Liebert Vertiv – EXL S1 – 12000 – 12 kVA – Three Phase Online UPS

Vertiv™ Liebert® EXL S1 UPS — 1200 kW • Three-Phase • Dynamic Online up to 99%

The Vertiv™ Liebert® EXL S1 is a high-performance three-phase UPS platform that delivers secure power, premium load protection, and maximum energy savings for large-scale applications such as AI, hyperscale, colocation, hosting, and cloud environments. Optimized for maximum efficiency and power density, the EXL S1 helps reduce operating costs while maintaining availability.

In Dynamic Online mode, the EXL S1 can achieve operating efficiency of up to 99% without sacrificing availability. Its Dynamic Grid Support feature can provide frequency regulation by controlling input power to support services such as regulation-up, regulation-down, or both via battery charging and discharging. Designed with a small footprint versus similar UPS in its class, the EXL S1 is ideal when every square foot must deliver ROI—enabling customers to either redeploy saved space for revenue-generating IT equipment or reduce electrical room build size to lower construction costs.

Key Features & Benefits

• 250–1200 kW Capacity Range — Scales for large enterprise, hyperscale, colocation, and AI deployments.
• Dynamic Online Efficiency up to 99% — Reduces energy costs and heat load without compromising availability.
• Dynamic Grid Support — Enables frequency regulation-up, regulation-down, or both through battery charge/discharge control.
• High Power Density / Small Footprint — Less floor space than similar UPS in its class or kVA range for better facility ROI.
• Touchscreen Control Panel — Status-at-a-glance convenience with flexible views and multiple security options.
• Vertiv™ LIFE™ Services Ready — 24×7 remote monitoring by expert staff to improve availability and reduce labor costs.

Product Snapshot

Why Choose the Liebert® EXL S1?

• Up to 99% efficiency in Dynamic Online mode for major operating cost savings at scale.
• More usable floor space thanks to high power density and a smaller footprint than comparable UPS systems.
• Grid-interactive capability with Dynamic Grid Support to participate in frequency regulation services where applicable.
• Better operational visibility via touchscreen HMI and optional 24×7 remote monitoring with Vertiv™ LIFE™ Services.

Applications

Built for large-scale critical environments where efficiency, power density, and uptime are essential: AI infrastructure, hyperscale and enterprise data centers, colocation, hosting, and cloud facilities.