Tripp Lite
1111 W. 35th Street
Chicago, IL 60609
1 773.869.1774
1 773.869.1329
presaleshelp@tripplite.com

1250W 12VDC PowerVerter Ambulance/EMS Inverter/Charger with 2 Hospital Grade Outlets

Model Number: EMS1250UL


  • 12V DC or 120VAC input; 120V AC output; 2 NEMA 5-15R hospital-grade outlets
  • 1250 watts continuous, 1875 watts OverPower™ and 2500 watts DoubleBoost™ inverter output
  • 3 stage, 14/55 amp selectable wet/dry cell battery charger
  • Auto Transfer Switching option for battery backup / UPS operation - includes wired APSRM4 remote control switch
  • Tested to vehicular inverter standards UL458 (USA) and CSA-C22.2 No. 107.1-01 (Canada). Meets GSA Ambulance Specification KKK-A-1822
  • Hospital-grade AC plug and GFCI outlets; Anderson quick connect DC wiring terminals
  • Meets OSHA requirements

  • 30-month limited warranty

Overview

Tripp Lite's EMS1250UL inverter with integrated charging system provides automatic, uninterruptible DC-to-AC power for critical on-board equipment. Ideal for installation by ambulance/EMS vehicle manufacturers, dealer or EMS service for OEM, replacements and upgrades. Supplies up to 1250 watts of continuous 120V AC power to 2 AC outlets from any 12V battery or automotive DC source. When AC cable is connected to a shore power source, commercial power passes through to connected equipment and the battery set is recharged via 3 stage, 14/55 amp selectable charging system. This unit can also function as a UPS system, responding to blackouts and voltage fluctuations with a near instantaneous automatic transfer to battery-derived AC output. Convenient Anderson DC input quick connector on the unit with extra Anderson DC input connector included in the box (user supplies batteries and cabling). Reliable large transformer design with efficient PWM sine wave output and frequency control powers resistive electronic loads or large inductive motors, compressors and other items with high current needs on startup. Included APSRM4 wired remote power switch with full status LEDs provides remote power inverter on/off switching and continuous status information (APSRM4 included). Supports an unlimited amount of runtime with any number of user-supplied batteries connected. Highly adaptable to a variety of applications and site conditions with adjustable charger settings for wet/gel battery types and selectable line to battery power transfer voltages. Includes AC input surge suppression. Includes hospital grade plug and outlets with GFI (ground fault interrupter) protection. TUV tested to UL458 (mobile inverter) and CAN/CSA-C22.2 No. 107.1-01. Meets GSA ambulance specification KKK-A-1822.

NOTE: To protect against high current draw that may occur during inverter failure, a fuse link rated at 200a should be positioned no more than 18" from the EMS1250UL's battery in the positive line.

Features

  • EMS1250UL serves as an automotive or stationary DC-to-AC inverter with automatic line-to-battery transfer and integrated battery charger
  • Supports 120V AC output from a 120V AC line power source or 12V DC battery source
  • 16.6 millisecond automatic transfer between line and battery power supports UPS protection during blackouts and voltage fluctuations for equipment compatible with a one cycle transfer time
  • 1250 watts continuous AC output in inverter mode, 1440 watts continuous AC output in AC mode
  • Double Boost™ inverter output supports momentary startup loads up to 200% of the continuous rating for up to 10 seconds
  • OverPower™ inverter output supports longer duration overloads to 150% for 1-60 minutes under ideal battery and temperature conditions. (For best results, utilize OverPower usage for as short of a duration as possible, ensure battery bank and cabling is able to provide full nominal DC voltage under load and allow inverter/charger to fully cool before and after OverPower usage.)
  • 3 stage, selectable 14/55 amp battery charger with adjustable settings for wet/gel battery types offers fast, reliable battery recharging
  • Anderson quick connect DC wiring terminals safely accept input from attached battery bank
  • Protected hardwire output passes 120V line power or inverter output through to connected equipment
  • Reliability enhanced large-transformer design tested to UL (USA) and CSA (Canada) standards
  • Moisture-resistant construction enables vehicular or marine operation in high humidity environments
  • 3 position operating mode switch supports "AUTO" mode to enable automatic transfer between DC and AC modes, CHARGE-ONLY to maintain a full battery charge when AC is present without auto transfer and SYSTEM OFF settings
  • Set of six front panel LEDs display AC/DC operational modes, overload status, DC voltage level, shutdown status and system fault status
  • Set of 4 configuration dipswitches support wet/gel battery charging profiles, adjustable 135/145V high voltage auto transfer during overvoltages and selectable 75/85/95/105V AC low voltage auto transfer during brownouts
  • Set of 4 additional configuration dipswitches support 4 levels of charger limiting relative to output load size, a battery equalization program and battery charger low/high/off settings
  • Resettable 12A charger AC input breaker and resettable 12A AC output breaker and automatic 2 speed cooling fan protect the inverter from load and temperature related failures
  • Grounding lug properly connects the inverter/charger system to earth ground or vehicle grounding system
  • Automatic overload and thermal shutoff safely turns off inverter as excessive loads or overheating conditions develop
  • Front panel remote control connector enables remote off/on switching (APSRM4 remote control switch with status LED display and 50 ft cable included). APSRM4 accessory also includes user configurable jacks to support inverter shutoff or startup as a vehicle ignition is engaged
  • Load sensing control dial enables adjustable load threshold required to automatically turn the inverter on and off in DC mode as load conditions change

