Standby simulated sine wave desktop/floor/wall mount UPSs 

The Minuteman Enspire Series UPS offers standby protection and a compact desktop/floor/wall mount profile perfect for a range of small to medium load applications.


  • Desktop PCs
  • Workstations
  • Home Entertainment
  • Routers & Modems
  • Gaming Consoles
  • Small Security Systems

(Not for sale in CO, VT, or WA)

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Download Product User Manual (EN350 & EN550) | Download Product User Manual (EN750LCD & EN900LCD)

Low-profile, High protection

The Minuteman Enspire Series UPS is a low-cost, high performance UPS line that provides the features needed to protect your valuable equipment. The EN350 and EN550 units each have eight outlets, four provide battery support along with spike and surge protection and four with spike and surge protection only.

The EN750LCD and EN900LCD each have five of the outlets described above for total protection of up to ten connected devices. In addition, all units have outlets which are specifically spaced to support transformer blocks.


Complete Protection for:

  • Desktop Computers
  • Standalone Servers
  • Network Switches, Hubs, and Peripherals
  • VoIP Communications
  • Telephone Systems
  • External Computer Accessories
  • Security Cameras and DVRs

Enspire® Key Product Features

  • Economical Standby Protection Hardware
    Cost-effective surge and backup protection for small loads
  • Versatile Connection Options
    8 (350 and 550) or 10 (750 and 900) outlets to ensure a connection for all of your devices
  • Compact, Wall-Mountable Case
  • Tool-less, Hot-Swappable Battery Replacement
  • USB Communications (HID Compliant)
    Enspire UPS USB connections are automatically recognized by Microsoft Windows (550/750/900 models)
  • Single Line Phone / Fax / Network Protection
    The Enspire UPS provides a low cost means of protecting telephone/fax/network lines
  • Independent Battery Bypass
    Provides surge and spike protection, even when batteries are weak or dead


Features on 750VA and 900VA Models:

  • Easy to Read LCD Display
    Real-time updates on system and power status, estimated runtime remaining based on attached load
  • Green Mode
    Lower power consumption mode during off-time
  • Coax Protection
    Protect coaxial cable for AV equipment from damaging spikes and surges
  • Industry Leading Product Protection
    Standard 3-year parts and labor warranty with 2-year non-prorated battery coverage; $50,000 Platinum Protection Plan (US and Canada)
  • ECO Mode on EN900LCD

Other Features

Protects Against Spikes, Surges, Brownouts and Blackouts Feature-rich Design

  • RJ11/45 Network/Phone/Fax protection
  • RoHS 2 compliant
  • Transformer-friendly receptacles
  • DC Startup capability
  • Independent Battery Bypass
  • Built-in self-diagnostics testing
  • Audio & Visual alarms

WARNING: This product can expose you to chemicals, including lead and lead compounds, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to: www.P65warnings.ca.gov/product


Get ultimate control over your power with SentryHD

In today’s complex world of data, networks, and software, control and management of applications is vital, especially when it comes to the power that is supplied to these devices.

SentryHD, included free with all current Minuteman UPS systems, is the latest update to Minuteman’s popular Sentry monitoring and management software. This powerful tool provides users and network managers a range of monitoring & managment tools for their power, allowing total control before, during, and after power problems.

With a simple connection to the UPS via USB or RS-232, SentryHD provides the capability to configure UPSs, monitor power, and diagnose issues, all from secure connections on the network. This eliminates wasteful runs around the facility, saving time and money.


5 Full Years of Trouble-free Service – Guaranteed

Minuteman UPSs already ship with the best warranty in the business at 3 years, including non-prorated battery coverage on most products.

Two levels of Extended Warranty Plans are also available on most UPS product lines to provide an additional 2 years of coverage. These plans ensure a full 5 years of trouble-free ownership.

For complete product information, brochures, and manuals visit our Media Resources Center.


Out of StockOut of StockLimited Stock AvailableOut of Stock
VA Rating350VA550VA750VA900VA
Load Capacity (Watts)250W300W450W500W

Installation Format(s)Desktop, Floor, or Wall-mount

Nominal Voltage Range95 - 140VAC
Frequency Range60HZ ±6Hz
Input Surge ProtectionCircuit Breaker
Surge Joule Rating1000J

Input Plug Type (Cord Length)NEMA 5-15P (5 ft.) NEMA 5-15P (5 ft.)
Maximum Input Current10 Amps (350VA & 550VA)12 Amps (750VA & 900VA)

Output Voltage Range (Battery Mode)95 - 140VAC (120VAC ±5% until low battery warning)
Output Frequency Range (Battery Mode)60Hz ±6Hz (60Hz ±0.5Hz unless synchronized to line)
Output Waveform (Battery Mode)Sine wave (Step Wave)

Output Receptacles(4) Surge-only / (4) Battery & Surge(5) Surge-only / (5) Battery & Surge

Tool-less ReplacementYes
Ind. Battery BypassYes
DC StartupYes
Hot-swappable BatteriesYes

Runtime (Full/Half Load)3 min. / 11 min.2 min. / 10 min.4 min. / 12 min.3 min. / 11 min.