M90S-2S vs APC Symmetra LX SYA8K8RMP
The Xtreme Power M90S-2S and the APC Symmetra LX SYA8K8RMP are modular online double-conversion UPS for single-phase rack-mounted loads. The M90S-2S is an active, current-generation platform delivering full usable power (unity power factor), higher efficiency, and a clear upgrade path within the M90S family, while the Symmetra LX is a discontinued legacy system with limited long-term expansion and factory support.
Why the M90S-2S replaces the Symmetra LX
- Full usable kW — unity power factor (6 kW) vs the Symmetra LX’s 0.8 PF (6.4 kW from 8 kVA).
- Up to 98% ECO / 93% online efficiency vs about 88.7% — lower operating cost and cooling load.
- Compact 6U chassis vs about 13U — more usable kW per rack.
- Active platform with an upgrade path to M90S-4S / 6S and a longer 3-year warranty.
6–8 kVA modular UPS, side by side
| Specification | Xtreme Power M90S-2S | APC Symmetra LX SYA8K8RMP | Advantage |
|---|---|---|---|
| Product status | Active production | Discontinued | Long-term platform availability |
| Capacity | 6 kVA / 6 kW (unity PF) | 8 kVA / 6.4 kW (0.8 PF) | Full usable kW at rated capacity |
| Topology | Online double-conversion | Online double-conversion | Equivalent protection |
| Modularity / scalability | 2-slot modular chassis; upgrade path to M90S-4S / 6S | Scalable to 8 kVA N+1 within platform | Clear growth path in the M90S family |
| Rack height | About 10.5 in (6U) | About 22.5 in (13U) | More usable kW per rack |
| Efficiency | Up to 98% ECO / 93% online | About 88.7% online | Lower operating cost and heat |
| Internal runtime | Up to 9 min @ 6 kW | Up to about 6 min @ 6.4 kW | Longer runtime at rated load |
| Maintenance bypass | Standard | Standard | Equivalent serviceability |
| Warranty | 3-year repair or replace | 2-year repair or replace | Longer standard warranty |
Capacity figures show usable watts: the M90S delivers unity power factor (kVA = kW), while the Symmetra LX is rated 0.8 PF, so its kVA rating overstates usable watts. The Symmetra LX is a discontinued platform; efficiency and runtime figures reflect typical configurations from manufacturer documentation.
Choosing between them
Both are modular online double-conversion UPS for single-phase rack loads, so the decision is mainly between an active, expandable platform and continuing a legacy install. Choose the M90S for full usable kW, higher efficiency, universal module slots, and assured factory support; the Symmetra LX generally only makes sense where an existing deployment is being maintained short-term.
Choose the M90S-2S if you need
- An active, long-term supported modular UPS platform
- Unity power factor output with no stranded kVA
- Higher efficiency to lower operating cost
- A compact rack footprint with maximum usable power
- A scalable upgrade path within the M90S family
- Longer standard warranty coverage
The Symmetra LX SYA8K8RMP may fit if you need
- Temporary continuation of an existing legacy deployment
- No requirement for future expansion or factory support
Related comparisons
Replacing a Symmetra LX or planning modular UPS?
Xtreme Power supports modular UPS sizing, N+1 redundancy planning, and smooth migration from legacy Symmetra LX systems across enterprise, healthcare, industrial, and public-sector infrastructure.