MEAN WELL NTS-1200-212EU is an off-grid true sine wave DC/AC inverter with 1200 W continuous output from a nominal 12 VDC battery supply. This European receptacle model is factory-set to 230 VAC at 50 Hz, with selectable output voltage and frequency, temperature-controlled fan cooling and remote ON/OFF control.
Product Datasheet
Download MEAN WELL NTS-1200 Datasheet (PDF)
The NTS-1200 section is on PDF pages 1, 2, 3, 4, 5, 6, 7, 8. Refer to the complete mechanical drawings and notes when planning installation.
Model and AC Output Configuration
Series: NTS-1200; Complete ordering model: NTS-1200-212EU; Product type: Off-grid true sine wave DC/AC inverter.
AC output interface: European receptacle; Model-code interpretation: 2 selects the 200/220/230/240 VAC output range; 12 identifies the nominal DC input; EU identifies the AC output interface.
This SKU is the European receptacle configuration.
Select a lead-acid or lithium-ion battery system compatible with the DC input range and protection thresholds. This inverter supplies isolated off-grid AC loads; a battery charger, battery management system and any grid-transfer equipment are separate system components.
AC Output Ratings
| Continuous output power |
1200 W |
| Default AC output voltage |
230 VAC |
| Selectable AC output voltages |
200 / 220 / 230 / 240 VAC |
| Default output frequency |
50 Hz |
| Output frequency accuracy |
±0.1 Hz |
| Selectable output frequencies |
50 / 60 Hz |
| Over-rated output power |
1380 W |
| Over-rated duration |
3 min |
| Peak output power |
1800 W |
| Peak duration |
10 s |
| Surge output power |
2000 W |
| Surge duration |
30 AC cycles |
| Output waveform |
True sine wave; THD <3% |
| AC voltage regulation |
±3.0% at the rated output voltage |
The 3-minute, 10-second and 30-cycle values are separate short-duration capabilities, not continuous ratings. Apply the DC-input and ambient-temperature derating limits and the output connector current limit.
DC Input and Consumption
| Nominal DC input voltage |
12 VDC |
| Typical DC input range |
10–16.5 VDC |
| Typical DC input current |
120 A |
| Typical efficiency |
90% |
| Typical no-load consumption, saving mode |
1.2 W |
| Typical no-load consumption, non-saving mode |
25 W |
| Off-mode current draw |
≤1 mA |
| Internal pre-start / setup time |
8 s |
Saving mode is disabled by default. When enabled, the inverter automatically detects an AC output load of 10 W or less and enters saving mode. The DC input-current value describes battery-side input consumption, not an AC output-current rating.
Protection and Recovery
| Low DC input alarm |
11±0.3 VDC |
| Low DC input shutdown |
10±0.3 VDC |
| Low DC input restart |
12.5±0.3 VDC |
| High DC input alarm |
15.5±0.3 VDC |
| High DC input shutdown |
16.5±0.3 VDC |
| High DC input restart |
15±0.3 VDC |
| Internal fuse arrangement |
40 A × 4 |
| Overload protection, typical |
105–115% load for 180 s; 115–150% load for 10 s; output shutdown; re-power to recover |
| Overtemperature / AC output short circuit |
Output shutdown; re-power to recover |
| Reverse battery polarity |
Internal fuse opens; reverse polarity can damage the unit |
Observe the marked DC polarity before connection. Low-voltage shutdown helps limit battery over-discharge; coordinate it with the selected battery system.
DIP Settings and Remote Control
SW1 / SW2: OFF / OFF: 200 VAC; SW1 / SW2: OFF / ON: 220 VAC; SW1 / SW2: ON / OFF: 230 VAC.
SW1 / SW2: ON / ON: 240 VAC; SW3: ON: 50 Hz; OFF: 60 Hz; SW4: ON: saving mode; OFF: non-saving mode.
R.C pins 1 and 2: Open: inverter ON; short: inverter OFF; dry-contact / relay control; Remote port: RJ11, RS-232 communication; RJ11-to-DB9 signal mapping: Rx: RJ11 pin 2 ↔ DB9 pin 3; GND: RJ11 pin 3 ↔ DB9 pin 5; Tx: RJ11 pin 4 ↔ DB9 pin 2.
The RS-232 connection permits a computer or compatible remote controller to read internal data from a single inverter. Use the separately ordered RJ11-RS232 communication cable.
Front-Panel Indication
Status LED: flashing green indicates system check; steady green indicates normal inverter operation; steady orange indicates remote OFF; flashing orange indicates saving mode; red indicates an abnormal condition.
