NTS & NTU Series - User Manual - True Sine Wave Inverter

Q: How does the inverter adjust output settings?

Output voltage, frequency, and power saving mode are adjustable through the front panel DIP switch. The settings procedure is described in the “Explanation of settings” section.

Q: What safety guidance should be followed during installation and use?

The manual advises using batteries of the same brand and model in one bank, avoiding sparks or flames near batteries, ensuring fan airflow is not blocked with at least 15 cm clearance, and not opening the inverter case by yourself.

Sep 22, 2026

Upload by Lucas Martin

NTS/NTU series true sine wave inverters provide fully digital, high-reliability off-grid DC-AC power conversion with compact design, high efficiency up to 93%, and THD under 3%. Key functions include selectable AC voltage/frequency and power-saving mode via front DIP switch, peak load capability up to 1.7–2 times, and built-in protections for DC input and AC output. Integrated remote control and IRC1/2/3 monitoring, plus multiple safety certifications and 3-year warranty, support household, vehicles, yachts, and remote areas.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages36

Reading Time1 h 31 min

AccessFree to download

Safety Guidelines

Introduction

Model number

Features

Main specification

Safety Overview

Derating curve

Mechanical specification

Installation & Wiring

Precautions

System Block Diagram

Installation procedures

Cable selection

Battery selection

GFCI socket

User Interface Panel

AC panel

DC panel

LED indicator

Explanation of settings

Procedure of Setting

Function difference

IRC1/IRC2/IRC3 Remote control unit

RS-232/UART protocol

UPS mode

Protections and Failure

Protections

Failure Correction

Warranty

Environmental declaration

NTS & NTU Series User Manual True Sine Wave Inverter ‧High Reliable Inverter ‧ NTS/NTU series are MEAN WELL's new generation high-reliability offgrid DC-AC pure sine wave inverter s. The whole family has NTS-250P/400P, NTS-300/450/750/1200/1700/2200/3200, and NTU-1200/1700/2200/3200 series . The whole family of NTS/NTU are fully digital designed, with three major characteristics of miniaturization, high efficiency, and intelligence. The main features are, instantaneous peak load capacity which can reach up to 2 times of output wattage, as well as AC output voltage/frequency/power saving mode adjustment capability through the DIP switch of front panel (the idle standby consumption is 1.5W) . It’s efficiency reaches up to 93%, and it can be operated within temperature range from -25~+70℃ . Built-in remote control, able to monitor the battery voltage and the load status of the inverter through IRC1/2/3 . Not only intergrated multiple intelligent protections, but also passed safety regulations such as CB/DEKRA/E13/EAC/UL/RCM/FCC/CE/UKCA. Materials and components are strictly selected and 3-year warranty is provided. It is suitable for households, vehicles, yacht and remote areas without power grids. Common application such as, lighting, air conditioning, refrigerators, hair dryers, microwave ovens , computers, televisions, hand-held power tools, motor equipment, mobile AC power... etc. Index 1. Safety Guidelines 1 2. Introduction 2 2.1 Model number 2 2.2 Features 2 2.3 Main specification 3 2.4 Safety Overview 16 2.5 Derating curve 17 2.6 Mechanical specification 18 3.Installation & Wiring 24 3.1 Precautions 24 3.2 System Block Diagram 24 3.3 Installation procedures 25 3.4 Cable selection 25 3.5 Battery selection 26 3.6 GFCI socket 26 4.User Interface Panel 27 4.1 AC panel 27 4.2 DC panel 29 4.3 LED indicator 30 5. Explanation of settings 32 5.1 Procedure of Setting 32 Operating Mode, Output Voltage, Frequency, and power Saving Mode 5.2 Function difference 34 5.3 IRC1/IRC2/IRC3 Remote 34 control unit 5.4 RS-232/UART protocol 35 5. 5 UPS mode(only for 59 NTU series) 6. Protections and Failure 61 Correction 6.1 Protections 61 6.2 Failure Correction 62 7.Warranty 63 8. Environmental declaration 64 information 2026.03 Ver 12 1 1. Safety Guidelines 􀀂 Risk of electrical shock and energy hazard. All failures should be examined by the qualified technician. Please do not remove the case of the inverter by yourself. 􀀂 Please do not install the inverter in places with high moisture or near water. 􀀂 Please do not install the inverter in places with high ambient temperature or under direct sunlight. 􀀂 Please only connect batteries with the same brand and model number in one battery bank. Using batteries from different manufacturers or different capacity is strictly prohibited! 􀀂 Never allow a spark or flame in the vicinity of the batteries because they may ignite explosive gases during normal operation. 􀀂 Make sure the air flow from the fan is not obstructed at both sides (front and back) of the inverter. (Please allow at least 15cm of space) 􀀂 Please do not stack any object on the inverter. 􀀂 Please do not turn on the inverter before start the engine if inverter connected to vehicle's battery directly. 􀀂 Branch rated over current protection for the AC output circuit is to be provided at the time of installation. 􀀂 Risque de choc électrique et danger d'électrocution. Toutes les pannes doivent être examinées par un technicien qualifié . Veuillez ne pas retirer vous-même leboîtier de l'onduleur. 􀀂 N'installez pas l'onduleur dans des endroits très humides ou à proximité d'eau. 􀀂 N'installez l'onduleur dans des endroits où la température ambiante est élevée ou sous la lumière directe du soleil. 􀀂 Veuillez ne insérer que des batteries de la même marque et du même modèledans un seul banc de batteries. L'utilisation de batteries de fabricants différ

FAQs

What are the key features of the NTS/NTU series inverter?

The series uses full digital design and outputs true sine wave with THD < 3%. It supports selectable AC voltage/frequency and power saving mode, and includes multiple intelligent protections for DC input and AC output.

How does the inverter adjust output settings?

Output voltage, frequency, and power saving mode are adjustable through the front panel DIP switch. The settings procedure is described in the “Explanation of settings” section.

What safety guidance should be followed during installation and use?

The manual advises using batteries of the same brand and model in one bank, avoiding sparks or flames near batteries, ensuring fan airflow is not blocked with at least 15 cm clearance, and not opening the inverter case by yourself.

Sep 22, 2026

Upload by Lucas Martin