When updating critical power infrastructure, finding a reliable APC Symmetra LX replacement is essential for maintaining uptime, protecting equipment, and ensuring long-term serviceability. The APC Symmetra LX UPS is already end-of-life (EOL), and many organizations are now actively replacing LX 4000, LX 8000, LX 12000, LX 16000, and rack-mount (RM) Symmetra LX systems that are no longer supported or cost-effective to maintain.
Xtreme Power’s M90S modular UPS is a proven upgrade path for legacy Symmetra LX installations, delivering greater scalability, unity power factor, hot-swappable modules, and lower installation costs compared to traditional monolithic UPS designs. Built to replace Symmetra LX systems from 4kVA to 16kVA while providing a clear growth path up to 48kVA, the M90S allows IT managers and facility teams to modernize power protection without migrating to three-phase power or proprietary battery frames.
Whether planning a direct one-for-one replacement or deploying a scalable platform for future expansion, this guide highlights the best-performing Symmetra LX alternatives, supported by detailed cross-reference charts and professional UPS migration services to help you transition confidently from legacy APC hardware to next-generation modular power protection.
The official Schneider Electric product page for APC Symmetra LX 16kVA is here:
https://www.se.com/us/en/product/SYA16K16PXR/apc-symmetra-lx-16kva-scalable-to-16kva-n+1-ext-run-tower-208-240v/
Xtreme Power’s M90S modular UPS is a modern, scalable alternative designed specifically for Symmetra LX migrations. With hot-swappable modules, rack or tower deployment, and a unity power factor for maximum usable power, the M90S delivers a clean upgrade path without forcing a switch to three-phase power.
Learn more about unity power factor here:
https://xpcc.com/unity-power-factor-ups/
Replace APC Symmetra LX 4000, 8000, 12000 & 16000
Many Symmetra LX systems are referenced by numeric capacity rather than APC part number. The M90S directly replaces the following commonly searched systems:
- Symmetra LX 4000 (4kVA) replacement UPS
- Symmetra LX 8000 (8kVA) replacement UPS
- Symmetra LX 12000 (12kVA) replacement UPS
- Symmetra LX 16000 (16kVA) replacement UPS
Unlike the original Symmetra LX, the M90S scales well beyond initial capacity, supporting 6kVA to 48kVA within a single modular platform.
Symmetra LX RM (Rack Mount) Replacement UPS
If you are searching for a Symmetra LX RM replacement, the M90S supports rack-mount configurations using optional Xtreme Power rack-mount kits. This makes it a direct replacement for discontinued Symmetra LX RM and RMP models.
Rack-mount advantages include:
- High power density for IT rooms and edge sites
- Integrated maintenance bypass for simplified service
- Clean migration from legacy Symmetra LX RM systems
Rack-mount configurations require the Xtreme Power M90S rack-mount kit.
Overview – Xtreme Power M90S Modular UPS
The Xtreme Power M90S is a modular, single-phase UPS platform designed for continuous availability and simplified maintenance. M90S configurations cover a broad range of applications from edge computing to containerized data centers with flexible power scaling.
View product pages:
- M90S-2S – https://xpcc.com/products/m90s-2s/
- M90S-4S – https://xpcc.com/products/m90s-4s/
- M90S-6S – https://xpcc.com/products/m90s-6s/
- M90S-12S – https://xpcc.com/products/m90s-12s/
Typical applications include edge computing, IT closets, broadcast facilities, and large residential projects where three-phase power is not available.
