In the context of accelerated digital transformation and increasing pressure around energy efficiency and sustainability practices, data centers play a critical role in providing operational continuity for modern organizations. For ICT service providers with extended operations, modernizing critical infrastructure is no longer optional, but a strategic necessity.
Powering Mission-Critical ICT Operations in a Multi-Country Environment
Headquartered in Greece, Uni Systems, a member of Quest Group, is one of the leading Information and Communications Technology (ICT) providers, with more than 60 years of experience across European and international markets. The company operates in over 20 countries and relies on the expertise of more than 1,800 ICT professionals, serving critical sectors such as banking and finance, utilities, government, telecommunications, as well as European Union institutions and agencies.
Uni Systems’ data center supports both internal workloads and colocation environments, where high availability, reliability, and energy efficiency are essential to maintaining uninterrupted performance.
Overcoming Legacy Infrastructure to Improve Efficiency and Sustainability
After more than a decade of continuous operation, the existing data center infrastructure began to generate significant inefficiencies. Aging, energy-intensive equipment led to rising operational costs and an increased carbon footprint, putting pressure on the company’s sustainability objectives.
In this context, modernizing the power infrastructure became essential to reduce energy consumption, optimize overall efficiency, and maintain high availability without impacting business continuity.
A Scalable, High-Efficiency Power Architecture with Zero Downtime
Building on a long-standing partnership with Nigico S.A., Vertiv’s authorized partner in Greece, Uni Systems selected a modern power protection solution based on the Vertiv™ Liebert® APM2 modular uninterruptible power supply (UPS). Designed for mission-critical environments, the system delivers an optimal balance of scalability, reliability, and energy efficiency.
The new architecture integrates advanced technologies such as Insulated Gate Bipolar Transistor (IGBT) technology for efficient power conversion, silicon carbide converters to minimize energy losses, and a three-level topology that enhances overall efficiency. Its compact and scalable design also enabled significant space optimization within the data center.
The modernization process was completed with zero downtime, a critical requirement for a data center supporting essential applications and services. The modular approach allowed seamless integration into the existing infrastructure while enabling future scalability in line with evolving capacity requirements.
The importance of selecting an energy-efficient solution for critical applications is also underscored by the implementation partner: “Energy-saving technologies in data center operations keep evolving rapidly. As our main responsibility is to deliver cutting-edge technological solutions for critical applications, the energy-efficient Vertiv Liebert APM2 stands out as an advanced and reliable choice. For us and our customers, Vertiv represents reliability and innovation, offering end-to-end solutions that power critical infrastructure with efficiency and confidence,” highlights Dimitris Nomikos, Nigico SA, Chief Executive Officer.
Measurable Energy Savings, Lower Costs, and a Reduced Carbon Footprint
The benefits of modernization were both immediate and measurable. Uni Systems reduced power losses by more than 20 kW and achieved annual energy savings of approximately 235,000 kWh, resulting in a 15% reduction in operating expenses. At the same time, a 40% reduction in physical footprint allowed for more efficient use of data center space.
From a performance perspective, the upgraded UPS system delivers up to 97.5% efficiency in double-conversion mode and up to 98.8% in dynamic online mode, contributing to a lower Total Cost of Ownership (TCO) and positioning the project to achieve ROI within three years.
This project demonstrates how strategic investments in critical infrastructure can simultaneously support operational excellence and energy efficiency goals. By adopting advanced power technologies and collaborating with trusted partners, Uni Systems reinforces its position as a future-oriented ICT provider, capable of meeting the increasingly complex demands of the digital economy.
Modernizing power infrastructure is not merely a technological upgrade, but a core component of an integrated strategy, one that treats performance, efficiency, and environmental responsibility as interconnected elements of a single system.
