Open-as-a-Service & SaaS - Hybrid

TopazEV Charging Platform

TopazEV is a production-ready EV charging software platform and CSMS built by S44 Energy on the open-source CitrineOS foundation.Delivered as an Open-as-a-Service (OaaS) platform, TopazEV provides operators with a scalable, standards-based charging backend without the complexity of running their own infrastructure. TopazEV supports OCPP 1.6, 2.0.1, and 2.1 chargers.

Why We Built TopazEV

Organizations entering the EV charging market often face a difficult choice: adopt a rigid SaaS platform or build their own charging backend.

TopazEV was created to eliminate that trade-off.

By combining the open-source CitrineOS platform with a managed deployment model, operators can launch and scale EV charging networks while maintaining flexibility and control.
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Platform Highlights

Built on CitrineOS
An open-source CSMS developed by S44 Energy and adopted by Linux Foundation Energy.

Open Charging Standards
Compatible with OCPP 1.6, 2.0.1, and 2.1 chargers for multi-vendor interoperability.

Managed Deployment
Operators get a production-ready backend without deploying or maintaining infrastructure.

Open APIs
Integrate with energy systems, fleet platforms, and enterprise software.

Who It’s For

TopazEV is designed for organizations building or operating EV charging networks, including:

• Charge Point Operators
• Utilities and energy providers
• Fleet charging operators
• Real estate developers deploying charging infrastructure
• Hardware manufacturers building charging ecosystems