MEAN WELL NTS-300 Series 300W High Reliable True Sine Wave DC-AC Power Inverter
Product Overview and Specifications
Key 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
- Low no-load dissipation <1.5W max. in standby saving mode
- -25℃~+65℃ wide operating temperature range
- Power ON-OFF remote control
- Front panel indicator for operation status
- Comprehensive 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
- Optional carry handle accessory available (Order No.: Carry handle, sold separately)
- Conformal coating
- 3 years warranty
Description
The MEAN WELL NTS-300 is a 300W highly reliable off-grid true sine wave DC-AC power inverter. It features digital design with MCU control for quick response to environmental changes and improved reliability. Key capabilities include 600W peak power, adjustable AC output voltage and frequency, and a wide operating temperature range of -25℃ to +65℃. With complete protection features and when combined with batteries, the NTS-300 is suitable for various applications including residential, commercial, marine, automobile, mining, construction sites, and remote areas lacking utility power. It can power devices such as fans, TVs, radios, phone chargers, PCs/laptops, lighting, electromechanical tools, communication equipment, power distribution cabinets, outdoor camping equipment, and factory machinery.
Model Encoding
The model number structure indicates key specifications:
NTS - 300 - [AC Output Voltage Code] [DC Input Voltage Code] [AC Output Socket Type]
- Series Name: NTS-300
- Rated Wattage: 300W
- AC Output Voltage: 1 (100/110/115/120Vac), 2 (200/220/230/240Vac)
- DC Input Voltage: 12 (12Vdc), 24 (24Vdc), 48 (48Vdc)
- AC Output Socket: US, EU, CN, AU, UK, UN, GFCI outlet
Example: NTS-300-112 US signifies a 300W inverter with 110Vac output, 12Vdc input, and a US socket type.
Specifications
| MODEL NO. | NTS-300-112 | NTS-300-124 | NTS-300-148 | NTS-300-212 | NTS-300-224 | NTS-300-248 | |
|---|---|---|---|---|---|---|---|
| AC Output Socket | US, GFCI, UN | EU, CN, AU, UK, UN | |||||
| RATED POWER(Continuous) | 300W | 300W | 300W | 300W | 300W | 300W | |
| OVER RATED POWER(3 Min.) | 345W | 345W | 345W | 345W | 345W | 345W | |
| PEAK POWER(10 Sec.) | 450W | 450W | 450W | 450W | 450W | 450W | |
| SURGE POWER(30 Cycles) | 600W | 600W | 600W | 600W | 600W | 600W | |
| AC VOLTAGE | Default setting set at 110VAC 100/110/115/120Vac selectable by DIP S.W | Default setting set at 230VAC 200/220/230/240Vac selectable by DIP S.W | |||||
| FREQUENCY | Default setting set at 60Hz±0.1Hz 50/60Hz selectable by DIP S.W | Default setting set at 50Hz±0.1Hz 50/60Hz selectable by DIP S.W | |||||
| WAVEFORM | True sine wave (THD<3%) | ||||||
| AC REGULATION | ±3.0% at rated output voltage | ||||||
| FRONT PANEL LED | Please refer to page 5 for details | ||||||
| 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 | 8A | 30A | 15A | 8A | |
| NO LOAD DISSIPATION (Typ.) | NON-SAVING MODE: 10W SAVING MODE: Default disable, Â≤1.2W ~ 1.5W by models @ auto detect AC output load Â≤ 10W will be changed to saving mode | NON-SAVING MODE: 12W SAVING MODE: Default disable, Â≤1.2W ~ 1.5W by models @ auto detect AC output load Â≤ 10W will be changed to saving mode | |||||
| OFF MODE CURRENT DRAW | <1mA | ||||||
| EFFICIENCY (Typ.) | 90% | 92% | 92% | 92% | 93% | 93% | |
| BATTERY TYPES | Lead Acid or li-ion | ||||||
| FUSE (Internal) | 30A*2 | 30A*1 | 10A*2 | 30A*2 | 30A*1 | 10A*2 | |
| DC INPUT PROTECTION | ALARM | 11±0.3Vdc | 22±0.5Vdc | 44±1Vdc | 11±0.3Vdc | 22±0.5Vdc | 44±1Vdc |
| LOW 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 | |
| DC INPUT PROTECTION | ALARM | 15.5±0.3Vdc | 31±0.5Vdc | 62±1Vdc | 15.5±0.3Vdc | 31±0.5Vdc | 62±1Vdc |
| HIGH 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 | Protection 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 PROTECTION | Design refer to UL458 (Only for "GFCI" AC socket, by request) | ||||||
| FUNCTION REMOTE CONTROL | Power ON-OFF remote control by front panel dry contact connector (by RELAY); Open: Normal work; Short: Remote off | ||||||
| WORKING TEMP. | -25℃~+65℃ (Refer to "Derating curve") | ||||||
| WORKING HUMIDITY | 20% ~ 90% RH non-condensing | ||||||
| STORAGE TEMP., HUMIDITY | -30℃~+70℃ / -22°F~+158°F, 10 ~ 95% RH non-condensing | ||||||
| VIBRATION | 10~500Hz, 3G 10min./1cycle, 60min. each along X, Y, Z axes | ||||||
| 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 | ||||||
| SAFETY & EMC | EMC EMISSION | 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 | 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 | ||||||
| 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 | ||||||
Notes:
- 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 needs 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)
Product Liability Disclaimer: For detailed information, please refer to https://www.meanwell.com/serviceDisclaimer.aspx
AC Output Socket Types
| 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 | TYPE-AU | TYPE-UN |
| Country | USA | USA | UNIVERSAL | EUROPE | CHINA | U.K. | AUSTRALIA | UNIVERSAL |
| Certificate | CB FC ►DEKRA | CB FC | None | CB E13 DEKRA EAC CE | CB E13 DEKRA EAC CE | CB E13 DEKRA EAC CE |
Derating Curve
The derating curve illustrates the relationship between load capacity and ambient temperature. The inverter can operate at 100% load up to 40℃. Beyond 40℃, the load capacity gradually decreases, reaching approximately 50% at 65℃.
