M90S-4S vs APC Symmetra LX SYA12K16P
The APC Symmetra LX SYA12K16P is discontinued, so most evaluations are replacement decisions. The SYA12K16P is the tower model, so this is a tower-to-tower comparison; for rack-mount, see the M90S-4S vs SYA12K16RMP page. The Xtreme Power M90S-4S is an active, current-generation modular online UPS delivering more usable watts at unity power factor, higher efficiency, and longer runtime, while preserving the hot-swappable modular architecture Symmetra LX users rely on.
What the M90S-4S brings
- Active production vs a discontinued legacy platform
- About 25% more usable watts (12 kW unity PF vs 9.6 kW at 0.8 PF)
- Higher efficiency (93% online vs about 88.7%)
- Longer internal runtime
- Longer standard warranty (3 years vs 2)
Side-by-side specifications
| Specification | Xtreme Power M90S-4S | APC Symmetra LX (SYA12K16P) | Advantage / consideration |
|---|---|---|---|
| Product status | Active production | Discontinued (2025) | M90S – long-term availability |
| Form factor | Tower (rack via M90S-RMK kit) | Tower (SYA12K16P) | Tower-to-tower comparison; see the SYA12K16RMP page for rack-mount |
| Capacity | 12 kVA / 12 kW (unity PF) | 12 kVA / 9.6 kW (0.8 PF) | M90S – about 25% more usable watts |
| Topology | Online double conversion | Online double conversion | Equivalent protection |
| Modularity / scalability | 4-slot modular chassis (power or battery) | Scalable to 16 kVA N+1 (4 kVA steps) | Symmetra scales to 16 kVA; M90S slots are universal |
| Efficiency | Up to 98% (ECO) / 93% online | about 88.7% online | M90S – lower energy and heat |
| Internal runtime | Up to 9 min @ 12 kW | Up to 6 min @ 9.6 kW | M90S – longer internal runtime |
| Maintenance bypass | Standard | Standard | Equivalent serviceability |
| 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 as discontinued (2025). Note the Symmetra LX SYA12K16P scales to 16 kVA N+1, above the M90S-4S 12 kVA chassis maximum; for higher capacity use an M90S-6S. The M90S-4S leads on usable watts, efficiency, runtime, and warranty at the 12 kVA class.
Choosing between them
The Symmetra LX SYA12K16P is discontinued, so this is primarily a replacement decision at the 12 kVA class. The M90S-4S delivers more usable watts at unity power factor, higher efficiency, longer runtime, and a longer warranty. Note the Symmetra LX scales higher (to 16 kVA); for that ceiling, step up to the M90S-6S.
Choose the M90S-4S if you need
- An active, long-term supported modular UPS platform
- More usable watts (unity PF) in the same 12 kVA class
- Higher efficiency to reduce operating and cooling cost
- Universal power and battery module slots
- A longer warranty
The APC Symmetra LX may still serve if you have
- An existing deployment with spare modules installed
- A short-term need with no planned expansion
- A requirement to scale to 16 kVA in the legacy frame (or step up to the M90S-6S)
Frequently asked questions
No. Schneider Electric lists the Symmetra LX as discontinued (end-of-sale in 2025), with service support continuing for installed units. New deployments should evaluate a current platform such as the M90S-4S.
Yes. The M90S-4S is designed as a modernization path for Symmetra LX, preserving the hot-swappable modular architecture while adding unity power factor, higher efficiency, and a longer warranty. This page compares tower form factors; for a rack-mount Symmetra, see the M90S-4S vs SYA12K16RMP comparison. If you need to scale beyond 12 kVA, use the M90S-6S.
About 25% more usable watts: 12 kW at unity power factor versus 9.6 kW on the Symmetra LX SYA12K16P (12 kVA at 0.8 PF).
Yes, in its own frame: the SYA12K16P scales to 16 kVA N+1, above the M90S-4S 12 kVA chassis maximum. For a higher ceiling on the Xtreme side, the M90S-6S scales to 18 kVA and beyond.
Related comparisons
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