POWERTECH MP3743 MPPT Solar Charge Controller
Instruction Manual for Lithium or SLA Batteries The POWERTECH MP3743 MPPT Solar Charge Controller is a rectangular device with a prominent LCD screen and control buttons on the top surface. The front panel features various input/output terminals and an Ethernet socket. Cooling fins are integrated into the bottom casing. The LCD screen provides real-time information and status updates. It displays various icons and numerical readings related to solar input, battery status, load operation, and system settings. To access the settings menu, tap the Menu button when the display is off to turn it on. Press and hold the Menu button to enter the settings menu. Tap the Menu button again to cycle through each setting in the following order. Use the Enter button to confirm or save a setting. With the unit turned off, press and hold the Menu button, then power up the controller via the battery input. The screen will display "FFFF" to indicate that all settings have been factory reset. Distributed by: Electus Distribution Pty. Ltd. Website: www.electusdistribution.com.au Made in ChinaBox Contents
Product Diagram
Label Component 1 LCD Screen 2 Green Indicator LED 3 Red Indicator LED 4 External Temperature Probe Port 5 Solar Positive Input Terminal 6 Solar Negative Input Terminal 7 Battery Positive Input Terminal 8 Battery Negative Input Terminal 9 Load Positive Output Terminal 10 Load Negative Output Terminal 11 Up Button 12 Menu Button 13 Enter Button 14 USB Outputs 15 Down Button 16 Ethernet Socket LCD Screen Indicators
Label Indicator Name Description A Solar Input Indicator Indicates solar panel input status. B Solar Current Indicator Displays the current generated by the solar panels. C MPPT Charging Indicator Shows when the Maximum Power Point Tracking (MPPT) charging is active. D WiFi Indicator Indicates the status of the WiFi connection. E Remote Control Indicator Shows if remote control functionality is active. F Setting Mode Indicator Indicates when the device is in a settings adjustment mode. G Load Switch Indicator Shows the status of the load output switch. H Battery Capacity Indicator Displays the current charge level or capacity of the battery. I Load Indicator Indicates if the load is currently drawing power. J Display Indicator for Current Reading Specifies what current value is being displayed (e.g., PV current, battery current, load current). K Battery Type (12/24V) Shows the configured battery voltage (12V or 24V) and type (STD, Lithium, AGM). L Protection Icon Displays an icon indicating a fault or protection mode is active. Refer to fault codes for details. M Timing Clock Represents a clock function, possibly for scheduling or timing events. N Timing Clock Another timing clock display. O Day/Night Indicator Indicates day or night status, often determined by PV input. P Reading Display with Unit Type The main display area showing numerical values with their respective units (e.g., Volts, Amps, Watts, kWh, VA%). Basic Functions
Settings Menu
# Menu Item Options 1 Battery Type Standard (STD) / Lithium (L) / AGM (A) 2 WiFi On / Off 3 Load Voltage Protection Cut Off 10 – 11.5V (12V) – Default 10V
20 – 23V (24V) – Default 20V4 Load Under Voltage Recovery 12 – 13V (12V) – Default 12.5V
24 – 26V (24V) – Default 25V5 24 Mode On / Off 6 Time Hours / Minutes 7 Load Timer On / Off (When turned on, the next setting is used to set the Load on time) Factory Reset
Fault Codes
Code Description E1 Battery has been installed with the polarity reversed. E2 Battery is not currently connected, or is under the low voltage cut off. E3 Battery over current protection enabled. If the issue persists, the controller may be faulty. E4 Load over current / short circuit protection. Turn off the machine for 10 seconds to reset. E5 Battery over voltage protection. E6 Solar input over voltage protection. E7 Over temperature protection. Charging will restart once the temperature is under 60°C. E8 Solar input has been installed with the polarity reversed. Specifications
SOLAR
Maximum PV Open Circuit Voltage: 100V MPPT Voltage: 16 – 80VDC Maximum PV Input Power: 450W (12VDC) / 900W (24VDC) Maximum MPPT Current: 30A DC OUTPUT
Battery Voltage: 12/24VDC Output Current: 30A USB OUTPUT
Output Voltage: 5VDC Number of USB Ports: 2 Maximum Output Current: 3.4A STANDBY CURRENT
MPPT Charger Only: 60mA MPPT Charger & WiFi: 160mA PROTECTIVE FUNCTIONS
High / Low Voltage Protection: High: 15V (12V) / 31V (24V)
Low: 8V (12VDC) / 18V (24VDC)Reverse Polarity Protection: Yes Temperature Cut Off: 90°C GENERAL
Dimensions: 238 x 177 x 63mm Weight: 1.5kg Operating Temperature: -10°C – 40°C Cooling method: Heatsink Insulation Class: Class 1 IP Rating: IP30 Distributed By
320 Victoria Rd, Rydalmere NSW 2116 Australia
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