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Page 39

Appendix 4. Solar Controller Monitor for MP3741

(RS-485/USB) using USB Cable adaptor (MP3747)

Allows reading and writing data using a PC.
Requires Communication

cable CC-USB-

RS485-150U USB to PC RS485 for MP3741
Solar Charge Controller.

The controller has a proprietary RJ45
connector with a digital output of the system
values using RS-485 protocol. The
communication cable together with the PC
Software allows it to connect to a Windows
PC and to read and to write the data from/to
the MP3741 controller.

Product monitors the following values of battery voltage and current:

• Battery Voltage
• Solar Module Voltage
• Load Current
• Over Discharge Voltage
• Full Voltage
• Temperature
• Charging Current

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Содержание MP3741

Страница 1: ...Page 1 MP3741 MPPT Solar Charge Controller User Manual ...

Страница 2: ...tempt to repair the controller The controller must be mounted indoors or outdoors in a waterproof enclosure Prevent exposure to the elements and do not allow water to enter the controller Install the controller in a well ventilated place the controller s heat sink may become very hot during operation Always Install appropriate external fuses breakers Ensure all connections to Solar panels and batt...

Страница 3: ...ments 11 2 3 Wire Size 11 2 4 Mounting 12 3 Operation 13 3 1 Button Function 14 3 2 LCD Display 14 3 3 Parameters setting 16 3 4 Battery type 19 4 Protection systems Troubleshooting and Maintenance 20 4 1 Protection 20 4 2 Troubleshooting 22 4 3 Maintenance 23 5 Technical Specifications 24 Appendix 1 Conversion Efficiency Curves 25 Appendix 2 Dimensions 26 Appendix 3 How to set battery parameters ...

Страница 4: ... any location with online access Features Automatic current limit function of Solar input power preventing overload Wide MPPT operating voltage range 12 24VDC automatic battery voltage detection LCD panel display dynamically displays operating data and working conditions Multiple load control modes Manual mode Light ON OFF Light by Timer and test mode 3 preprogramed Lead Acid battery options Seale...

Страница 5: ...mperature Sensor Socket Enter Button PV Solar Power Input Terminals LCD Display Battery Terminals Explanations Connection for an RTS Remote Temperature Sensor to remotely detect battery temperature RTS not supplied but can be ordered Monitor controller by PC remote meter MT50 or APP and update controller software via RS485 RJ45 interface extra hardware is required ...

Страница 6: ...ing operation which is useful for bulk parameter setting for special projects 5 USB to RS 485 converter MP3747 sold separately USB to RS 485 converter is used to monitor each controller on the network using Solar Station PC software The length of cable is 1 5m Connects to the RS 485 Port on the controller See Appendix 3 4 Setting parameters using external controllers 1 4 Maximum Power Point Tracki...

Страница 7: ...ests the MPPT controller can improve efficiency by about 20 30 compared to the PWM controller Actual result may vary due to the influence of cloud temperature and other ambient circumstances Figure 1 2 Maximum Power Point Curve In real world applications such as shading from clouds trees or snow the panel may appear Multi MPP but in actually there is only one real Maximum Power Point As the below ...

Страница 8: ...ve A Bulk Charging In this stage the battery voltage has not yet reached constant voltage Equalize or Boost Voltage the controller operates in constant current mode delivering its maximum current to the batteries MPPT Charging B Constant Charging When the battery voltage reaches the constant voltage setpoint the controller will start to operate in constant charging mode no longer using the full MP...

Страница 9: ...used in the system Some types of batteries benefit from equalizing charge on a regular basis which is able to re mix the electrolyte and balance the battery voltage Equalizing is done by increasing the battery voltage higher than the standard float voltage which produces gas bubbles from the battery electrolyte causing the liquid to re circulate The controller will equalize the battery on 28th of ...

Страница 10: ...ase of battery acid leakage or spillage The controller comes pre set for Gel Sealed or Flooded batteries other kinds please refer to the battery manufacturer Keep metal objects away from the battery terminals which may cause short circuit of the battery The battery may emit explosive gases during charging ensure sure ventilation is adequate Never install the controller in a fully sealed enclosure ...

Страница 11: ...s are exceeded You should always measure the open circuit Panel voltage in bright sun before connecting anything 2 3 Wire Size Model MP3741 Rated Charge Current 20A Rated Charge Power 12V 260W 24V 520W Max Solar Array Power 12V 780W 24V 1560W Max Solar open circuit voltage 92V At 25 C 100V At 25 C Recommended minimum wire size Solar to Controller 6mm2 10AWG Controller to Battery 6mm2 10AWG Battery...

Страница 12: ...ooded batteries Do not install in a confined area where battery gas can accumulate WARNING Risk of electric shock Exercise caution when handling solar wiring The solar array can produce open circuit voltages in excess of 100V when in bright sunlight With wet skin this can result in a severe shock All fitting of Solar connectors should ideally be done either out of the sun or with the solar panels ...

Страница 13: ... to battery as possible The suggested distance is within 150mm 4 The MP3741 is a positive ground controller Any positive connection of solar load or battery can be earth grounded as required CAUTION If the Remote Temperature Sensor RTS is unplugged or not fitted the temperature of battery is assumed to be 25 ºC CAUTION If you want to use an inverter connect the inverter to the battery terminals ra...

