EV Charging Software Experts in OaaS & Custom Solutions

Purpose-Built EV Charging Software Experts

Charging is what we do. All we do. S44 Energy is a dedicated EV charging software company with a distributed team across the U.S. and Germany. We apply deep industry expertise to create solutions that help charge point operators (CPOs), fleets, and infrastructure providers take control of their networks.

We authored CitrineOS, the open-source CSMS project now backed by Linux Foundation Energy—and built TopazEV, our Open-as-a-Service (OaaS) platform, to help clients move beyond rigid SaaS models. Our team also provides strategic consulting and custom development services to implement and extend CitrineOS-based solutions for full network ownership and long-term scalability.

From interoperability to innovation, we’re shaping the future of EV charging—one line of code at a time.

The Smarter Way to Scale Your EV Charging Network

The Future of EV Charging is Coming Soon

TopazEV is the first Open-Source as a Service (OaaS) platform for EV charging—offering flexibility, security, and cost control without vendor lock-in. Built on CitrineOS and certified for OCPP 2.0.1, it supports OCPI roaming, ISO 15118 Plug & Charge, and OCPP 1.6 compatibility to future-proof your network.

Mission
S44 Energy’s mission is to build open, adaptable, and real-world-ready software solutions that empower the growth of EV charging infrastructure—at any scale and for any operator. We combine deep protocol expertise, product thinking, and hands-on industry experience to help our clients deploy charging networks that are reliable, flexible, and future-ready.
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‍Vision
Our vision is to accelerate the transition to a more sustainable, accessible, and resilient transportation future by removing the software barriers to EV adoption and ensuring charging infrastructure can scale without compromise.

Fast Scaling EV Charging Network

Our Tailored Backend Solution for Optimized EV Charging

Digital Tools Streamline HVAC Installations

Intuitive Heat Pump Tool

EV Charging Native Mobile App

Electric Car Charging at Your Fingertips

Digital Twin: Energy Distribution Virtual Model

No More Waste in Energy Generation

S44 Energy Leadership Team

Olga Haygood

CEO

Thana Paris

Head of Product/Director of Open-Source

Jason Cardosi

Head of Sales & Partnerships

Open Roles at S44 Energy

Currently, we don't have any open positions, but we're always on the lookout for talented individuals. Check back later or feel free to reach out.

Let’s Build Something
Great Together

Latest S44 Energy Articles

S44 Energy Advances LF Energy’s CitrineOS with OCPP 1.6 Support, Boosting EV Charging Network Management

CitrineOS, the open-source CSMS developed by S44 Energy and adopted by LF Energy, has released version 1.6.0 with expanded support for OCPP 1.6—enabling broader compatibility with legacy EV chargers. The update includes a redesigned operator UI, support for both OCPP 1.6 and 2.0.1, and key technical enhancements like GraphQL integration and S3-compatible storage. This milestone makes CitrineOS even more flexible and future-ready for EV charging networks. LFE and S44 Energy hosted a public webinar previewing the new features.

CitrineOS Earns OCPP 2.0.1 Certification, Advancing Open-Source EV Charging

MAHWAH, NJ — JANUARY 28, 2024 – S44 Energy, the developer behind CitrineOS, an open-source Charge Station Management System (CSMS) and a Linux Foundation Energy project, proudly announces that CitrineOS has achieved OCPP 2.0.1 Core & Advanced Security certification from the Open Charge Alliance.

S44 Energy: 2024 Year in Review – Driving the Future of EV Charging with CitrineOS, Open-Source Innovation, and Custom Solutions

As 2024 comes to a close, S44 Energy reflects on an incredible year of growth, innovation, and milestones for CitrineOS, our open-source Charge Station Management System (CSMS). From expanding our capabilities to helping clients transition away from restrictive SaaS solutions, we’ve made significant strides in empowering the EV charging industry. In this blog, discover how CitrineOS is driving the future of EV charging, offering both open-source and custom solutions to build scalable, future-proof infrastructure for Charge Point Operators worldwide.

LF Energy CitrineOS 1.3.0 Revolutionizes EV Charging Management with Enhanced Features and Open Source Innovation

SAN FRANCISCO — JULY 16, 2024 — LF Energy, the open source foundation focused on harnessing the power of collaborative software and hardware technologies to accelerate the energy transition, announces the release of LF Energy CitrineOS 1.3.0. This new release marks a significant advancement in CitineOS’ implementation of an Open Charge Point Protocol (OCPP) 2.0.1 compliant Charging Station Management System (CSMS). S44 Energy, a global leader in EV charging solutions, lead contributions to the latest version as part of an open source community developing CitrineOS. This underscores S44 Energy’s commitment to driving innovation and scalability within the electric vehicle charging industry.

S44 Energy Joins Open Charge Alliance, Shares Mission and Focus on Advancing EV Charging Standards

S44 Energy, a leader in revolutionizing global EV charging experiences, announces its membership in the Open Charge Alliance (OCA). The OCA is dedicated to advancing global development, adoption, and compliance of communication protocols within the electric vehicle (EV) charging infrastructure through collaboration, education, testing, and certification.

Revolutionizing EV Charging with Scan-N-Charge

Ever been on a long road trip with your electric vehicle and finally found an available charging station, only to realize your charging network card isn’t accepted? You try your credit card, but the hardware’s too finicky. You call customer service, and they suggest downloading an app and registering. At this point, all you want is a simple way to charge your car without jumping through hoops, the way it used to be at the gas pump! Enter Scan-N-Charge, a seamless solution designed to make EV charging as simple as scanning a QR code. This innovative project, developed by our team at S44, exemplifies the kind of user-friendly, tech-forward solutions we specialize in.

Transforming Electric Heavy-Duty Trucking with Open Source

The shift to electric power is revolutionizing the transportation industry, especially for long-haul trucks. Four key stakeholders—governments, truck manufacturers, charger manufacturers, and CSMS companies—have significant interests in electrification. The U.S. government's (Transition to Zero-Emission Heavy-duty Vehicles) and the EU's (AFIR) initiatives demonstrate government support, addressing key challenges like charging infrastructure, costs, grid impact, and en-route charging.

Is Proprietary EV Charging Software Throttling EV Adoption?

EV adoption at scale is highly reliant on government-funded and -supported infrastructure. Consider the endless miles of gas stations that fuel America’s cities and highways today. Each gas station’s infrastructure is standard and can be operated by any gas company. If British Petroleum moves out, ExxonMobil can take over, never leaving drivers without access to gas. This is because the U.S. government recognizes gas stations as critical infrastructure.

Three EV Charging Trends for 2024

As more drivers embrace electric vehicles (EVs), innovative car and charging solutions are hitting the streets. Manufacturers, distributors and drivers all have something to gain, whether it’s from new technology, improved compatibility or the adoption of industry-wide standards. Let's take a look at the EV charging and driving trends that will take hold in 2024 and beyond.

Webinar Follow Up: How Open-Source Software is Revolutionizing EV Charging

In our first webinar, we discussed how CitrineOS can help to upgrade EV charging networks to the OCPP 2.0.1 standard. In our newest blog post, Thana Paris, our Director of Open Source Program, answers your most asked questions in detail.

Understanding the Tech Tipping Point for Emerging Markets

Thana Paris discusses how standards, accessibility, and user-centric focus shape the path to seamless innovation in this article on Spiceworks.

S44 2024 Prediction: EV Chargers Will Be Powered by Open Source

Thana Paris joins industry experts who share predictions for 2024. Read her thoughts on the future of EV charging in the 16th annual VMblog.com series.

Let’s Build Something
Great Together