MEAN WELL NTS-300 Series Sine Wave Output DC-AC Inverter Installation Guide

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

Applications

Mobile device

Home and office appliance
Power tools

Portable equipment
Vehicle

Yacht
Off-grid solar power system

Wireless network
Telecom or datacom system

Description

NTS-300 is a 300W 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, 600W peak power, adjustable AC output voltage and frequency, -25°C~+65°C wide operating temperature range, complete protections features, and etc. Combined with batteries, the NTS-300 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.

Model Encoding
NTS – 300 – 1 12 US

AC output socket (Type US, EU, CN, AU, UK, UN, GFCI outlet)
DC input voltage (12: 12Vdc, 24: 24Vdc, 48: 48Vdc)
AC output voltage (1: 100/110/115/120Vac, 2: 200/220/230/240Vac)
Rated wattage
Series name

Specifications

Model No.	NTS-300-112	NTS-300-124	NTS-300-148	NTS-300-212	NTS-300-224	NTS-300-248
Rated Power (Continuous)	300W	300W	300W	300W	300W	300W
Over Rated Power (3 min)	450W	450W	450W	450W	450W	450W
Surge Power (30 cycles)	600W	600W	600W	600W	600W	600W

AC Output Socket

Model No.	NTS-300-112	NTS-300-124	NTS-300-148	NTS-300-212	NTS-300-224	NTS-300-248
Socket Type	TYPE-US	TYPE-GFCI	TYPE-UN	TYPE-EU	TYPE-CN	TYPE-UK
Country	USA	USA	UNIVERSAL	EUROPE	CHINA	U.K
Certificate	CB, FC, DEKRA	CB, FC	None	CB, FC, DEKRA	CB, FC, DEKRA	CB, FC, DEKRA

Derating Curve
The derating curve shows the load percentage against ambient temperature. The load decreases as the temperature increases beyond a certain point.

Remote ON-OFF Control

Remote ON-OFF	AC Output Status
Open	Power inverter ON
Short	Power inverter OFF

AC Output Voltage, Frequency, Power Saving Mode Selectable by DIP SW
Output voltage and frequency setting factory settings are either 110Vac/60Hz or 230Vac/50Hz, users are able to adjust the voltage and frequency, through the DIP switch of position 1,2,3,4 on the panel.

LED Status

Status	Green	Orange	Red
Normal Work	System check, Inverter OK	Remote off, Saving mode	Abnormal Status
DC Input	12.5~15.5Vdc, 25~31Vdc, 50~62Vdc	11~12.5Vdc, 22~25Vdc, 44~50Vdc	<11Vdc or >15.5Vdc, <22Vdc or >31Vdc, <44Vdc or >62Vdc
Load	<40% load	40~80% load	>80% load

Mechanical Specification
Dimensions and layout for installation are provided in the diagrams.

Accessory List
Carry handle (Optional accessory, Power inverter and Pull handle should be ordered separately)

MW’s Order No.	Item	Quantity
	Handle	1
	Foot pad	4
	Screw	2

Typical Application
Illustrations show the inverter used in various settings such as homes, boats, and RVs, indicating connections to battery banks and AC outlets.

Installation Manual
For detailed installation instructions, visit: http://www.meanwell.com/manual.html

FAQ

What is the peak power of the NTS-300 inverter?
The peak power is 600W.

What protections does the inverter offer?
It offers protections against reverse polarity, DC low alarm/shutdown, over voltage, short circuit, overload, and over temperature.
Is the inverter suitable for outdoor use?
Yes, it is suitable for use in remote areas with no access to utility power.
Can the output voltage and frequency be adjusted?
Yes, they can be adjusted using the DIP switch on the panel.

300W High Reliable True Sine Wave DC-AC Power Inverter

Features

Compact size and light weight
True sine wave output (THD<3%)

High surge power up to 600W

Fanless design

AC output voltage and frequency selectable by DIP S.W

No load disspation <1.5W max. at standby saving mode -250&+650C wide operating temperature
Power ON-OFF remote control
Front panel indicator for operation status

Protections :

Input : Reverse polarity / DC low alarm / DC low shutdown / Overvoltage
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

Applications

Mobile device
Home and office appliance
Power tools

Portable equipment
Vehicle
Yacht

Off-grid solar power system
Wireless network
Telecom or datacom system

GTIN CODE
MW Search: https://www.meanwell.com/serviceGTlN.aspx

Description
NTS-300 is a 300W 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, 600W peak power, adjustable AC output voltage and frequency, -2++650 wide operating temperature range, complete protections features, and etc. combined with batteries, the NTS-300 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.

Model Encoding

SPECIFICATION

MODEL NO.

NTS-300-112

NTS-300-124

NTS-300-148

NTS-300-212

NTS-300-224

NTS-300-248

= US, GFCI, UN

EU, CN, AU, UK, UN

AC OUTPUT

RATED POWER(Continuous)

300W

OVER RATED POWER(3 Min.)

345W

PEAK POWER(10 Sec.)

450W

SURGE POWER(30 Cycles)

600W

AC VOLTAGE

Default setting set at 110VAC

Default setting set at 230VAC

100 / 110 / 115 / 120Vac selectable by DIP S.W

200 / 220 / 230 / 240Vac selectable by DIP S.W

FREQUENCY

Default setting set at 60Hz±0.1Hz

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

12V

24V

48V

12V

24V

48V

VOLTAGE RANGE (Typ.)

