Company

A global electric vehicle charging network operator — providing end-to-end charging solutions including hardware, software, and services to car manufacturers, fleet owners, enterprises, and consumers. Starting as a startup in 2015 and becoming a full subsidiary of a major energy company in 2017, the business had grown to over 300,000 charging points across more than 33 countries, with transaction volumes doubling year on year.

Situation

The growth trajectory was outpacing the billing infrastructure. Fleet operators — companies managing hundreds of vehicles and employees charging across the network — expected a single consolidated invoice covering both their card subscription fees and every charging session their employees completed. What had been manageable at lower volumes had become an operational constraint: manual billing processes could not keep pace with the 2x annual transaction growth, and the complexity of combining two distinct fee types into one accurate invoice had no automated solution.

Challenges

• Transaction volumes were doubling every year. Manual billing processes that had served the business at lower scale were breaking down — the team was processing more exceptions than invoices.
• Two fundamentally different fee types needed to appear on one invoice. Card subscription fees and per-session charging fees came from separate systems, in different formats, and with different billing cycles — reconciling them manually was error-prone and unsustainable.
• Duplicate charging session records arriving via Kafka had no systematic deduplication. Without a reliable filter, billing accuracy could not be guaranteed at scale.
• B2C and roaming partner billing were waiting behind B2B. Getting the automated foundation right for fleet invoicing was a prerequisite for expanding the model to consumer and third-party network roaming scenarios.