APC by Schneider Electric SYA8K16PXR Symmetra LX 8kVA External Online UPS Power Array
Overview
The SYA8K16PXR is APC's Symmetra LX external power array — a floor-standing, double-conversion online UPS chassis designed for data centers, enterprise server rooms, and critical infrastructure where power continuity is non-negotiable. Configured at 8,000VA (6,400W) out of the box, it scales in 4kVA increments up to 16,000VA (12,800W), giving capacity-planners a single platform that can grow with a facility rather than requiring a forklift upgrade when power demands increase. This isn't a rack-mounted unit — the SYA8K16PXR ships as a standalone floor cabinet, finished in black and silver, with dimensions reaching 59.69 inches tall and a shipping weight of 1,044 lbs, so site logistics and floor-load calculations belong on the pre-installation checklist.
Browse the full APC by Schneider Electric catalog for compatible power distribution, bypass panels, and extended battery modules that pair with this chassis.
Key Features
- Double-Conversion Online Topology: The load runs continuously on inverted power — the utility feed never directly touches connected equipment. Voltage sags, spikes, harmonics, and frequency drift are all isolated before they reach servers or network gear. For facilities with poor utility power quality, this topology eliminates the conditioning problem entirely rather than merely tolerating it.
- 8,000VA / 6,400W Base Capacity, Expandable to 16,000VA / 12,800W: Two power modules are installed, three slots remain open. Adding modules in 4kVA increments means capacity upgrades happen without downtime or a new chassis purchase — a meaningful capital planning advantage for phased build-outs in enterprise UPS deployments.
- 96% Efficiency at Full Load: High-efficiency online operation keeps heat dissipation manageable. At full load, the SYA8K16PXR dissipates 4,995 Btu/h — a real factor in data center cooling budgets. Compare this to older ferro-resonant or standby topologies that often run 85–90%, where the difference in heat load across multiple UPS units adds up quickly.
- 9 Battery Modules Installed, 4 Slots Available for Extension: The unit ships with 9 lead-acid battery modules filling most of the battery bay, with 4 slots open for additional runtime. Replacement battery part numbers are SYBT5 and SYA8K16PX798 — plan to have these on a maintenance schedule, as battery life is rated at 3–5 years depending on operating conditions.
- Typical Recharge Time of 7.5 Hours: After a full discharge event, the batteries return to operational charge in roughly 7.5 hours at 1,035W of charging power. For environments with frequent utility interruptions, this recharge window determines how quickly the system is ready for the next event — a relevant metric for facilities outside primary grid infrastructure.
- Input Power Factor 0.98, THD Below 7%: A near-unity input power factor means the SYA8K16PXR draws close to its real power demand from the utility without loading the facility's distribution system with reactive current. Input THD under 7% at full load keeps the upstream transformer and distribution panel from running hotter than necessary.
- Configurable 120/208V or 120/240V Output: Output voltage is field-selectable — either 120/208V or 120/240V — via hard-wire 4-wire (2PH+N+G) connection. This makes the unit compatible with mixed IT and facility loads that require different voltage configurations without additional distribution transformers.
- Crest Factor Up to 5:1: Handles loads with high peak-to-RMS current ratios — relevant for equipment with switching power supplies that draw short, sharp current spikes. Many cheaper online UPS units clip at 3:1 or 4:1, causing output waveform distortion under real server loads.
- Internal Bypass (Automatic and Manual) with Optional External Bypass: Automatic bypass engages if a fault condition exceeds the inverter's capacity, keeping loads energized from utility directly. Manual bypass allows maintenance without dropping the load. An external bypass option exists for facilities that require full isolation of the UPS chassis during servicing.
- Multi-Function LCD Control Panel: The front-panel LCD provides status, alarm acknowledgment, and configuration access without requiring network connectivity. Alarms are prioritized by severity and presented both audibly and visibly — useful during events when monitoring software may not be the first alert mechanism available.
- Input Frequency Auto-Sensing (45–65 Hz): Accepts utility frequencies across the 45–65 Hz range automatically, making this unit deployable in international data center environments or facilities with generator sources that may drift off nominal 60 Hz during transient loading.
