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Mean Well NTU-3200-148UN True Sine Wave DC-AC Inverter 3200W 110V out 48V in with UN Socket, with AC by-pass function

SKU NTU-3200-148UN

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Overview

NTU-3200-148UN is the model of this series: typical efficiency 91%.

NTU-3200 is a 3200W highly reliable off-grid true sine wave DC-AC power inverter with built-in UPS function. Its key features include: digital design with MCU control, streamlined control circuitry that quickly responds to environmental changes and improves reliability, high quality fan with low acoustic noise, 6400W peak power, adjustable AC output voltage and frequency, -25~+70℃ wide operating temperature range, complete protection features, and etc. Combined with batteries, the NTU-3200 is suitable for use in residential, commercial, marine, automobile, mine, construction site, and remote areas with no access to utility power, and the output can be used to power fans, TV, radio, phone charger, PC/laptop, lighting, induction stove, air conditioner, electromechanical tool, communication equipment, power distribution cabinet, outdoor camping equipment, marine AC power, factory equipment, and etc.

Features

Built-in UPS function (AC by-pass)
True sine wave output (THD<3%)
High surge power up to 6400W
Temperature controlled cooling fan
AC output voltage and frequency selectable by DIP S.W
-25℃~+70℃ wide operating temperature
Power ON-OFF remote control
Front panel indicator for operation status
Protections :
Input : Reverse polarity / DC. low alarm / DC low shutdown / Over voltage
Output : Short circuit / Overload / Over temp.
Battery over discharge protection (low voltage disconnect)
Suitable for lead-acid or li-ion batteries
Remote controller
(IRC1, IRC2, IRC3 accessory sold separately, please refer to: https://www.meanwell.com/webapp/product/search.aspx?prod=IRC1 )
Support RS-232 communication(Communication cable order No.: RJ11-RS232, sold sperately)
Carry handle accessory available(Order NO.: Carry handle, sold separately)
Conformal coating
3 years warranty

Specifications

NTU-3200-148UNSpecifications from the official datasheet (2026-02-04 edition)

AC OUTPUT

RATED POWER(Continuous): 3000W
OVER RATED POWER(3 Min.): 3500W
PEAK POWER(10 Sec.): 4500W
SURGE POWER(30 Cycles): 6000W
AC VOLTAGE: Factory setting set at 110VAC 100 / 110 / 115 / 120Vac selectable by DIP S.W
FREQUENCY: Factory setting set at 60±0.1Hz 50/60Hz selectable by DIP S.W
WAVEFORM^Note.1: True sine wave (THD<3%)
AC REGULATION: ±3.0% at rated output voltage
FRONT PANEL LED: Please see page 5

DC INPUT

DC VOLTAGE: 48Vdc
VOLTAGE RANGE (Typ.): 40 ~ 66Vdc
DC CURRENT (Typ.): 75A
NO LOAD DISSIPATION (SAVING MODE)(Typ.)^Note.2: Default disable, auto detect AC output load≦10W will be changed to saving mode <15W
OFF MODE CURRENT DRAW: ≦2mA
EFFICIENCY (Typ.)^Note.1: 91%
BATTERY TYPES: Lead Acid or li-ion

PROTECTION

FUSE (INTERNAL): 25A*6
LOW ALARM: 44±1Vdc
LOW SHUTDOWN: 40±1Vdc
LOW RESTART: 50±1Vdc
HIGH ALARM: 62±1Vdc
HIGH SHUTDOWN: 66±1Vdc
HIGH RESTART: 60±1Vdc
BAT. POLARITY: By internal fuse open
OVER TEMPERATURE: Protection type : Shut down o/p voltage, re-power on to recover
OUTPUT SHORT: Protection type : Shut down o/p voltage, re-power on to recover
OVER LOAD (Typ.): 105 ~ 115% load for 180 sec., 115% ~ 150% load for 10 sec. Protection type : Shut down o/p voltage, re-power on to recover
CIRCUIT BREAKER: 30A
TB TYPE: UL458 (Only for "TB" type AC socket)