DC input LED for this 12 V model: green at 12.5–15.5 VDC; orange at 11–12.5 VDC; red at <11 or >15.5 VDC. Load LED: green below 40%, orange from 40% to 80%, red above 80% load.
Fault indication combinations: steady-red Status with DC-input LED off and flashing-red Load indicates overload or AC output short circuit; steady-red Status with flashing-red DC-input and Load off indicates abnormal DC voltage; steady-red Status with both DC-input and Load flashing red indicates overtemperature or fan lock; flashing-red Status with the other two LEDs off indicates inverter failure.
Cooling, Environment and Derating
| Operating ambient temperature |
−25 to +70°C; apply the derating curve |
| Cooling |
Temperature-controlled cooling fan |
| Operating humidity |
20–90% RH, non-condensing |
| Storage temperature / humidity |
−30 to +70°C / 10–95% RH, non-condensing |
| Vibration |
10–500 Hz, 3G; 10 min/cycle; 60 min along each X, Y and Z axis |
Horizontal-mounting thermal-derating reference points: -25°C: 100%, 35°C: 100%, 40°C: 85%, 60°C: 50%, 70°C: 30% of continuous rated load. Follow the full curve between the marked points.
DC-input derating: 50% load at 10 VDC, rising to 100% at 11 VDC; the graph retains 100% to 16.5 VDC. Apply this limit together with temperature derating.
Keep the ventilation openings clear. The mechanical drawing shows cooling airflow exiting at the DC-input end.
Mechanical Installation and Weight
| Dimensions (L × W × H) |
333 × 184 × 70 mm |
| Enclosure drawing |
Case No. 286A; drawing tolerance ±1 mm |
| Catalogue packing reference per unit |
3300 g |
This catalogue packing reference per unit is not a measured net weight or a shipping-parcel weight.
The drawing shows a 173 mm body width within the 184 mm overall mounting width. Longitudinal mounting references include 220, 200, 180 mm; follow the mechanical drawing for their exact datums and slot locations.
Connect DC cables to the marked − and + terminals and use the chassis bonding lug as required by the installation instructions. Keep mounting and wiring clear of the fan outlets. The DC-terminal projection is separately marked 20.9 mm on the drawing.
Remote Connections and Accessories
| R.C connector reference |
JST B-XH or equivalent; printed connector-family reference |
| R.C mating housing |
JST XHP or equivalent; select the matching two-circuit housing |
| R.C contact reference |
JST SXH-001T or equivalent; confirm the complete contact ordering suffix for the wire assembly |
| Remote controller options |
IRC1, IRC2, IRC3; separately ordered monitoring/control units |
| Communication cable |
RJ11-RS232; optional, separately ordered; catalogue quantity: 1 |
| Carry-handle option |
Carry Handle; optional, separately ordered |
IRC1, IRC2 and IRC3 decode inverter RS-232 data for monitoring and control. Available control functions depend on the connected inverter model; solar, charge and bypass symbols on a controller do not add those power-conversion functions to the inverter.
The Carry Handle accessory list contains one 180 × 27 × 10 mm handle, four foot pads and two mounting screws. Follow its installation drawing; the M4*2 callout accompanies the two screws and does not specify a 2 mm screw length.
Safety, EMC and Reliability
CB IEC 62368-1, DEKRA EN 62368-1, E13, EAC TP TC 004, CE and UKCA are shown for this output configuration.
Dielectric withstand: DC input to AC output 3.0 kVAC; AC output to FG 1.5 kVAC.
Radiated emissions: BS EN/EN 55032 (CISPR 32) Class A for this 200–240 VAC output model.
The specification lists BS EN/EN 55024 and EN 55035 immunity, with EN 61000-4-2 ESD at 8 kV air (Level 3) / 4 kV contact (Level 2), EN 61000-4-3 radiated immunity at 3 V/m (Level 2), and EN 61000-4-8 magnetic-field immunity at 1 A/m (Level 1). Final equipment must be checked for system EMC compliance.
MTBF: 596.7k hours minimum, Telcordia TR/SR-332; 62.0k hours minimum, MIL-HDBK-217F at 25°C. Features include MCU digital control, conformal coating and a three-year manufacturer catalogue warranty.
Test Conditions and Typical Applications
Efficiency, AC regulation and THD are measured with a 900 W linear load at 12.5 / 25 / 50 VDC input for the 12 / 24 / 48 V models respectively. Other unspecified parameters are measured at rated load, 25°C ambient and factory settings.
Typical applications include home and office appliances, power tools, portable equipment, vehicles, yachts, telecommunications and off-grid solar systems with a suitable battery bank. The application drawings use a separate PB, NPB or NPP AC/DC charger where utility or shore charging is required; the inverter itself is not the charger or an automatic bypass unit.
