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Mean Well NTS-400P-224 True Sine Wave DC-AC Inverter 400W 230V out 24V in

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

SKU NTS-400P-224

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Overview

NTS-400P-224 is the model of this series: typical efficiency 93%.

NTS-400P is a 400W highly reliable built-in type 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, compact size, light weight, 800W peak power, adjustable AC output voltage and frequency, -20~+70℃ wide operating temperature range, built-in remote ON/OFF control, low no-load power consumption (energy saving mode < 1.5W max. ), complete protection features, and etc. Combined with batteries, the NTS-400P is suitable for use in residential, commercial, marine, automobile, 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, outdoor camping equipment, marine AC power, and etc.

Features

Compact size and light weight
True sine wave output (THD<3%)
High surge power up to 800W
250W convection, 400W forced air
AC output voltage and frequency selectable by DIP S.W
No load dissipation <1.5W max. at standby saving mode
-20℃~+70℃ wide operating temperature
Power ON-OFF remote control
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
Support Tx/Rx for monitoring power inverter status
Conformal coating
3 years warranty

Specifications

NTS-400P-224Specifications from the official datasheet (2026-03-26 edition)

AC OUTPUT

RATED POWER(Continuous): 400W
OVER RATED POWER(3 Min.): 460W
PEAK POWER(10 Sec.): 600W
SURGE POWER(30 Cycles): 800W
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
LED STATUS: Please refer to page3

DC INPUT

DC VOLTAGE: 24V
VOLTAGE RANGE (Typ.): 20 ~ 33Vdc
DC CURRENT (Typ.): 20A
NO LOAD DISSIPATION (Typ.) Non-Saving mode: 10W
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: 1.3W
OFF MODE CURRENT DRAW: <1mA at battery ~DC input must be disconnected
EFFICIENCY (Typ.)^Note.1: 93%
BATTERY TYPES: Lead Acid or Li-ion

PROTECTION

FUSE(Internal): 30A*2
DC INPUT LOW ALARM: 22±0.5Vdc
DC INPUT LOW SHUTDOWN: 20±0.5Vdc
DC INPUT LOW RESTART: 25±0.5Vdc
DC INPUT HIGH ALARM: 31±0.5Vdc
DC INPUT HIGH SHUTDOWN: 33±0.5Vdc
DC INPUT HIGH RESTART: 30±0.5Vdc
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

FUNCTION

REMOTE CONTROL: Power ON-OFF remote control by front panel dry contact connector (by RELAY), Open : Normal work ; Short : Remote off
Tx/Rx: Support Tx/Rx for monitoring power inverter status

ENVIRONMENT

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

SAFETY & EMC (Note.4)

SAFETY STANDARDS: CB IEC62368-1 2ed, CSA/UL 62368-1 3ed for all models; E13, EAC TPTC004, AS/NZS 62368.1 for NTS-400P-212/224/248 approved (Please refer to next page “Safety overview” table for more details)
WITHSTAND VOLTAGE: 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 Class A
Radiated BS EN/EN55032(CISPR32) for 212,224,248 only 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 4, 15KV air; Level 4, 8KV contact
Radiated BS EN/EN61000-4-3 Level 3, 10V/m
Magnetic Field BS EN/EN61000-4-8 Level 4, 30A/m

Parameter	Standard	Test Level
Radiated	FCC for 112,124,148 only	Class A
Radiated	BS EN/EN55032(CISPR32) for 212,224,248 only	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 4, 15KV air; Level 4, 8KV contact
Radiated	BS EN/EN61000-4-3	Level 3, 10V/m
Magnetic Field	BS EN/EN61000-4-8	Level 4, 30A/m

OTHERS

MTBF: 836.2K hrs min. Telcordia TR/SR-332 (Bellcore) ; 84K hrs min. MIL-HDBK-217F (25℃)
DIMENSION: 186*100.5*34mm (L*W*H)
PACKING: 0.75Kg; 18pcs/ 14.5Kg/ 1.01CUFT

Test conditions and notes4

1.Efficiency, AC regulation and THD are tested by 400W, 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-400P-224 Safety Overview — Safety Overview

NTS-400P-224 Block Diagram — Block Diagram

NTS-400P-224 DERATING CURVE — DERATING CURVE

NTS-400P-224 Remote ON-OFF Control — Remote ON-OFF Control

NTS-400P-224 AC output voltage、Frequency、Power — AC output voltage、Frequency、Power

NTS-400P-224 MECHANICAL SPECIFICATION — MECHANICAL SPECIFICATION

NTS-400P-224 Accessory List — Accessory List

NTS-400P-224 TYPICAL APPLICATION — TYPICAL APPLICATION

Typical applications

Downloads

Certificates7

Mean Well NTS-250P-400P-ICES Certificate PDF Download

Mean Well NTS-250P-400P-CB Certificate PDF Download

Mean Well NTS-250P-400P-E13 Certificate PDF Download

Mean Well NTS-250P-400P-FCC Certificate PDF Download

Mean Well NTS-250P-400P-EMC Certificate PDF Download

Mean Well NTS-250P-400P-CE-dec Certificate PDF Download

Mean Well NTS-250P-400P-UK-dec Certificate PDF Download

Test reports1

Mean Well NTS-400P-224 Test Report PDF Download

FAQ

What is the Mean Well NTS-400P-224 designed for?

The NTS-400P-224 is a 400W true sine wave DC-AC inverter that converts 24V DC input power to 230V AC output. It is suited to applications that need utility-style AC power from a DC battery source, including commercial, industrial, and mobile power systems.

Does this inverter provide a true sine wave output?

Yes. This model delivers a true sine wave AC output with total harmonic distortion below 3%, which makes it a better fit for sensitive electronics than modified sine wave inverters. Its nominal output for this version is 230V AC.

What input voltage does the NTS-400P-224 require?

This model is built for 24V DC input systems. It is also described as suitable for lead-acid or lithium-ion battery applications, making it relevant for buyers standardizing on a 24V battery platform.

Can this inverter handle startup surges above its rated power?

Yes. The NTS-400P-224 has a continuous power rating of 400W and supports surge power up to 800W. That can help with loads that briefly draw more power at startup than during normal operation.

Is this inverter suitable for demanding environmental conditions?

It is designed for a wide operating temperature range of -20°C to +70°C, with reference to the output derating curve at higher temperatures. It is also rated for 20% to 90% RH non-condensing humidity and 10 to 500Hz, 3G vibration.

What protection features are included in the NTS-400P-224?

This inverter includes protection for output short circuit, overload and over-temperature conditions. It also has DC input low and high voltage alarm and shutdown (low shutdown at 20V, high at 33V) and polarity protection by internal fuse, helping protect the connected DC power source.

How does this model differ from basic or modified sine wave inverters?

The main difference is its true sine wave output, which more closely matches standard AC mains power. The NTS-400P-224 also offers selectable AC output voltage and frequency by DIP switch, remote power on-off capability, and Tx/Rx status monitoring support.

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Model	Power	Voltage	Waveform	Frequency
Mean Well NTS-400P-248 True Sine Wave DC-AC Inverter 400W 230V out 48V in	400W	230V	True Sine Wave	50Hz	View
Mean Well NTS-400P-212 True Sine Wave DC-AC Inverter 400W 230V out 12V in	400W	230V	True Sine Wave	50Hz	View

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