FUNCTION CONTROL

REMOTE CONNECTOR: Power ON-OFF remote control by front panel dry contact connector(by RELAY), Open : Normal work ; Short : Remote off
ACCESSORY: Remote controller sold separately, Order No.: IRC1,IRC2,IRC3
RS-232 COMMUNICATION: RS-232 ~ RJ11 Type connector (Please refer to page 4 for more details)

AC UPS MODE

AC INPUT RANGE: 100/110/115/120Vac±16%, recover±13%
FREQUENCY RANGE: 45 ~ 65Hz
TRASFER TIME(Typ.): 10ms inverter AC by pass

ENVIRONMENT

WORKING TEMP.: -25 ~ +70℃(Refer to "Derating curve")
WORKING HUMIDITY: 20% ~ 90% RH non-condensing
STORAGE TEMP., HUMIDITY: -30 ~ +70℃ / -22 ~ +158oF, 10 ~ 95% RH non-condensing
VIBRATION: 10 ~ 500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes

SAFETY & EMC

SAFETY STANDARDS: CB IEC62368-1,Dekra Seal BS EN/ EN62368-1,UL458, E13,EAC TP TC 004,AS/NZS 62368.1 approved (Please refer to next page “AC output socket” table for more details )
WITHSTAND VOLTAGE: DC I/P - AC I/P:3.0KVAC DC I/P - AC O/P:3.0KVAC AC O/P - FG:1.5KVAC
EMC EMISSION: Parameter Standard Test Level

Radiated FCC for 112,124,148 only(expect for Type-UN) Class A
Radiated BS EN/ EN55032(CISPR32) for 212,224,248 only(expect for Type-UN) Class A
Conducted FCC for 112,124,148 only(expect for Type-UN) Class A
Conducted BS EN/ EN55032(CISPR32) for 212,224,248 only(expect for Type-UN) Class A
Harmonic Current BS EN/EN61000-3-2 Class A
Voltage Flicker BS EN/EN61000-3-3 -----
EMC IMMUNITY^Note.5: BS EN/ EN55024, BS EN/ EN55035

Parameter Standard Test Level

ESD BS EN/EN61000-4-2 Level 3, 8KV air; Level 2, 4KV contact
Radiated BS EN/EN61000-4-3 Level 2
EFT / Burst BS EN/EN61000-4-4 Level 2, 1KV
Surge BS EN/EN61000-4-5 Level 3, 1KV/Line-Line 2KV/Line-Earth
Conducted BS EN/EN61000-4-6 Level 2
Magnetic Field BS EN/EN61000-4-8 Level 1
Voltage Dips and Interruptions BS EN/EN61000-4-11 >95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

Parameter	Standard	Test Level
Radiated	FCC for 112,124,148 only(expect for Type-UN)	Class A
Radiated	BS EN/ EN55032(CISPR32) for 212,224,248 only(expect for Type-UN)	Class A
Conducted	FCC for 112,124,148 only(expect for Type-UN)	Class A
Conducted	BS EN/ EN55032(CISPR32) for 212,224,248 only(expect for Type-UN)	Class A
Harmonic Current	BS EN/EN61000-3-2	Class A
Voltage Flicker	BS EN/EN61000-3-3	-----

Parameter	Standard	Test Level
ESD	BS EN/EN61000-4-2	Level 3, 8KV air; Level 2, 4KV contact
Radiated	BS EN/EN61000-4-3	Level 2
EFT / Burst	BS EN/EN61000-4-4	Level 2, 1KV
Surge	BS EN/EN61000-4-5	Level 3, 1KV/Line-Line 2KV/Line-Earth
Conducted	BS EN/EN61000-4-6	Level 2
Magnetic Field	BS EN/EN61000-4-8	Level 1
Voltage Dips and Interruptions	BS EN/EN61000-4-11	>95% dip 0.5 periods, 30% dip 25 periods, >95% interruptions 250 periods

