The Xtreme Power Conversion M90S-2S and the APC Symmetra LX SYA8K8RMP are modular, true online, double-conversion UPS systems designed to protect mission-critical single-phase rack-mounted loads.
While both platforms support modular architectures, the M90S-2S is an active, current-generation platform that delivers full usable power (unity power factor), higher efficiency, and a clear upgrade path within the M90S family, whereas the Symmetra LX is a discontinued legacy system with limited long-term expansion and factory support.
6–8 kVA Modular Rack-Mounted UPS Comparison
| Feature | XTREME POWER M90S-2S | APC Symmetra LX SYA8K8RMP | XPCC 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 or M90S-6S | Scalable to 8 kVA N+1 within platform | Clear growth path within M90S family |
| Rack Height | ~10.5 in (6U) | ~22.5 in (13U) | More usable kW per rack |
| Efficiency | Up to 98% (ECO) / 93% online | ~88.7% online | Lower operating cost & heat |
| Internal Runtime | Up to 9 min @ 6 kW | Up to ~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 |
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Where the M90S-2S Excels
- Replacing discontinued Symmetra LX rack systems
- Deployments requiring full usable kW output in a compact rack footprint
- Facilities prioritizing high efficiency and reduced cooling load
- Installations that need a clear upgrade path to higher-capacity modular systems
- Organizations planning future expansion with assured factory support
When APC Symmetra LX May Still Be in Use
- Existing installations with installed spare modules
- Short-term environments where no expansion is planned
- Legacy systems pending scheduled infrastructure refresh
Who Should Choose Which
Choose Xtreme Power Conversion 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
- Minimal rack footprint with maximum usable power
- A scalable upgrade path within the M90S family
- Longer standard warranty coverage
Choose APC Symmetra LX if you need:
- Temporary continuation of an existing legacy deployment
- No requirement for future expansion or factory support
Ideal Applications
- Edge data-center and IDF/MDF racks
- Healthcare and laboratory facilities
- Industrial control and automation systems
- Government and education infrastructure
- Symmetra LX replacement and modernization projects
Plan with Confidence
Request a Quote
Speak with an Xtreme Power Conversion specialist to size the right M90S-2S configuration and plan a smooth migration from legacy Symmetra LX systems.
Xtreme Power Conversion
Phone: (800) 582-4524
Email: sales@xpcc.com