10000 Woodward Avenue
Woodridge, Illinois 60517
+1 773-869-1776
+1 (773) 869-1329
United States
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Product Status Discontinued on 9/11/2020


Tripp Lite UT1250UL Utility Work Truck Inverter / Charger are the quiet alternative to gas generators with no fumes, fuel or noise. It provides equipment with utility or generator supplied AC electricity filtered through premium ISOBAR surge protection. This DC-to-AC inverter with automatic line to battery transfer and integrated charging system serves as an extended run UPS, a standalone power source or an automotive inverter suitable for rugged work site applications. Supplies up to 1250 watts of continuous 120V AC power from any 12V DC battery or automotive DC source. OverPower inverter output feature temporarily provides up to 150% of the continuous output for 1-60 minutes, and DoubleBoost inverter output feature delivers up to 200% of continuous output for up to 10 seconds, providing the extra power needed to start heavy-duty tools and motorized equipment. When AC cable is connected to a live wall socket, commercial power passes through to connected equipment and the battery set is recharged via 3-stage selectable 10/40Amp charging system. In UPS mode, the UT system responds to blackouts and voltage fluctuations with a near instantaneous automatic transfer to battery derived AC output. A set of high current DC input terminals is included for simple installation (user supplies batteries and cabling – see owners manual for recommendations). Passes sine wave utility or generator power during battery charging and UPS line power operation, plus efficient PWM sine wave AC output in inverter and UPS backup modes. Reliable large transformer design, with frequency control, powers resistive electronic loads or large inductive motors, compressors and other devices with high current needs on startup. Included is the APSRM4 wired remote power switch with full status LED’s, which provides remote power inverter on/off switching and continuous status information. The UT1250UL supports an unlimited amount of runtime with user-supplied batteries.

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 UT1250UL's battery in the positive line.


  • 16.6 millisecond automatic transfer between line and battery power supports UPS protection for equipment compatible with a one cycle transfer time
  • 1250W continuous AC output in inverter mode, 2500W continuous AC output in AC mode
  • DoubleBoost output supports momentary startup loads of up to 200% of the continuous rating for up to 10 seconds - OverPower output supports duration overloads to 150% for 1-60 minutes under ideal battery and temperature conditions
  • 3-stage selectable 10/40 Amp battery charger with adjustable settings for wet/gel/AGM battery types
  • 2 NEMA 5-15R GFCI protected outlets pass 120V line power or inverter output through to connected equipment
  • 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 6 front panel LED’s display continuous status
  • Set of 4 dip switches support wet/gel/AGM battery charging profiles, adjustable 135/145V high voltages and selectable 75/85/95/105V AC low voltage auto transfer during brownouts
  • Set of 4 additional dip switches support 4 levels of charger limiting relative to output load size, a battery equalization program and battery charger low/high settings
  • Resettable 10A charger AC input breaker and settable 12A AC output breaker and automatic 2-speed cooling fan
  • Automatic overload and thermal (overheating) shutoff
  • Front panel remote control connector enables remote off/on switching with included APSRM4 remote
  • Load sensing control dial enables adjustable load threshold required to automatically turn the inverter on and off in DC mode as load conditions change
  • Includes a battery temperature sensor with 20 foot cable to prolong battery life by adjusting the charge level based on battery temperature

Package Includes

  • UT1250UL Inverter/Charger
  • APSRM4 Remote
  • Remote battery temperature sensor cable
  • Instruction manual with warranty information
RoHS compliant


UPC Code037332124418
Nominal Input Voltage(s) Supported120V AC
Maximum Input Amps / WattsDC INPUT: Full continuous load 127A at 12 VDC. AC INPUT 20 amps at 120 VAC with full inverter and charger load 12A max charge only)
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). AC INPUT: 15A 120VAC recommended
Input Connection TypeDC INPUT: set of two (2) DC bolt-down terminals. AC INPUT: NEMA 5-15R GFCI input plug
Input Cord Length DetailsDC INPUT: User supplies cabling. 6 gauge or larger (see manual) AC INPUT: attached 6ft. AC line cord with plug.
Voltage Compatibility (VAC)120
Voltage Compatibility (VDC)12
Frequency Compatibility60 Hz
Pure Sine Wave Output  No
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 Source. Inverter Power (AC) Maintains PWM sine wave output voltage of 120 VAC (+/- 5%)
Output Frequency Regulation  60 Hz (+/- 0.3Hz)
Overload ProtectionIncludes 10A input breaker dedicated to the charging system and 12A output breaker for AC output loads.
Outlet Details2 NEMA 5-15R GFCI protected outlets
Expandable RuntimeYes
DC System Voltage (VDC)12
Battery Pack Accessory (Optional) 98-121  sealed lead acid battery (optional)
Battery Charge10A / 40A (selectable)
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"
AC Suppression Joule Rating  600
Material of ConstructionPolycarbonate
Cooling MethodMulti-speed fan
Form Factors SupportedMounting slots enable permanent placement of inverter on any horizontal surface.(see manual for additional mounting information)
Receptacle ColorWhite
Shipping Dimensions (hwd / in.)12.50 x 10.40 x 10.70
Shipping Weight (lbs.)26.50
Unit Dimensions (hwd / in.)7.000 x 8.750 x 9.000
Unit Weight (lbs.)23.2
Relative Humidity0-95% non-condensing
Transfer Time (Line Power to Battery Mode)16.6 milliseconds (typical -compatible with many computers, servers and networking equipment -verify transfer time compatibility 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 85,95,105- see manual)
High Voltage Transfer to Battery PowerIn AC "auto" mode, inverter / charger switches to battery mode as line voltages increases to 135V (user adjustable to 145 -see manual)
Load SensingLoad 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.
Product Warranty Period (U.S. & Canada)30-month limited warranty

Questions & Answers



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

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