APC by Schneider Electric SY500K500D Symmetra PX 500kW Scalable Tower UPS

Overview

The SY500K500D is APC's Symmetra PX 500kW scalable three-phase UPS — a tower-form-factor power protection platform built for large data centers, enterprise server rooms, and industrial facilities where a single unplanned outage can translate directly into significant operational and financial loss. At 500kVA / 500kW with a unity power factor, this system delivers full kilowatt output without the derating penalty common on older double-conversion designs. If you're specifying large-format UPS systems for a mission-critical load and need a platform that can absorb future capacity growth without a forklift upgrade, the SY500K500D belongs in the conversation.

This configuration ships without an integrated maintenance bypass or internal distribution — a deliberate design choice for facilities that already have external bypass switching and a dedicated downstream distribution panel. That distinction matters: don't select this SKU if you need an all-in-one cabinet; do select it when your electrical infrastructure team has those components handled externally and you want to avoid paying for redundant switchgear inside the UPS frame.

Key Features

• 500kW at Unity Power Factor: Full 500kW real power output at 1.0 power factor means no gap between the kVA nameplate and the kilowatts your load actually draws. On older 0.8 PF designs, a nominally 500kVA unit only delivers 400kW — here you get the full nameplate, which simplifies capacity planning and often allows a smaller (less expensive) frame to cover the same IT load.
• 96% Operating Efficiency: At 96% efficiency across the load range, the SY500K500D sheds significantly less energy as heat compared to earlier-generation double-conversion UPS designs that typically ran 92–94%. On a 500kW load running 8,760 hours per year, that 2–4 percentage point improvement translates to tens of thousands of dollars in annual power savings and a meaningfully smaller cooling load in the same room.
• Hot-Swap VRLA Battery Modules: Sealed lead-acid (VRLA) battery modules are field-replaceable under load — no scheduled downtime required for battery maintenance. Battery recharge time is rated at 3.5 hours, so after a discharge event, the system returns to full runtime protection within a half-shift. This is the spec that matters most in facilities running continuous 24/7 operations.
• Scalable Architecture: The