M90S-6S vs APC Symmetra LX SYA16K16P
The APC Symmetra LX SYA16K16P is discontinued (Schneider lists it end-of-sale as of 2025), so most evaluations are replacement decisions. The SYA16K16P is the tower model, so this is a tower-to-tower comparison; for rack-mount, see the M90S-6S vs SYA16K16RMP page. The Xtreme Power M90S-6S is an active, current-generation modular online UPS that delivers more usable watts at unity power factor, higher efficiency, longer internal runtime, universal module slots, and a longer warranty, while preserving the modular architecture Symmetra LX users rely on.
What the M90S-6S brings
- Active production vs a discontinued legacy platform
- About 40% more usable watt output (18 kW unity PF vs 12.8 kW at 0.8 PF)
- Higher efficiency (93% online vs about 88.7%), lower energy and cooling cost
- Universal module slots (power or battery) for simpler expansion and sparing
- Longer internal runtime and a longer standard warranty
Side-by-side specifications
| Specification | Xtreme Power M90S-6S | APC Symmetra LX (SYA16K16P) | Advantage / consideration |
|---|---|---|---|
| Product status | Active production | Discontinued (2025) | M90S – long-term availability |
| Form factor | Tower (rack via M90S-RMK kit) | Tower (SYA16K16P) | Tower-to-tower comparison; see the SYA16K16RMP page for rack-mount |
| Capacity | 18 kVA / 18 kW (unity PF) | 16 kVA / 12.8 kW (0.8 PF) | M90S – about 40% more usable watts |
| Topology | Online double conversion | Online double conversion | Equivalent protection |
| Modularity / scalability | 6–24 kVA in 6 kVA steps (to 18 kVA N+1) | 4–16 kVA N+1 in 4 kVA steps | M90S – higher maximum capacity |
| Efficiency | Up to 98% (ECO) / 93% online | about 88.7% online | M90S – lower energy and heat |
| Internal runtime | Up to 9 min @ 18 kW | Up to 6 min @ 12.8 kW | M90S – longer internal runtime |
| Maintenance bypass | Standard | Standard | Equivalent serviceability |
| Module slot flexibility | Universal slots (power or battery) | Dedicated power & battery slots | M90S – simpler expansion and sparing |
| Display | 5.7 in color LCD + module-level LCDs | Chassis-level LCD only | M90S – improved diagnostics |
| Warranty | 3-year repair or replace | 2-year repair or replace | M90S – longer coverage |
Specifications based on publicly available manufacturer documentation; confirm against current vendor data. Schneider Electric lists the Symmetra LX SYA16K16P as discontinued (2025), with continued service support for existing units; the M90S-6S is an active, current-generation replacement.
Choosing between them
The Symmetra LX SYA16K16P is discontinued, so this is primarily a replacement decision. The M90S-6S is an active platform with more usable watts at unity power factor, higher efficiency, longer runtime, universal module slots, and a longer warranty. The Symmetra LX may remain in service short-term where spares are stocked and no expansion is planned.
Choose the M90S-6S if you need
- An active, long-term supported modular UPS platform
- More usable watts (unity PF) from the same footprint
- Higher efficiency to cut energy and cooling cost
- Universal module slots for simpler expansion and sparing
- A longer warranty
The APC Symmetra LX may still serve if you have
- An existing installation with spare modules on hand
- A short-term need with no planned expansion
- A legacy environment awaiting a scheduled refresh
Frequently asked questions
No. Schneider Electric lists the Symmetra LX SYA16K16P as discontinued (end-of-sale in 2025), with service support continuing for installed units for a defined period. New deployments should evaluate a current platform such as the M90S-6S.
Yes. The M90S-6S is designed as a modernization path for Symmetra LX installations, preserving the modular, hot-swappable architecture while adding unity power factor, higher efficiency, universal module slots, and a longer warranty. This page compares tower form factors; for a rack-mount Symmetra, see the M90S-6S vs SYA16K16RMP comparison.
About 40% more usable watts: 18 kW at unity power factor versus 12.8 kW on the Symmetra LX SYA16K16P (16 kVA at 0.8 PF). The M90S also scales higher within one platform.
Yes. The M90S-6S runs up to about 93% in online double-conversion mode (up to 98% in ECO) versus roughly 88.7% online for the Symmetra LX, which lowers energy use and cooling load.
Related comparisons
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