24kVA Modular UPS 200V Double Conversion Online

M90S-6S 24kVA Modular UPS

The M90S-6S 24kVA Modular UPS is a flexible solution that combines continuous power availability and the highest efficiency for mission critical applications.

  • The Double Conversion Online technology, protects attached critical equipment by providing stabilization and power conditioning to incoming electrical power.
  • Modular & Redundant power and battery modules for required High Availability power applications.
  • Dual inverter design which provides selectable output voltages of 208/120V, 240/120V,230/115V, or 200/100V without the need for transformers.
  • Future proof expansions, connect up to FIFTEEN battery modules for increased backup run-times now or in the future.
  • ON-SITE setup, support and preventative maintenance contracts available.
  • Purchase with confidence!  The M90S-6S 24kVA UPS is backed by an industry leading 3-year product warranty and a $50,000 Load Protection Policy.
  • For product configuration support and quotations please contact us via Chat, Phone or email at sales@republicpowersystems.com  
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Product description

Features of the M90S-6S 24kVA UPS include:

The M90S-6S 24kVA Modular UPS is a scalable, flexible power solution.  The UPS system combines continuous power availability and the highest efficiency for mission critical applications.

M90S-6S provides unity power factor output (kVA = kW) providing maximum usable power and avoids any need to oversize the UPS. Maintenance bypass and output
distribution within the UPS frame eliminates the need for external component connections, reducing installation costs.

  • POWER CAPACITY: 24kVA / 24000 VA / 24000 Watt capacity                        CLICK HERE TO CALCULATE YOUR BACKUP POWER REQUIREMENTS 
  • INPUT VOLTAGE: 120/208V or 120/240V & 50/60Hz auto-sensing (2PH+N+G)
  • RUN TIMES: 2.5 min. @ 100% full load, (UPS + 2 Battery Modules)
  • SCALABLE RUNTIME: Support for up to FIFTEEN battery packs for extended runtimes up to 46 min. @ 100% full load
  • OUTPUT VOLTAGE: 120/208V or 120/240V & 50/60Hz ± 0.1Hz; (2PH+N)
  • UPS TOPOLOGY: Double Conversion Online
  • EFFICIENCY: Up to 98% ECO mode, 93% online mode
  • COMMUNICATIONS INTERFACE: RS-232, USB, EPO, intelligent slot for optional cards (Web/SNMP, Relay, Modbus)
  • WARRANTY: 3 years electronics, 3 years battery warranty, optional 5 year warranty available (USA and Canada)
  • SUPPORT: ON-SITE setup, support and preventative maintenance contracts available
  • OPTIONS: Receptacle panels (2 max), extended battery cabinet, 5 year extended warranty

Benefits of the M90S-6S UPS include:

Reduce power consumption and increase end to end efficiency with this powerful, redundant and scalable UPS.  Designed for high density critical loads, the M90S-6S delivers industry leading reliability, efficiency and flexibility. Output voltage and frequency are programmable to meet a wide range of US and international requirements.

REDUNDANCY The M90S-6S’ redundant architecture allows fail over power modules and hot swappable batteries for increased power protection6kva Modular UPS, 12kva modular UPS, 18kva Modular UPS, 24kva modular UPS

HIGHLY CONFIGURABLE Hardwired input and output with terminal block connections or optional input cord and output receptacles

LARGE LCD DISPLAY 5.7” display provides graphic display including status and alarms

POWER MODULE LCD Each power module includes LCD display, providing module detailed information and redundancy

LONGER RUN TIMES Modular battery packs are available for extended battery runtimes

DUAL VOLTAGE OUTPUT 240/120V or 208/120V supports mixed voltage loads and receptacle types

HOT SWAPPABLE COMPONENTS The M90S-6S includes integrated wrap around maintenance bypass.  This allows UPS electronics and replacement of the batteries to be serviced or replaced without interruption to critical load

NETWORK MANAGEABLE The M90S-6S can be managed over a network for monitoring battery performance and life, and overall system operation and performance.

