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Summary of Contents for PowerTech MP3768
- Page 1 MP3768 MPPT Solar Charge Controller for Lithium or SLA Batteries Instruction Manual...
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Page 2: Table Of Contents
Table of Contents Important Safety Instructions Quick Start Guide General Information Overview Characteristics Installation Attention Requirements for the PV array Wire size Mounting Operation Buttons Interface Settings Additional Info Protection Troubleshooting Maintenance Specifications... -
Page 3: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS: Please reserve this manual for future review. This manual contains all safety, installation, and operation instructions for the MPPT solar controller (“controller” referred to in this manual). • Read all the instructions and warnings carefully in the manual before installation. -
Page 4: Quick Start Guide
QUICK START GUIDE: For best results, use the thickest cable you can afford that will fit in the connectors. Make sure all screwed connections are as tight as possible. Panel (PV) voltage must be higher than battery voltage. A 12V battery is OK with a 12V or higher solar (PV) array, a 24V battery will only work with a 24V or higher solar (PV) array. -
Page 5: General Information
GENERAL INFORMATION: OVERVIEW Adopting the advanced MPPT control algorithm, the solar controller can minimize the maximum power point loss rate and loss time. It makes this product tracks the PV array's maximum power point and obtains maximum energy under any situation. Compared with the PWM charging method, MPPT solar controllers can increase the energy utilization ratio by 10%-30%. - Page 6 GENERAL INFORMATION: • A power protection chip, which can provide 5VDC/200mA power and over current, short circuit protections, is adopted by the communication interface • Support monitoring and setting the parameters via the APP or PC software • Comprehensive electronic protection For the BCV, FCV, LVD, and LVR, users can modify them on the local controller when the battery type is "USE."...
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Page 7: Characteristics
GENERAL INFORMATION: CHARACTERISTICS Figure 1 Product Characteristics SELECT button RS485 port Mounting Hole Φ5mm RTS interface ENTER button PV terminals Battery terminals Load terminals Suppose the remote temperature sensor is not connected to the controller or damaged. In that case, the controller will charge or discharge the battery at the default temperature setting of 25°C (no temperature compensation). - Page 8 GENERAL INFORMATION: MAXIMUM POWER POINT TRACKING TECHNOLOGY Due to the nonlinear characteristics of the solar array, there is a maximum energy output point (Max Power Point) on its curve. Traditional controllers, equipped with switch charging technology and PWM charging technology, can't charge the battery at the maximum power point and cannot obtain the maximum energy available from the PV array.
- Page 9 GENERAL INFORMATION: According to the test, the MPPT controller can raise 20%-30% efficiency compared to the PWM controller. (Specified value may be fluctuant due to the influence of the circumstance and energy loss.) Figure 1-2 Maximum Power Point Tracking Technology In actual application, as shading from cloud, tree, and snow, the panel may appear Multi-MPP.
- Page 10 GENERAL INFORMATION: Suppose the program works improperly after appearing Multi-MPP. In that case, the system will not work on the real max power point, which may waste most solar energy resources and seriously affect the system's normal operation. The typical MPPT algorithm, designed by our company, can track the real MPP quickly and accurately.
- Page 11 GENERAL INFORMATION: B) Constant Charging When the battery voltage reaches the constant voltage set point, the controller will start to operate in constant charging mode. The MPPT charging stops during this process, and the charging current will drop gradually at the same time. Constant charging has two stages, namely, equalize charging and boost charging.
- Page 12 GENERAL INFORMATION: • Due to the installation environment or load work , t he system may not stabilize the battery voltage at a constant voltage. The controller will accumulate the time when the battery voltage is equal to the set value. When the accumulative time is equal to 3 hours, the system will IMPORTANT automatically switch to float charging.
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Page 13: Installation
INSTALLATION: ATTENTION • Be very careful when installing the batteries. Please wear eye protection when installing the open-type lead-acid battery and rinse with clean water in time for battery acid contact. • Keep the battery away from any metal objects, which may cause a battery short circuit. - Page 14 INSTALLATION: The above parameters are calculated under standard test conditions (STC (Standard Test Condition): Module Temperature 25°C, Air Mass 1.5, Irradiance 1000W/m2.) IMPORTANT (2) Max. PV Array Power This MPPT controller has the function of charging current/power-limiting. During the charging process, when the actual charging current or charging power exceeds the rated charging current or charging power, the controller automatically limits the current or power.
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Page 15: Wire Size
Max. PV open Model current power power circuit voltage 100V (lowest 390W/12V 580W/12V MP3768 temperature) 780W/24V 1170W/24V 92V (25°C) WIRE SIZE The wiring and installation methods must conform to the national and local electrical code requirements. • PV wire size The PV array’s output current varies with its size, connection method,... -
Page 16: Mounting
INSTALLATION: • The wire size is only for reference. Suppose a long-distance exists between the PV array and the controller or between the controller and the battery. In that case, larger wires shall be used to reduce the voltage drop and improve the system performance. - Page 17 INSTALLATION: Step 2: Connect the system in the order of battery - load - PV array following Figure 2-2, " Schematic Wiring Diagram," and disconnect the system in the reverse order. Figure 2-2 Wiring Diagram • Please do not close the circuit breaker or fuse during the wiring and ensure that the leads of "+"...
