What to do if PowerTech Controller shows error E4?
If the PowerTech Controller displays error E4, it indicates a load overcurrent or short circuit protection issue. The suggested solution is to turn on the load after eliminating the error.
Why does my PowerTech MP3743 Controller display error E7?
The PowerTech Controller displays error E7 due to over-temperature protection. Charging will stop when the heat sink temperature reaches 90°C. Charging will resume when the temperature decreases to 60°C.
What causes error E5 on PowerTech MP3743?
Error E5 on the PowerTech Controller is caused by overvoltage, which means the battery is either damaged or the battery voltage exceeds 15/31V.
What does error E3 mean on PowerTech MP3743?
Error E3 on the PowerTech Controller indicates an overcurrent protection issue. This means the circuit has a constant current and the machine may be damaged if there is an error.
What does error E6 mean on my PowerTech MP3743 Controller?
Error E6 on the PowerTech Controller means there is PV (solar) input overvoltage protection activated because the PV voltage is greater than 100V.
Why does PowerTech MP3743 Controller show error E8?
Error E8 on the PowerTech Controller is due to PV reverse connection. The suggested solution is to correct the connection.
What does error E2 mean on PowerTech MP3743 Controller?
Error E2 on the PowerTech Controller is due to an open circuit protection on RY not connected, or the voltage is less than 8V/18V.
How to fix E1 error on PowerTech MP3743 Controller?
Error E1 on the PowerTech Controller can be resolved by reversing the connection.
Warns against child misuse and stresses using approved accessories for safety.
Details voltage limits for batteries and PV input to prevent device damage.
Advises on heat sink safety, temperature limits, and avoiding wet environments.
Explains the function of buttons (UP, DOWN, MENU, ENTER) and LED indicators (Green, Red).
Covers the USB output ports and the LCD screen's role in displaying information.
Covers maximum PV voltage, anti-reverse, and voltage ranges for 12/24V battery input.
Explains automatic battery type detection, max charging current, and anti-reverse battery connection.
Details load output current, overcurrent, short circuit, and voltage protection features.
Describes the device's response to high temperatures, including load reduction and charging stops.
Describes automatic float voltage adjustment based on ambient temperature for specific battery types.
Explains the WIFI functionality, mobile app control, and data monitoring features.
Details the USB input protection against voltage fluctuations and the USB output specifications.
Explains icons for solar input, charging status, WIFI, remote control, and settings.
Details icons for battery level, load status, connector mapping, and battery type identification.
Describes icons for protection warnings, load timing clocks, and day/night indicators.
Explains the numerical display for parameters like battery voltage, load, and PV voltage.
Details switching display modes and entering the parameter setting interface.
Lists options for battery type, WIFI, load protection, and time settings.
Explains how to navigate and confirm settings within the parameter interface.
Describes using UP/DOWN buttons for adjusting values and switching displays.
Details using the ENTER button to modify parameters or control load ON/OFF.
Specifies recommended wire gauges (AWG) for the battery output line.
Provides recommended wire gauges (AWG) for the PV input line.
Lists maximum PV voltage, MPPT voltage, input power, and current ratings.
Details battery voltage, capacity, output current, and charging voltage.
Specifies load output voltage/current and USB output voltage/current/ports.
Lists standby current consumption and summarizes protective functions.
Provides dimensions, weight, operating temperature, cooling, and protection level.
Details error codes (E1-E8) and their corresponding fault descriptions.
Explains low-voltage and over-voltage protection fault displays.
Provides guidance on resolving faults and seeking service if issues persist.
The Powertech MP3743 is a 12V/24V 30A MPPT Solar Charge Controller designed for use with Lithium or SLA batteries. This device efficiently manages power flow from solar panels to batteries and connected loads, incorporating various protective features and user-friendly controls.
The core function of the MP3743 is to act as an MPPT (Maximum Power Point Tracking) solar charge controller. It optimizes the power output from solar panels to efficiently charge 12V or 24V batteries. The controller automatically identifies the battery voltage (12V/24V) and provides a maximum charging current of 30A. It supports different battery types, including STD (Standard), LI (Lithium), and AGM, with specific constant voltage charging settings for each: STD: 14.4V/28.8V, LI: 14.5V, and AGM: 14.6V/29.2V.
The device includes a load output function, which is OFF by default. It can deliver a rated maximum output current of 30A (12/24V) or 35A. This output is protected against overcurrent (>35A) and short circuits (E4 alarm). It also features load output over/undervoltage protection with adjustable recovery voltages.
For user convenience, the MP3743 is equipped with two 5V 3A USB output ports, allowing for direct charging of small electronic devices.
The MP3743 features an LCD screen (8) for displaying various operational data such as battery voltage, load voltage, PV voltage, and time. It also shows icons for solar panel connection (A), charging current (B, 8 grids for 30A), MPPT status (C), WIFI status (D), remote control connection (E, optional), settings (F), battery level (F), load status (I), connection points (J), identified battery type (K), and protection status (L). Two load timing clocks (M, N) are also present.
Control is managed via four buttons: UP (1), Down (2), MENU (3), and Enter (4).
The LCD backlight automatically turns off after 1 minute of no button operation and reactivates with any button press.
The device supports an external temperature probe (9) for temperature compensation, especially for AGM/STD batteries. If not connected, it defaults to a temperature of ≥20°C±5°C.
The MP3743 may integrate a WIFI module (optional). If present, users can install a mobile APP to control the load switch and view real-time data like battery voltage and charging current. An RJ45 port (10) is reserved for connecting to a remote control board (optional).
The MP3743 includes several self-protection and error reporting features to aid in maintenance and troubleshooting. The red LED light (6) indicates errors: off when no error, long on for error alarm, and flashing for lithium battery 12V gear or other red light errors.
If an error occurs, the user should eliminate the fault according to the error code. If the device still does not respond after troubleshooting, it may be damaged and require after-sales service.
The device is designed for wall mounting, and it is recommended not to touch the heat sink during operation to avoid burns. It should not be used in environments exposed to rain.
General| Brand | PowerTech |
|---|---|
| Model | MP3743 |
| Category | Controller |
| Language | English |
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