[Diagram Description: A line graph showing Load (%) on the Y-axis and Ambient Temperature (℃) on the X-axis. The line starts at 100% load at 40℃ and decreases linearly to about 50% load at 65℃.]
Input Voltage Derating
The derating curve also shows how the maximum load is affected by the DC input voltage. For example, at 12Vdc input, the maximum load is approximately 100% at 10.5Vdc and derates to 50% at 16.5Vdc. Similar derating applies to 24Vdc and 48Vdc inputs.
[Diagram Description: A line graph showing Load (%) on the Y-axis and DC Input Voltage (Vdc) on the X-axis. Multiple lines represent different ambient temperatures. The graph shows that as ambient temperature increases, the maximum allowable load decreases.]
Remote ON-OFF Control
The inverter can be controlled remotely for power ON/OFF using a dry contact connection.
| Remote ON-OFF | AC Output Status |
|---|---|
| Open | Power inverter ON |
| Short | Power inverter OFF |
AC Output Voltage, Frequency, and Power Saving Mode Selection
Users can adjust the AC output voltage, frequency, and power saving mode using DIP switches (SW1-SW4) located on the panel.
| SW1 | SW2 | SW3 | SW4 |
|---|---|---|---|
| OFF | OFF | ON: 50Hz | ON: Saving mode |
| OFF | ON | OFF: 60Hz | OFF: Non-Saving mode |
| ON | OFF | ||
| ON | ON |
Voltage Settings:
- SW1 OFF, SW2 OFF: 100Vac or 200Vac
- SW1 OFF, SW2 ON: 110Vac or 220Vac
- SW1 ON, SW2 OFF: 115Vac or 230Vac
- SW1 ON, SW2 ON: 120Vac or 240Vac
[Diagram Description: A diagram showing the front panel with DIP switches labeled 1, 2, 3, 4. It also shows the remote control (R.C) switch and status indicators for DC input and load.]
LED Status Indicators
The front panel LEDs provide status information:
Normal Work:
| Status | Green | Orange | Red |
|---|---|---|---|
| System Status | System check | Remote off | Abnormal Status |
| Inverter Status | Inverter OK | Saving mode | (See below table) |
DC Input Voltage Status:
| DC Input | Green | Orange | Red |
|---|---|---|---|
| Voltage Range | 12.5~15.5Vdc | 11~12.5Vdc | <11Vdc or >15.5Vdc |
| 25~31Vdc | 22~25Vdc | <22Vdc or >31Vdc | |
| 50~62Vdc | 44~50Vdc | <44Vdc or >62Vdc |
Load Status:
| Load | Green | Orange | Red |
|---|---|---|---|
| Load Percentage | <40% load | 40~80% load | >80% load |
Abnormal Status Indications:
| LED Indicator | Abnormal Indication |
|---|---|
| Status, DC Input, Load | Output overload or AC output short circuit |
| Status, DC Input | Abnormal DC voltage |
| Status, DC Input | Over temperature or Fan lock |
| Status, DC Input | Inverter fail |
Light Status: Light ON, Light OFF, Flash.
Mechanical Specification
The inverter has a compact design with dimensions of 210mm (Length) x 130mm (Width) x 55mm (Height).
[Diagram Description: A diagram showing the top, side, and front views of the inverter unit with dimensions labeled. It also shows the layout of DC input terminals and AC output sockets for different types (EU, US, CN, UN).]
DC Input Side: Features positive (+) and negative (-) terminals, a chassis bonding lug, and a remote control switch (R.C SW). A warning indicates that reverse polarity will damage the unit.
AC Output Side: Features AC output sockets, varying by model type (e.g., US, EU, CN, UN).
Remote Control Connector: Uses JST B-XH or equivalent mating housing and JST SXH-001T or equivalent terminal. Pin 1,2 Open: Normal work; Pin 1,2 Short: Remote off.
Accessory List
Optional accessories are available:
- Carry Handle: An optional accessory for easier portability. (MW's Order No. 1)
- Foot pad: (MW's Order No. 2)
- Screw: (MW's Order No. 3)
[Diagram Description: Illustrations show the handle, foot pads, and screws, along with their dimensions and quantities.]
Typical Applications
The NTS-300 inverter is versatile and used in various off-grid and mobile power solutions:
- Residential/Home Use: Powering appliances, lighting, and electronics in homes or RVs, often connected to a battery bank and potentially a solar charger.
- Marine/Yacht Use: Providing AC power on boats, connected to battery banks and shore power chargers.
- Vehicle Use: Powering devices in cars, trucks, or recreational vehicles.
- Remote Areas: Supplying power where grid electricity is unavailable, such as construction sites or remote cabins.
[Diagram Description: Three scenarios are depicted: 1. A house with solar panels, battery bank, inverter, and AC outlets. 2. A yacht with utility input, battery charger, battery bank, inverter, and AC outlets. 3. An RV with battery bank, inverter, and AC outlets.]
Installation Manual
For detailed installation instructions, please refer to the official manual available at: http://www.meanwell.com/manual.html
