Military Grade – Adjustable Output DC UPS with Lithium Polymer Battery Backup

SynQor’s Military Field-Grade Uninterruptible Power Supply units are designed for the extreme environmental and demanding electrical conditions of Military/Aerospace applications. SynQor’s UPS incorporates field proven high efficiency designs and rugged packaging technologies.

This UPS will accept a wide range of input voltage and frequency values while delivering a wide range of DC voltages to the load. The use of lithium polymer batteries permits the lowest profile and lowest weight solution in its power class. It is designed to comply with a wide range of military standards.

Two Optional Low Voltage Outputs

Options include two low voltage DC outputs, and a DC input rated for military 28 VDC sources.

Other features

  • Cold start with no AC or DC input connections
  • DC3 programmable output: 25-325 V
  • DC3 full power range: 210-325 V
  • DC3 programmable current limit: 0-6 A
  • DC3 ideal diode allows OR’ing with external sources
  • DC3 ideal diode allows HV battery charging
  • Up to 32 units can be combined to form a higher power fault-tolerant, glitch-free system, perhaps with N+M redundancy on DC3
  • User I/O and Configuration signal port

Specification Compliance

UPS-1250 units are designed to meet:

• MIL-STD-1399-300B – Interface Std for Shipboard Systems
• MIL-STD-810G – Environmental Engineering Considerations
• MIL-STD-461F – Electromagnetic Interference
• MIL-STD-704F – Aircraft Electrical Power Characteristics
• MIL-STD-1275D – Vehicle Electrical Power Characteristics


  • DC input (28 Vnom) for dual source
  • UPS-1250-M-1U >16 minutes of run-time and -40°C operation
  • UPS-1250-E-2U >24 minutes of run-time
  • Wide-range AC input frequency: 47 Hz to 800 Hz
  • DC1: Auxiliary isolated DC output (up to 500 W)
  • DC2: High power DC output (up to 1250 W) parallelable for higher power

Series Table

Model NumberPowerBattery Run-Time
@Full Power (80% Power)
Height (W x D x H)Weight
UPS-1250-S-1U (1 Standard Battery Pack)1250 W>10 min. (>13 min.)1U (17.00” x 21.60” x 1.73”)32 lbs.
UPS-1250-M-1U (1 Standard Battery Pack)1250 W>16 min. (>22 min.)1U (17.00” x 21.60” x 1.73”)33.8 lbs.
UPS-1250-E-2U (1 Extended Battery Pack)1250 W>24 min. (>31 min.)2U (17.00” x 21.60” x 3.33”)50 lbs.


AC input FreqL  47-65 HZ
W 47-800 Hz
DC3 Output270 270V Default,

25-325 Vdc

DC Input / DC2
S   Not Installed
  DC Input
M   DC2 Out 24 VDC with Droop Share
  DC2 Out 24 VDC No Share
R   DC2 Out 28 VDC with Droop Share
V   DC2 Out 28 VDC No Share
W  DC2 Out 50 VDC No Share
00  None
12  12 V
15  15 V
24  24 V
28  28 V
40  40 V
50  50 V
-E  Ethernet/SNMP with Configuration Loading
00  No CE Marking

Ask for Assistance

Selecting the right power supply for your application is not a small task. Let our technical sales engineers guide you through the process of choosing the right solution for your needs.

Below some parameters usually required to size and select the right power supply:

  • Power & control requirements
  • Output & Input Voltage / Multioutput Voltage / Variable Voltage
  • Redundancy level
  • Mounting
  • Inrush Current
  • Environmental specifications (Temperature, altitude, vibration, shock)
  • Specific Industries Standards (Railway, Military, Medical)
  • Terminals

Contact Our Team

Contact our team of experienced engineers to discuss your unique power conversion and backup needs. We offer a wide range of highly reliable components that can be integrated and customized to create a solution that meets or exceeds your requirements.

For power automation systems please contact us at

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