10 ~ 16.5Vdc

20 ~ 33Vdc

40 ~ 66Vdc

10 ~ 16.5Vdc

20 ~ 33Vdc

40 ~ 66Vdc

DC CURRENT (Typ.)

30A

15A

30A

15A

NO LOAD DISSIPATION

(Typ.)

NON-SAVING MODE

10W

12W

10W

12W

SAVING MODE

Default disable, ≦1.2W ~ 1.5W by models @ auto detec AC output load ≦10W will be changed to saving mode

1.2W

1.3W

1.5W

1.2W

1.3W

1.5W

OFF MODE CURRENT DRAW

≦1mA

EFFICIENCY (Typ.) Note.1

90%

92%

93%

BATTERY TYPES

Lead Acid or li-ion

PROTECTION

DC INPUT

FUSE (Internal)

30A*2

30A*1

10A*2

30A*2

30A*1

10A*2

LOW

ALARM

11±0.3Vdc

22±0.5Vdc

44±1Vdc

11±0.3Vdc

22±0.5Vdc

44±1Vdc

SHUTDOWN

10±0.3Vdc

20±0.5Vdc

40±1Vdc

10±0.3Vdc

20±0.5Vdc

40±1Vdc

RESTART

12.5±0.3Vdc

25±0.5Vdc

50±1Vdc

12.5±0.3Vdc

25±0.5Vdc

50±1Vdc

HIGH

ALARM

15.5±0.3Vdc

31±0.5Vdc

62±1Vdc

15.5±0.3Vdc

31±0.5Vdc

62±1Vdc

SHUTDOWN

16.5±0.3Vdc

33±0.5Vdc

66±1Vdc

16.5±0.3Vdc

33±0.5Vdc

66±1Vdc

RESTART

15±0.3Vdc

30±0.5Vdc

60±1Vdc

15±0.3Vdc

30±0.5Vdc

60±1Vdc

BAT. POLARITY

By internal fuse open

AC OUTPUT

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

Design refer to UL458

(Only for “GFCI” AC socket , by request)

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 ~ +65℃(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 (Note.4)

SAFETY STANDARDS

CB IEC62368-1,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 / Note

Radiated

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 / Note

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

845.6K hrs min. Telcordia TR/SR-332 (Bellcore) ; 85.3K hrs min. MIL-HDBK-217F (25℃)

DIMENSION

210*130*55mm (L*W*H)

PACKING

1.3Kg; 8pcs/ 11.4Kg/ 1.74CUFT

NOTE

Efficiency, AC regulation and THD are tested by 300W, linear load at 12.5Vdc/25Vdc/50Vdc input voltage.
All parameters not specified above are measured at rated load, 25℃ of ambient temperature and set to factory setting.
Internal pre-start circuit, the setup time is 8s.
The power supply is considered as an independent unit, but the final equipment still need to 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
Product Liability Disclaimer：For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx

AC Output Socket

DERATING CURVE

Remote ON-OFF Control

Remote ON-OFF	AC Output Status
Open	power inverter ON
Short	power inverter OFF

AC Output Voltage、Frequency、Power saving mode selectable by DIP SW
Output voltage and frequency setting factory settings are either 110Vac/60Hz or 230Vac/50Hz, users are able to adjust the voltage and frequency, through the DIP switch of position 1,2,3,4 on the panel.

AC Output Voltage、 Frequency、Power saving mode selectable by DIP SW
SW1	SW2		SW3	SW4
OFF	OFF :	100Vac or 200Vac	ON : 50Hz	ON : Saving mode
OFF	ON :	110Vac or 220Vac	ON : 50Hz	ON : Saving mode
ON	OFF :	115Vac or 230Vac	OFF: 60Hz	OFF: Non-Saving mode
ON	ON :	120Vac or 240Vac	OFF: 60Hz	OFF: Non-Saving mode

LED STATUS

Normal work

Abnormal status

Light
Light off
Flash

MECHANICAL SPECIFICATION

R.C Connector : JST B-XH or equivalent

Remote Control	Mating Housing	Terminal
Pin 1,2 Open: Normal work	JST XHP or equivalent	JST SXH-001T or equivalent
Pin 1,2 Short: Remote off	JST XHP or equivalent	JST SXH-001T or equivalent

Accessory List

Carry handle (Optional accessory, Power inverter and Pull handle should ordered seperately)

Handle
Foot pad

TYPICAL APPLICATION

Battery Bank
Off-Grid DC/AC Solar Inverter (NTS series)
AC Outlet

Utility Input (Shore)1
AC/DC Battery Charger (PB/NPB/NPP series)

Battery Bank
Off-Grid DC/AC
Power Inverter (NTS series)
AC Outlet

AC/DC Battery Charger (PB/NPB/NPP series)
Battery Bank

Off-Grid DC/AC Inverter (NTS series)
AC Outlet

INSTALLATION MANUAL

Please refer to : http://www.meanwell.com/manual.html

File Name:NTS-300-SPEC 2024-02-23

Documents / Resources

MEAN WELL NTS-300 Series Sine Wave Output DC-AC Inverter [pdf] Installation Guide
NTS-300 Series Sine Wave Output DC-AC Inverter, NTS-300 Series, Sine Wave Output DC-AC Inverter, Output DC-AC Inverter, DC-AC Inverter, Inverter

References

User Manual

MEAN WELL NTS-300 Series Sine Wave Output DC-AC Inverter

SPECIFICATION

DERATING CURVE

LED STATUS

Accessory List

TYPICAL APPLICATION

INSTALLATION MANUAL

Documents / Resources

References

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