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Since 2012, S44 Energy has been at the forefront of revolutionizing EV charging experiences worldwide. With our distributed team spanning the U.S. and Germany, we specialize in developing cutting-edge software solutions for both customer-facing applications and back-end systems.

At S44 Energy, we’re committed to enhancing every aspect of EV charging—from empowering Charge Point Operators (CPOs) and e-Mobility Service Providers (eMSPs) with robust, intuitive solutions, to creating seamless native mobile applications and advanced back-office tools.

Our expertise in OCPI and OCPP standards positions us as strategic partners to pioneers in the EV charging industry. In late 2023, we proudly launched CitrineOS, the industry’s first OCPP 2.0.1 Open-Source CSMS solution, and we’re actively collaborating with the global EV charging community to drive its widespread adoption.

Cert. number OCPP Version Product type Product designation Certificate type Software version Date of registration
OCPP 2.0.1 Charging Station Management System CitrineOS Core + S 1.5.1 December 12th 2024

OCA at Pwn2Own Automotive 2026 in Tokyo

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