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Summary of Contents for PowerTech MP3749
- Page 1 MP3749 MPPT Solar Charge Controller for Lithium or SLA Batteries MP3749 Instruction Manual...
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Page 3: Table Of Contents
Table of Contents Important Safety Instructions Quick Start Guide General Information Overview Characteristics Naming rules Installation Attention Requirements for the PV array Wire size Dry contact instruction Mounting Operation Indicator Buttons LCD Display Settings Additional Info Protection Troubleshooting Maintenance Specifications Dimensions... -
Page 4: Important Safety Instructions
IMPORTANT SAFETY INSTRUCTIONS: Please reserve this manual for future review. This manual contains all safety, installation, and operation instructions for the Tracer-AN series MPPT solar controller (“controller” referred to in this manual). • Read all the instructions and warnings carefully in the manual before installation. -
Page 5: 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 6: General Information
GENERAL INFORMATION: OVERVIEW Based on multiphase synchronous rectification technology(MSRT) and advanced MPPT control algorithm, adopt dual-core processor and co- negative design, Tracer-AN series controllers own the fast response characteristics, high reliability, and industrial standards. MSRT guarantees a high conversion efficiency in any charging power, which sharply improves the solar system’s energy efficiency. - Page 7 GENERAL INFORMATION: • Up to 6 controllers connection in parallel to expand the system • Load dry contact to control the external load switch • To set the first and the second disconnection voltage of load by the software • Auto-control of utility and generator dry contact design to compose a hybrid power system easily •...
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Page 8: Characteristics
GENERAL INFORMATION: CHARACTERISTICS Figure 1 Product Characteristics Charging indicator (Utility/Generator) dry contact ON interface SELECT button RBVS interface4 External fuse (Load) dry contact interface Grounding terminal (Utility/Generator) dry contact Screw hole (M4) OFF interface (PV reverse polarity) alarm PV terminals indicator Battery terminals Generator/Load) dry contact... -
Page 9: Naming Rules
GENERAL INFORMATION: Set the (Generator/Load) dry contact enable switch to ON, the (Load) dry contact is enabled; while it is disabled when the switch is set to OFF. Connect an RTS (Remote Temperature Sensor) to remotely detect the battery temperature. The sampling distance is no longer than 20m. Suppose the temperature sensor is a short circuit or damaged. -
Page 10: 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 11 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 12: Wire Size
Max. PV open Model current power power circuit voltage 100V (lowest 750W/12V 1125W/12V MP3749 temperature) 1500W/24V 2250W/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 13: Dry Contact Instruction
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 14 INSTALLATION: (Load) dry contact : The (Load) dry contact controls the load ❷ second ≤ V disconnection. : The (Load) dry contact controls the load ❷ second ≤ V connection. The Battery Control Voltage Parameters refer to Operation - Settings. CAUTION When the system is power off, the (Utility/Generator) dry contact OFF interface is closed.
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Page 15: Mounting
INSTALLATION: MOUNTING • Risk of explosion! Never install the controller in a sealed enclose with flooded batteries! Do not install the controller in a confined area where battery gas can accumulate. • Risk of electric shock! When wiring the solar modules, the PV array can produce a high open-circuit voltage, so turn off the breaker before wiring and be careful when wiring. - Page 16 INSTALLATION: Step 2: Remove the terminal protective cover Step 3: Connect the battery❶ (Left) and PV❷ (Right) Disconnect the system in reverse order. IMPORTANT Controllers have no battery reverse protection. Do not reverse the battery during the wiring. Otherwise, the controller may be damaged.
- Page 17 INSTALLATION: Single Controller: Connection in Parallel:...
- Page 18 INSTALLATION: Step 4: Grounding The MP3749 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: INDICATOR Indicator Colour Status Instruction PV connection is normal, but the Green ON solid voltage is low and not charging. No PV voltage(night time) or PV Green connection fault Green Slowly flashing (1Hz) PV is charging Green Fast flashing(4Hz) PV over voltage The fault indicator refers to LCD Display Section IMPORTANT... -
Page 20: Lcd Display
OPERATION: LCD DISPLAY 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) dry contact connected Load (Load) dry contact disconnected Browse interface When no operation, the display interface will be an automatic cycle except for the load time1 and load time 2 interface. -
Page 21: Settings
OPERATION: LCD DISPLAY Status Description Faults Charging Status Symbol Instruction Indicator indicator Battery level shows Battery over Red ON empty, battery frame discharged solid blink, fault icon blink. Battery level shows full, Battery over Red Slow battery frame blink, fault voltage flashing icon blink. - Page 22 OPERATION: Battery type Supported Battery Types Sealed(default) Lead-acid battery Flooded User LiFePO4(4S/12V;8S/24V;16S/48V) Lithium battery Li(NiCoMn)O2 (3S/12V;6S/24V;12S/48V) User Setting the battery type via the LCD ① Sealed ② Gel ③ Flooded ④ User (Apply to (Default) “MT50” and “PC software “Solar Station Monitor”) Operation: On the battery voltage 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: 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 25 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 26 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 ≥...
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Page 27: Additional Info
ADDITIONAL INFO: PROTECTION • Controllers have no battery reverse protection. Do not reverse the battery during the wiring. Otherwise, the controller may be damaged. WARNING Protection Instruction PV current/ When the PV array's actual charging current or power exceeds power-limiting the controller's rated charging current or power, the controller protection charges the battery as per the rated current or power. - Page 28 ADDITIONAL INFO: When the temperature detected by the optional temperature sensor is lower than the Low Temperature Protection Lithium battery Threshold(LTPT), the controller stops charging and discharging low temperature automatically. When the detected temperature is higher than the protection LTPT, the controller resumes work automatically. (The LTPT is 0 °C by default and can be set within the range of 10 ~ -40 °C.
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Page 29: 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 The wire connection is correct;... -
Page 30: 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 31: Specifications
SPECIFICATIONS: Model: MP3749 Electrical Parameters System rated voltage 12/24/36/48VDC or Auto 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 charging power 750W/12V, 1500W/24V Max. - Page 32 SPECIFICATIONS: Model: MP3749 Environmental Parameters Working environment temperature -25°C ~ +60°C (when the working temperature reaches 45°C or above, the charging power and load power will be reduced appropriately; working of full load is not supported.) LCD temperature range -20°C ~ +70°C Storage temperature -30°C ~ +85°C...
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Page 33: Dimensions
SPECIFICATIONS: DIMENSIONS... - Page 36 Distributed by: Electus Distribution Pty. Ltd. 320 Victoria Rd, Rydalmere NSW 2116 Australia www.electusdistribution.com.au Made in China...
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