Package Includes

  • EMS1250UL Inverter/Charger
  • Instruction manual with warranty information
  • Wired Remote Switch with full LED status indicators (model APSRM4)
  • 2 Anderson DC connectors (1 on the unit and 1 included in the box)
RoHS compliant

Specifications

OVERVIEW
UPC Code037332121677
OUTPUT
Frequency Compatibility60 Hz
Pure Sine Wave Output  No
Output (Watts)1250
Nominal Output Voltage(s) Supported120V
Output Receptacles(2) 5-15R
Continuous Output Capacity (Watts)1250
Peak Output Capacity (Watts)2500
Output Voltage Regulation  LINE POWER (AC): Maintains 120V nominal sine wave output from line power source. INVERTER POWER (AC): Maintains PWM sine wave output voltage of 120 V AC (+/-5%).
Output Frequency Regulation  60 Hz (+/- 0.3 Hz)
Overload ProtectionIncludes 12A input breaker dedicated to the charging system and 12A output breaker for AC output loads
Outlet Details2 Hospital-Grade GFCI duplex outlets
INPUT
Nominal Input Voltage(s) Supported120V AC
Recommended Electrical ServiceDC INPUT: Requires 12VDC input source capable of delivering 127A for the required duration (when used at full continuous capacity - DC requirements increase during Over-Power and Double-Boost operation). For automotive applications, professional hardwire
Maximum Input Amps / WattsDC INPUT: Full continuous load - 127A at 12VDC. AC INPUT: 32 amps at 120VAC with full inverter and charger load (11 A max charger-only / combined input load to support charger and AC output is automatically controllable to 66%-33%-0% based on AC output lo
Input Connection TypeDC INPUT: 175A Anderson DC connector. AC INPUT: NEMA 5-15P hospital-grade input plug
Voltage Compatibility (VAC)120
Voltage Compatibility (VDC)12
BATTERY
Expandable Battery RuntimeRuntime is expandable with any number of user supplied wet or gel type batteries
DC System Voltage (VDC)12
Battery Charge14A/55A (selectable)
Expandable RuntimeYes
USER INTERFACE, ALERTS & CONTROLS
Front Panel LEDsSet of 6 LEDs offer continuous status information on load percentage (6 levels reported) and battery charge level (7 levels reported). See manual for sequences.
Switches3 position on/off/remote switch enables simple on/off power control plus "auto/remote" setting that enables distant on/off control of the inverter system when used in conjunction with included External switch for wired remote control of APS unit APSRM4 ac
SURGE / NOISE SUPPRESSION
AC Suppression Joule Rating  760
PHYSICAL
Cooling MethodMulti-speed fan
Form Factors SupportedMounting slots enable permanent placement of inverter on any horizontal surface (see manual for additional mounting information)
Material of ConstructionPolycarbonate
Shipping Dimensions (hwd / in.)12.50 x 10.80 x 10.80
Shipping Weight (lbs.)27.10
Unit Dimensions (hwd / in.)7 x 8.75 x 9
Unit Weight (lbs.)23.2
ENVIRONMENTAL
Relative Humidity0-95% non-condensing
LINE / BATTERY TRANSFER
Transfer Time (Line Power to Battery Mode)16.6 milliseconds (typical - compatible with many computers - verify transfer time compatibility of loads for UPS applications)
Low Voltage Transfer to Battery PowerIn AC "auto" mode, inverter/charger switches to battery mode as line voltage drops to 75V (user adjustable to 85, 95, 105V - see manual)
High Voltage Transfer to Battery PowerIn AC "auto" mode, inverter/charger switches to battery mode as line voltage increases to 145V
SPECIAL FEATURES
Load SensingOptional load sense function enables automatic inverter shutoff and startup as connected equipment is powered off and on. Front panel load sense potentiometer can be set to shutoff or turn on inverter power in response to loads of any level, up to 150 watts.
TVSS Grounding  Yes, includes front panel grounding lug
CERTIFICATIONS
CertificationsTested to UL458 (USA) and CAN/CSA-C22.2 No. 107.1-01 (Canada) Also meets KKK-A-1822 (ambulance).
WARRANTY
Product Warranty Period (U.S. & Canada)30-month limited warranty

Frequently Asked Questions

Yes, we offer Pure Sine Wave Inverters. Visit our Inverters product category and filter for Pure Sine Wave Output. A pure sine wave inverter produces a smooth, sinusoidal AC output with a low level of distortion for better performance. A PWM (Pulse Width Modulated) Wave inverter produces a multi-step AC output that approximates a sinusoidal AC output with a higher level of distortion.

Additional FAQs may be available on the EMS1250UL model support page.

Accessories

Power Inverter Accessories
  Model Number Description
98-121 | Power Inverter Accessories 98-121 12VDC Sealed, Maintenance-Free Battery for All Inverter/Chargers, 12VDC Battery Connections
BP-260 | Power Inverter Accessories BP-260 External 12/24V Tower Battery Pack Enclosure for PowerVerter APS Inverter/Chargers (BP-260)
APSRM4 | Power Inverter Accessories APSRM4 Remote Control Module for Tripp Lite PowerVerter Inverters and Inverter/Chargers

Extended Warranties

Part Number Description
WEXT1H 1-Year Extended Warranty - For select Tripp Lite Products
WEXT2H 2-Year Extended Warranty - For select Tripp Lite Products
WEXT3H 3-Year Extended Warranty - For select Tripp Lite Products
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Need help with your purchase?
We're always available to help with questions, including product selection, sizing, installation and product customization. Call us at 1 773.869.1774 or email presaleshelp@tripplite.com.