REDUCE ENERGY COST Best-in-class energy efficiency provides lowest energy consumption and heat output

$50,000 LOAD PROTECTION POLICY Offers protection against damaged connected equipment

Power Protection offered by the M90S-6S UPS:

  • Overload conditions such as electrical surges and sags
  • Total loss of electrical power or hard power “re-boots”
  • Unstable incoming power caused from outdated or faulty electrical wiring and or power distribution equipment
  • Harmonic interference from neighboring “high power draw” equipment
  • Severe weather events such as lighting storms, ice and snow storms and downed power lines
  • Unstable power generation from local utilities or on-site generation

Click here to learn more about the TOP 10 POWER ISSUES and UPS power protection features

Wide Power Input

The M90S-6S 24000VA Modular UPS supports incoming wide AC power input. The automatic voltage regulator (AVR), protects the UPS and connected equipment from adverse voltage conditions. This wide AC input capability can offer sag and surge protection without engaging the backup batteries of the UPS. This will reduce the stress on connected critical equipment and extends the battery life of the UPS.

Double Conversion Topology

Double Conversion Technology

                           Double Conversion Technology

The M90S-6S 24kVA Modular UPS is a high density double conversion uninterruptible power supply.  Incoming AC utility power is fed to the UPS’ rectifier converting it from AC to DC power. The converted DC power routes to a battery charging circuit and to the inverter for conversion back to AC power. The resulting “double converted” electrical power is pure sine wave output providing near perfect electrical power for connected equipment.

To ensure 7/24 up time the double conversion UPS topology utilizes a static “automatic internal bypass switch” within its circuity design. If the M90S-6S 24kVA UPS detects a system failure, audible alarms will sound as the bypass switch is engages. This routes power around the failed UPS and ensures critical load power to target equipment.  This very important feature allows for 100% up time for critical equipment during repair or module replacement.

In the event of total power failure, the UPS will power off the rectifier when the loss of power is  detected. The UPS’ internal backup batteries will continue to supply DC power to the inverter. There is no transfer time as the transition to battery power is instantaneous. This feature provides true uninterruptible power to mission critical equipment.

Technical Specifications



Rated Power Capacity (Apparent/Active)


Voltage/frequency nominal

120/208V or 120/240V & 50/60Hz auto-sensing (2PH+N+G)

Voltage/frequency range

152-269VAC* (L-L) / 40–70Hz


120/208V or 120/240V & 50/60Hz ± 0.1Hz; (2PH+N)

Efficiency (Maximum%)

98% ECO mode, ≥ 93% online mode

THD (full load)

< 2%

Overload Capacity

> 150% for 200ms
100% – 110% for 30 min
110% – 130% for 5min
130% – 150% for 10s

Nominal voltage


Max charging (adjustable)


Battery Module

16.3”W x 24”D x 5.2”H / 107 lbs

Dimensions & Weight

17.4”W x 33.7”D x 45.5”H (UPS & BC7) // UPS=180lbs / BC7=162lbs

Maximum Capacity


Enclosure Capacity

6 Slots including 4 universal slots + 2 battery only slots

Optional Battery Enclosure

7 Slots for additional battery modules

Output Connections

Terminal blocks and/or up to 2 receptacle panels

Operating Temperature

0–40°C (32–104°F)**

Operating Elevation

5,200 ft above sea level**

Acoustic Noise

< 58dBA at 1m


UL-1778 (TUV)


RS-232, USB, EPO, intelligent slot for optional cards (Web/SNMP, Relay/dry contact, Modbus)


3 years battery warranty (USA and Canada)
3 years electronics

Whats in the box

Anchor brackets
RS-232 Communication Cable
USB cable
User Manual x1
ViewPower Software

Available Options

2-post Shelf Kit
4-post Rail Kit
5 year extended warranty
Extended Battery Cabinet
output distribution
Receptacle Panels (4 max)

Estimated Run-Time

Battery Run Time Graph