OTHERS

MTBF: 319.3K hrs min. Telcordia TR/SR-332 (Bellcore) ; 30.3K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 420*270*98mm (L*W*H)
PACKING: 8.6Kg; 1pcs/ 10.4Kg/ 1.39CUFT

Test conditions and notes5

1.Efficiency, AC regulation and THD are tested by 2400W load, linear load at 12.5Vdc/25Vdc/50Vdc input voltage.
2.No load dissipation at non-saving mode(Typ.): 112/124/148 for 25W, 212/224/248 for 55W.
3.All parameters not specified above are measured at rated load, 25℃ of ambient temperature and set to factory setting.
4.Internal pre-start circuit, the setup time is 8s.
5.The power supply is considered as an independent unit, but the final equipment still need to re-confirm that the whole system complies with the EMC directives. For guidance on how to perform these EMC tests, please refer to “EMI testing of component power supplies.” (as available on https://www.meanwell.com//Upload/PDF/EMI_statement_en.pdf )

Technical drawings

NTU-3200-148UN AC Output Socket — AC Output Socket

NTU-3200-148UN DERATING CURVE — DERATING CURVE

NTU-3200-148UN Block Diagram — Block Diagram

NTU-3200-148UN IRC1/2/3 Remote Controller (Accessory — IRC1/2/3 Remote Controller (Accessory

NTU-3200-148UN Support RS-232 Communication — Support RS-232 Communication

NTU-3200-148UN AC Output Voltage、Frequency、Power — AC Output Voltage、Frequency、Power

NTU-3200-148UN FUNCTION MANUAL — FUNCTION MANUAL

NTU-3200-148UN MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

NTU-3200-148UN Accessory List — Accessory List

NTU-3200-148UN ※ Terminal protector mating along with NTU-3200… — ※ Terminal protector mating along with NTU-3200…

NTU-3200-148UN Illustration (page 9) — Illustration (page 9)

NTU-3200-148UN TYPICALTYPICAL APPLICATIONAPPLICATION — TYPICALTYPICAL APPLICATIONAPPLICATION

Typical applications

Downloads

Catalogues1

Mean Well Catalog (Industrial) PDF Download

FAQ

What is the Mean Well NTU-3200-148UN designed for?

The NTU-3200-148UN is a 3000W true sine wave DC-AC inverter built for converting 48V DC input to 110V AC output. It is suited to demanding power conversion applications where clean AC output and high continuous power are important. This model also includes an AC by-pass function for UPS-style operation.

Does this inverter produce true sine wave output?

Yes. The NTU-3200-148UN provides true sine wave AC output with total harmonic distortion below 3%. That makes it a better fit for sensitive electronics and equipment that perform best with cleaner power.

What input and output voltage does this model use?

This model is a 48V DC input inverter (40 ~ 66Vdc range) with 110V AC output as the factory setting. The AC output voltage is selectable by DIP switch among 100/110/115/120VAC, and the frequency between 50Hz and 60Hz. The product title specifically identifies this version as 110V out.

How much surge capacity does the NTU-3200-148UN support?

The NTU-3200-148UN is rated for 3000W continuous output and supports surge power up to 6000W. That higher short-duration surge capability helps it handle startup demands from equipment that briefly draws more than its normal running load.

Is this inverter compatible with different battery chemistries?

Yes. Mean Well specifies that the NTU-3200-148UN is suitable for lead-acid or lithium-ion batteries. Buyers evaluating battery compatibility should still confirm the broader system voltage and protection requirements match their application.

Can this inverter be used in demanding environmental conditions?

This model is built for wide-temperature operation, with a listed working range of -25°C to +70°C and output derating at higher temperatures per the derating curve. It is fan-cooled and has over-temperature protection, which supports use in harsher industrial or mobile environments.

What protection and monitoring features are included?

The NTU-3200-148UN includes protection for output short circuit, overload, over temperature, and high DC input voltage, along with low DC input voltage shutdown at 40V to protect the battery. It also has front panel status indicators and supports remote on/off control. Optional accessories are available for remote control (IRC1/IRC2/IRC3) and RS-232 communication (RJ11-RS232 cable).

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