

Once a contract is activated, users gain access to subscription details, transaction history, invoices, and refund information from a single interface. The new functionality also enables providers to introduce loyalty programs, allowing drivers to earn bonuses and redeem them for future charging sessions.

As a result, SMART/LAB can support a broader range of business models while offering charging providers greater flexibility in designing commercial offerings.

PAYMENT MANAGEMENT

One of the project’s key objectives was to simplify the payment experience for EV drivers while reducing the operational effort required to manage payment-related issues.

We redesigned the payment workflow by introducing OneClick payments, enabling users to securely save their payment methods and complete future charging sessions without repeatedly entering card details. In addition, the platform now supports card-free charging, allowing drivers to authenticate and start charging directly through the mobile application instead of using physical RFID cards.

To complement these improvements, we implemented an automated cashback mechanism. If a charging session cannot be completed successfully, users can request a refund directly through the platform, with reimbursement processed within approximately 20 minutes. This functionality improves customer satisfaction while reducing the workload for support teams.

FINANCIAL REPORTING AND PLATFORM ADMINISTRATION

To help SMART/LAB manage its growing charging network more efficiently, Innowise strengthened the platform’s billing, reporting, and administrative capabilities.

We enhanced the platform’s PAYONE integration by introducing automatic invoice generation and streamlining billing workflows. This allows SMART/LAB and its charging providers to create invoices and billing reports more efficiently while reducing manual financial operations.

To provide greater transparency, we redesigned the reporting module. Charging providers can generate reports on contracts, charging sessions, and transactions for selected time periods, providers, and charging points, giving them better visibility into business performance. At the same time, EV drivers can easily access their transaction history, payment statuses, invoices, and refund information directly through the platform.

We also improved platform administration by introducing detailed payment monitoring and notifications. Administrators can track every stage of the payment process, quickly identify failed transactions, and determine where an error occurred, significantly reducing troubleshooting time.

Finally, we optimized the accounting workflows for non-integrated charging providers by standardizing partner IDs and charging point data. This simplifies partner onboarding, improves data consistency, and enables SMART/LAB to continue expanding its charging network more efficiently.

The most rewarding part of this project was transforming a complex billing ecosystem into a seamless user experience. We focused on simplifying payments, improving financial transparency, and giving both charging providers and EV drivers the tools they need to manage charging services with confidence.

Ismail Sharyf Technical Lead

Technologies

Frontend

React JS

Backend

Java 25, Go, Spring Framework (Spring Boot, Spring Security, Spring Data MongoDB), Maven, JUnit, Lombok, MapStruct

Databases

MongoDB

Messaging

Nats

Cloud

Azure

Containerization and container management

Docker, k8s

Revision control systems

Git

DevOps

Azure DevOps

Team

Technical Lead

Back-End Developers

Front-End Developers

QA Engineer

Results

Project duration

May 2022 – Ongoing

EV drivers can now establish long-term contracts with any e-mobility service provider and select tariffs that suit their needs. As a result, users benefit from a range of bonus systems and convenient billing functionality.
Billing and payment processing became up to 50% faster through OneClick charging and automated payment processing, allowing drivers to start charging sessions faster while simplifying the overall user experience.
Service providers can efficiently manage contracts, payments, invoices, and reporting from a unified platform, reducing administrative effort and improving operational efficiency.
The enhanced solution strengthens the client’s market position by supporting partner network growth, accelerating service expansion, and improving the overall customer experience.

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