Key Features & Benefits
- Unity Power Factor (kVA = kW) – Full utilization of UPS capacity with no oversizing
- Modular & Scalable Architecture – Grow from 6kVA to 48kVA without replacing the UPS
- Hot-Swappable Power & Battery Modules – Service and expand without downtime
- Flexible Split-Phase Design – Supports 208/120V or 240/120V (2P, N, G)
- Integral Maintenance Bypass – Built-in bypass eliminates external bypass cabinets
Models & Capacities
M90S-2S (2-Slot)
208/120V or 240/120V single-phase, 6kVA
Rack-mount enclosure with rear-facing maintenance bypass
Optional line cords and output receptacle panels
M90S-4S (4-Slot)
208/120V or 240/120V single-phase, 6kVA–12kVA
Tower enclosure with front-facing maintenance bypass
Optional rack-mount kit
M90S-6S (6-Slot)
208/120V or 240/120V single-phase, 6kVA–24kVA
Tower enclosure with front-facing maintenance bypass
Optional rack-mount kit
M90S-12S (12-Slot)
208/120V or 240/120V single-phase, 6kVA–48kVA
Front-access cabinet with large touch LCD
Ideal for edge and containerized data center deployments
Why Replace Symmetra LX with M90S?
Compared to discontinued Symmetra LX systems, the M90S provides:
- Higher usable power through unity power factor
- Greater scalability without proprietary battery frames
- Lower installation cost with integrated bypass
- A modern, supported platform designed for long-term availability
This makes the M90S a clear upgrade path for Symmetra LX users seeking reliability, flexibility, and lower lifecycle cost.
Symmetra LX to M90S Cross-Reference Chart
| Discontinued APC Symmetra LX Model | Symmetra Rating | Description | Suggested Xtreme M90S Replacement | Notes |
| SYA2K6RMT-P1 | 2kVA/1.6kW | 2kVA scalable to 6kVA | M90S-2S6K | 6kW rated; for N+1 use M90S-4S12K |
| SYA4K8P | 4kVA/3.2kW | 4kVA scalable to 8kVA Tower | M90S-2S6KT | 6kW rated; for N+1 use M90S-4S12K |
| SYA4K8RMP | 4kVA/3.2kW | 4kVA scalable to 8kVA Rackmount | M90S-2S6K | 6kW rated; for N+1 use M90S-4S12K |
| SYA8K8P | 8kVA/6.4kW | 8kVA scalable to 8kVA Tower | M90S-2S6KT | 6kW rated; for N+1 use M90S-4S12K |
| SYA8K8RMP | 8kVA/6.4kW | 8kVA scalable to 8kVA Rackmount | M90S-2S6K | 6kW rated; for N+1 use M90S-4S12K |
| SYA12K16P | 12kVA/9.6kW | 12kVA scalable to 16kVA Tower | M90S-6S (6-Slot) | 12kW rated; scalable to N+1 or 24kW |
| SYA12K16RMP | 12kVA/9.8kW | 12kVA scalable to 16kVA Rackmount | M90S-6S (6-Slot) | 12kW rated; scalable to N+1 or 24kW |
| SYA16K16P | 16kVA/12.6kW | 16kVA scalable to 16kVA Tower | M90S-6S (6-Slot) | 12kW rated; scalable to N+1 or 24kW |
| SYA16K16RMP | 16kVA/12.6kW | 16kVA scalable to 16kVA Rackmount | M90S-6S (6-Slot) | 12kW rated; scalable to N+1 or 24kW |
Download full comparison PDF:
https://xpcc.com/wp-content/uploads/Xtreme-M90S-APC-Symmetra-LX-Comparison.pdf
Frequently Asked Questions
Q. What replaces the APC Symmetra LX 8000 or 12000?
A. The Xtreme Power M90S replaces Symmetra LX systems from 4kVA to 16kVA and scales up to 48kVA with modular expansion.
Q. Is there a rack-mount replacement for Symmetra LX RM models?
A. Yes. The M90S supports rack-mount deployment using optional rack-mount kits, making it a direct replacement for Symmetra LX RM systems.
Q. Is the APC Symmetra LX discontinued?
A. Yes. The Symmetra LX platform has reached end of life, and replacement parts and battery systems are increasingly difficult to source.
Talk to a Power Specialist
Ready to replace your APC Symmetra LX system? Upgrade to the Xtreme Power M90S modular UPS for scalable capacity, hot-swappable modules, and lower installation costs.
Contact sales@xpcc.com or call 1-800-582-4524 to request a quote or schedule a consultation.