- Page 18 INSTALLATION: Step 3: Grounding The MP3768 uses a common-negative controller. Negative terminals of the PV array, the battery can be grounded simultaneously, or any terminal is grounded. However, according to the practical application, the PV array’s negative terminals, battery, and load can also be ungrounded.
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Page 19: Operation
OPERATION: BUTTONS Modes Note It can turn the load On/Off via the "ENTER" button in manual Load ON/OFF load mode. Clear fault Press the "ENTER" button Browsing mode Short press the "SELECT" button Long-press the "ENTER" button to enter the Setting mode, and short press the "SELECT"... -
Page 20: Interface
OPERATION: INTERFACE Status Description Name Symbol Status Night PV array No charge Charging PV array's voltage, current, and generate energy Battery capacity, In Charging Battery Battery Voltage, Current, Temperature Battery Type Load ON Load Load OFF LOAD Current/Consumed energy/Load mode Error Codes Status Symbol... - Page 21 OPERATION: Browse Interface Press the SELECT button to cycle display the following interfaces.
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Page 22: Settings
OPERATION: SETTINGS Clear the generated energy In the PV power interface, long press the “ENTER” button until the value flashes. Then it enters the reset mode; press the “ENTER” button again to confirm and reset. Switch the battery temperature unit In the battery temperature interface, long press the “ENTER”... - Page 23 OPERATION: Setting the battery type via the PC software or APP software • PC software Connect the controller and the PC through the USB to the RS485 converter, and set the controller’s parameters through the PC software. Please refer to the cloud platform manual for the specific setting.
- Page 24 OPERATION: Parameters Default Range Operation Steps Under the " USE " interface, press the ENTER button to enter the “SYS” interface. Press the ENTER button again to display the current “SYS” value. SYS* 12VDC 12/24 VDC Press the SELECT button to modify the parameter.
- Page 25 OPERATION: Battery voltage control parameters ⯁ Lead-acid Battery Parameters The parameters are measured in the condition of 12V/25°C. Please double the values in the 24V system and quadruple the values in the 48V system. Voltage control Sealed User parameters Over voltage disconnect 16.0V 16.0V 16.0V...
- Page 26 OPERATION: Over Voltage Disconnect Voltage > Charging Limit Voltage ≥ Equalize Charging Voltage ≥ Boost Charging Voltage ≥ Float Charging Voltage > Boost Reconnect Charging Voltage. Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage C. Low Voltage Reconnect Voltage > Low Voltage Disconnect Voltage ≥ Discharging Limit Voltage.
- Page 27 OPERATION: • The following rules must be observed when modifying the parameter values in User for a lithium battery. Over Voltage Disconnect Voltage > Over Charging Protection Voltage(Protection Circuit Modules(BMS))+0.2V; Over Voltage Disconnect Voltage > Over Voltage Reconnect Voltage = Charging Limit Voltage ≥...
- Page 28 OPERATION: • Load Mode Setting Operating Steps: Under load mode setting interface, press SET button and hold on 5s till the number begin flashing, then press MENU button to set the parameter, press SET button to confirm. Timer 1 Timer 2 Light ON/OFF Disabled Load will be on for 1 hour...
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Page 29: Additional Info
ADDITIONAL INFO: PROTECTION Protection Instruction When the PV array's actual charging current or power exceeds PV over current the controller's rated charging current or power, the controller charges the battery as per the rated current or power. When not in the PV charging state, the controller will not be damaged in the case of short-circuiting in the PV array. - Page 30 ADDITIONAL INFO: When a short circuit occurs on the load side (which is 4 times higher than the rated load current), the controller automatically cuts off the output. The output still attempts to resume five times Load short automatically (delay 5 seconds, 10 seconds, 15 seconds, 20 circuit seconds, 25 seconds).
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Page 31: Troubleshooting
ADDITIONAL INFO: TROUBLESHOOTING Issue Fault Solution Charging LED is OFF during Confirm whether the PV array daytime when sunshine falls on connection of the PV array is open-circuit PV array properly correct and tight The battery Please check the voltage of The wire connection is correct;... -
Page 32: Maintenance
ADDITIONAL INFO: MAINTENANCE The following inspections and maintenance tasks are recommended at least two times per year for the best performance. • Make sure no block on airflow around the controller. Clear up any dirt and fragments on the radiator. •... -
Page 33: Specifications
SPECIFICATIONS: Model: MP3768 Electrical Parameters 12/24VDC or Auto ① System rated voltage Controller working voltage range 8V~32V Lead-acid battery type Sealed (default), GEL, FLD, and user- defined. Lithium battery type LiFePO4/ Li(NiCoMn)O2/ User Battery fuse 80A/ 58V Rated charging current Rated discharge current Max. - Page 34 Distributed by: Electus Distribution Pty. Ltd. 320 Victoria Rd, Rydalmere NSW 2116 Australia www.electusdistribution.com.au Made in China...
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Questions and answers
Is the MP 3768 power tec MPPT controller lithium compatible if so what do you set it on Thank you
Yes, the PowerTech MP3768 MPPT controller is compatible with lithium batteries. It supports both lead acid (sealed, gel, flooded) and lithium battery banks between 8V to 32V. The controller features bulk, constant, and float charge stages for efficient and safe charging.
The exact settings to use depend on the battery specifications. When using lithium batteries, ensure the controller is configured to the lithium battery type via the settings interface. Also, connect the remote temperature sensor near the battery for accurate temperature compensation, if applicable.
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