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Mean Well NTS-450-248AU True Sine Wave DC-AC Inverter 450W 230V out 48V in with AU Socket

fanless designhigh efficiency up to 93%200% peak power capabilitybuilt-in dip switch to adjust AC output voltagefrequency and work mode

SKU NTS-450-248AU

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Overview

NTS-450-248AU is the model of this series: typical efficiency 93%.

NTS-450 is a 450W highly reliable off-grid true sine wave DC-AC power inverter. 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, 900W peak power, adjustable AC output voltage and frequency, -25~+70℃ wide operating temperature range, complete protections features, and etc. combined with batteries, the NTS-450 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, electromechanical tool, communication equipment, power distribution cabinet, outdoor camping equipment, marine AC power, factory equipment, and etc.

Features

Compact size and light weight
True sine wave output (THD<3%)
High surge power up to 900W
Temperature controlled cooling fan
AC output voltage and frequency selectable by DIP S.W
No load disspation <1.5W max. at standby saving mode
-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
Carry handle accessory available(Order NO.: Carry handle, sold separately)
Conformal coating
3 years warranty

Specifications

NTS-450-248AUSpecifications from the official datasheet (2024-11-25 edition)

AC OUTPUT

RATED POWER(Continuous): 450W
OVER RATED POWER(3 Min.): 517.5W
PEAK POWER(10 Sec.): 675W
SURGE POWER(30 Cycles): 900W
AC VOLTAGE: Default setting set at 230VAC 200 / 220 / 230 / 240Vac selectable by DIP S.W
FREQUENCY: Default setting set at 50Hz±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 refer to page5

DC INPUT

DC VOLTAGE: 48V
VOLTAGE RANGE (Typ.): 40 ~ 66Vdc
DC CURRENT (Typ.): 14A
NO LOAD DISSIPATION (Typ.) NON-SAVING MODE: 12W
NO LOAD DISSIPATION (Typ.) SAVING MODE: Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load ≦10W will be changed to saving mode
NO LOAD DISSIPATION (Typ.) SAVING MODE: 1.5W
OFF MODE CURRENT DRAW: ≦1mA
EFFICIENCY (Typ.)^Note.1: 93%
BATTERY TYPES: Lead Acid or li-ion

PROTECTION

FUSE (Internal): 10A*2
DC INPUT LOW ALARM: 44±1Vdc
DC INPUT LOW SHUTDOWN: 40±1Vdc
DC INPUT LOW RESTART: 50±1Vdc
DC INPUT HIGH ALARM: 62±1Vdc
DC INPUT HIGH SHUTDOWN: 66±1Vdc
DC INPUT 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
GFCI PROCTECTION: None

FUNCTION

REMOTE CONTROL: Power ON-OFF remote control by front panel dry contact connector (by RELAY); Open : Normal work ; Short , Remote off

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,CSA/UL62368-1,Dekra BS EN/EN62368-1,E13,EAC TP TC 004 approved;Design refer to AS/NZS 62368.1 (Please refer to next page “AC output socket” table for more details ) ; Design refer to UL458 (By request)
WITHSTAND VOLTAGE: DC I/P - AC O/P:3.0KVac AC O/P - FG:1.5KVac
EMC EMISSION: Parameter Standard Test Level

FCC for 112,124,148 only(expect for Type-UN) Class A
BS EN/EN55032(CISPR32) for 212,224,248 only(expect for Type-UN) Class A
Harmonic Current BS EN/EN61000-3-2
Voltage Flicker BS EN/EN61000-3-3
EMC IMMUNITY: 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 , 3V/m
Magnetic Field BS EN/EN61000-4-8 Level 1 , 1A/m

Parameter	Standard	Test Level
FCC for 112,124,148 only(expect for Type-UN)	Class A
BS EN/EN55032(CISPR32) for 212,224,248 only(expect for Type-UN)	Class A
Harmonic Current	BS EN/EN61000-3-2
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 , 3V/m
Magnetic Field	BS EN/EN61000-4-8	Level 1 , 1A/m

OTHERS

MTBF: 843.9K hrs min. Telcordia TR/SR-332 (Bellcore) ; 85K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 210*130*55mm (L*W*H)
PACKING: 1.66Kg; 8pcs/ 14.3Kg/ 1.74CUFT for Type-US 1.3Kg; 8pcs/ 11.4Kg/ 1.74CUFT for other types

Test conditions and notes4

1.Efficiency, AC regulation and THD are tested by 450W, linear load at 12.5Vdc/25Vdc/50Vdc input voltage.
2.All parameters not specified above are measured at rated load, 25℃ of ambient temperature and set to factory setting.
3.Internal pre-start circuit, the setup time is 8s.
4.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

NTS-450-248AU AC Output Socket — AC Output Socket

NTS-450-248AU DERATING CURVE — DERATING CURVE

NTS-450-248AU AC Output Voltage、Frequency、Power — AC Output Voltage、Frequency、Power

NTS-450-248AU MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

NTS-450-248AU Accessory List — Accessory List

NTS-450-248AU TYPICAL APPLICATION — TYPICAL APPLICATION

Typical applications

Downloads

Certificates6

MeanWell NTS-300 and NTS-450 Certificate PDF Download

FAQ

What is the Mean Well NTS-450-248AU used for?

The NTS-450-248AU is a 450W true sine wave DC-AC inverter designed to convert 48V DC input into 230V AC output. It is suited to applications that need clean AC power from a DC battery source, including commercial, industrial, and mobile power systems.

Does this inverter produce true sine wave output?

Yes. The NTS-450-248AU provides a true sine wave output with total harmonic distortion below 3%, which helps support sensitive AC equipment better than modified sine wave alternatives. This makes it a stronger choice where output quality matters.

What input and output voltages does the NTS-450-248AU support?

This model is built for 48V DC input and is specified here with 230V AC output. The product data also states that AC output voltage and frequency are selectable by DIP switch, with multiple voltage options listed including 200V, 220V, 230V, and 240V AC.

Can this inverter handle startup surges above its rated power?

Yes. Although its continuous power rating is 450W, it supports surge power up to 900W. The specification also lists overload capability of 105 to 115% load for 180 seconds and 115 to 150% load for 10 seconds.

Is the NTS-450-248AU suitable for harsh or variable environments?

It is designed for a wide operating temperature range of -25°C to +70°C, with output derated at higher temperatures per the derating curve, and has conformal coating for added durability. The inverter also uses a temperature-controlled cooling fan and includes protection for short circuit, overload, over voltage, and battery low voltage disconnect.

What battery types is the NTS-450-248AU compatible with?

The product is stated to be suitable for lead-acid or li-ion batteries. Its low voltage disconnect feature also helps protect the battery from over-discharge during operation.

What are the size, weight, and warranty for this inverter?

The listed dimensions are 210 x 130 x 55 mm, and the product weight is 1.3 kg. Mean Well specifies a 3-year warranty for this model.

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Model	Power	Voltage	Waveform	Frequency
Mean Well NTS-450-212AU True Sine Wave DC-AC Inverter 450W 230V out 12V in with AU Socket	450W	230V	True Sine Wave	50Hz	View
Mean Well NTS-450-224AU True Sine Wave DC-AC Inverter 450W 230V out 24V in with AU Socket	450W	230V	True Sine Wave	50Hz	View

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