Integration and Compatibility
The SYA8K16PXR integrates into the Symmetra LX modular UPS ecosystem. Hard-wire input connection (4-wire, 2PH+N+G) requires coordination with a licensed electrician for installation — this is not a plug-in appliance. A compatible bypass switch or maintenance bypass panel from the Symmetra LX accessory line is strongly recommended for any environment where the UPS must be serviced without dropping connected loads. Operating altitude is rated to 10,000 ft; facilities above this elevation should consult the manufacturer's derating tables before commissioning. The unit operates between 0–95% relative humidity (non-condensing implied) across its full range. Acoustic output is rated at 62 dBA — audible in a quiet server room, standard for a floor-standing UPS of this capacity class. Pairing this chassis with a managed PoE network switch and a network management card (sold separately) enables remote monitoring, load shedding configuration, and graceful server shutdown integration.
Frequently Asked Questions
Q: What is the base and maximum power capacity of the SYA8K16PXR?
A: The SYA8K16PXR ships configured at 8,000VA (6,400W). It is expandable in 4kVA increments up to a maximum of 16,000VA (12,800W) by adding power modules to the three open module slots.
Q: How many battery modules come installed, and what are the replacement part numbers?
A: The unit ships with 9 lead-acid battery modules installed, with 4 additional battery slots available. Replacement battery part numbers are SYBT5 and SYA8K16PX798. Battery life is rated at 3–5 years depending on operating temperature and discharge frequency.
Q: Is the SYA8K16PXR rack-mountable?
A: No. The SYA8K16PXR is a floor-standing external power array cabinet — it is not rack-mountable and is not two-post mountable. It stands 59.69 inches tall and weighs 1,044 lbs, requiring floor load planning and sufficient clearance for front-panel access.
Q: What output voltage configurations does the SYA8K16PXR support?
A: The output is field-configurable for either 120/208V or 120/240V via a hard-wire 4-wire (2PH+N+G) connection. Output frequency syncs to mains between 47–63 Hz, or runs at 60 Hz ±0.1% when not synced to mains.
Q: What is the UPS topology and what does that mean for connected equipment?
A: The SYA8K16PXR uses a double-conversion online topology. Connected equipment runs continuously on conditioned, inverted power — the utility input never directly powers the load. This eliminates sags, surges, harmonics, and frequency variations before they reach servers or critical infrastructure.
Q: What bypass options are available for maintenance?
A: The unit includes both automatic and manual internal bypass. Automatic bypass activates if the inverter cannot handle the load; manual bypass is operator-initiated for maintenance. An optional external bypass panel is also available for facilities requiring full chassis isolation during service.
The SYA8K16PXR is the external battery and power array chassis for the Symmetra LX ecosystem — it is not a standalone UPS and should not be quoted as one. It pairs with a Symmetra LX UPS head-end unit and extends both runtime and capacity. What makes this chassis worth specifying is the scalability headroom: you commission it at 8kVA with 2 power modules and 9 battery modules, and you have 3 open power slots and 4 open battery slots to grow into without replacing the cabinet. That's a legitimate infrastructure investment, not a one-time purchase.
Technical Highlights:
- Double-Conversion Online at 96% Efficiency: Full online conversion with 4,995 Btu/h heat dissipation at rated load — lower than comparable 8kVA units running at 90–92%, which meaningfully reduces CRAC unit load in high-density rows.
- Expandable to 16,000VA / 12,800W: Three empty power module slots and four battery slots give this chassis a second life as load grows. In phased build-outs, that avoids a second capital purchase and a second outage window for replacement.
- Input Power Factor 0.98 with Sub-7% THD: Draws close to pure real power from the distribution system. In facilities where the upstream transformer is already running warm, this matters — high-THD UPS units accelerate transformer aging and create neutral current problems in 3-phase panels.
Deployment Considerations:
- At 1,044 lbs, floor-load verification is mandatory before placement — most raised-floor data centers can handle it, but verify with a structural engineer if the unit is going on a non-data-center slab or mezzanine. Front-mounting access requires unobstructed clearance per APC's installation specs.
- The 7.5-hour recharge time at 1,035W means sequential discharge events within a single shift can leave the system partially charged for the second event. If the facility has a generator, confirm transfer time and generator stability so the SYA8K16PXR only needs to bridge the gap — not carry the full outage load solo.
This chassis is the right specification for a phased enterprise data center build where the initial load is 6–8kW but a credible 3-year plan puts it at 10–12kW. Commission it now, add modules as load grows, and avoid a costly forklift replacement. If the load is already known to exceed 12.8kW at commissioning, size to a larger Symmetra platform from the start.