Страница 14: ...r Battery level shows empty battery frame discharged blink fault icon blink Battery over Battery level shows full battery frame blink voltage fault icon blink Battery over Battery level shows current value battery temperature frame blink fault icon blink Load failure Load overload Load short circuit When load current reaches1 02 1 05 times 1 05 1 25 times 1 25 1 35 times and 1 35 1 5 times more th...

Страница 15: ...s not be displayed 2 Accumulative power zero clearing Under PV power interface press ENTER button and hold for 5s until the value starts to flash release then briefly press ENTER button again to clear the value 3 Setting temperature unit Under battery temperature interface press ENTER button and hold for 5s to switch ...

Страница 16: ...e on for 1 hour Load will be on for 1 hour since sunset before sunrise Load will be on for 2 hours Load will be on for 2 hours since sunset before sunrise Load will be on for 3 13 hours Load will be on for 3 13 since sunset hours before sunrise Load will be on for 14 hours Load will be on for 14 since sunset hours before sunrise Load will be on for 15 hours Load will be on for 15 since sunset hour...

Страница 17: ...and monitoring via WiFi from any location with Internet access See Appendix 1 2 Setting parameters using external controllers 2 Remote meter MT50 Use standard twisted net cable model CC RS485 RS485 200U MT 3 Super parameter programmer SPP 02 Use standard twisted net cable model CC RS485 RS485 200U One button easily configure and apply to batch setting 4 PC monitoring setting software Solar Station...

Страница 18: ...n below Pins Define 1 Power supply output 5V 2 Power supply output 5V 3 RS 485 B 4 RS 485 B 5 RS 485 A 6 RS 485 A 7 Ground 8 Ground WARNING The RJ45 interface is only allowed to connect with MP3746 or accessed by a qualified engineer The RJ45 interface Voltage is 5V and the current is 50mA 5 Mobile APP Use USB to RS485 converter cable CC USB RS485 150U and OTG cable OTG 12CM ...

Страница 19: ...Gel Flooded User Over Voltage Disconnect 16 0V 16 0V 16 0V 9 17V Voltage Charging Limit Voltage 15 0V 15 0V 15 0V 9 17V Over Voltage Reconnect 15 0V 15 0V 15 0V 9 17V Voltage Equalize Charging 14 6V 14 8V 9 17V Voltage Boost Charging Voltage 14 4V 14 2V 14 6V 9 17V Float Charging Voltage 13 8V 13 8V 13 8V 9 17V Boost Reconnect 13 2V 13 2V 13 2V 9 17V Charging Voltage Low Voltage Reconnect 12 6V 12...

Страница 20: ...t circuit occurs the controller will stop charging Clear it to resume normal operation Solar Array Reverse Polarity The controller is fully protected against reverse polarity no damage to the controller will result Correct the wiring to resume normal operation WARNING This only applies if the Panel voltage is within the acceptable open circuit voltage range Battery Reverse Polarity Fully protected...

Страница 21: ...the overload meaning it will tolerate short term overloads Load Current Response time in seconds 21A 50 25A 30 27A 10 30A 2 30 0 Controller Overheating If the temperature of the controller heat sinks exceeds 85 the controller will automatically shut down and restart when it drops below below 75 High Voltage Transients The controller s Solar Inputs are protected against small high voltage surges su...

Страница 22: ...Battery voltage Check if the battery voltage is higher than over Interface too high and disconnect the voltage disconnect blink solar module voltage OVD Load output is normal Interface Battery under charging LED indicator will blink voltage return to green automatically when fully charged The controller will cut off the Interface Battery low voltage output automatically LED disconnect indicator wi...

Страница 23: ...nections Check and confirm that LCD readings are correct Pay attention to any troubleshooting or error indications Take corrective action as necessary Confirm that all the system components are ground connected tightly and correctly Confirm that all the terminals have no corrosion insulation damage signs of high temperature or discoloration Check for dirt insect infestation particularly ants and m...

Страница 24: ...tage Range 8V to 32V Max Solar open Circuit Voltage 100V Max at 25ºC 92V at 25 ºC MPPT Voltage Range 12V Battery 14V to 72V 24V Battery 26V to 72V Max Solar Input Power 260W 12V 520W 24V Controller current consumption 20mA 12V 16mA 24V Temperature Compensation Coefficient 3mV ºC 2V Default Communication RS485 RJ45 interface Grounding Common positive Overall Dimensions 220mm x154mm x 52mm Mounting ...

Страница 25: ...Page 25 Appendix 1 Conversion Efficiency Curves 1 Solar Module MPP Voltage 33V 68 Nominal System Voltage 24V ...

Страница 26: ...Page 26 Appendix 2 Dimensions Dimensions in millimetres ...

Страница 27: ...Li WIFI BLE Android system Depending on the Android version you have you may need the following steps On some phones the App may not immediately connect with eBOx BLE 01 or eBOx WIFI 01 This is because new phones are more sensitive to privacy issues so the APP is often un trus by default So to use it you may need to set the trust option as follows 1 Open Settings and click APPs notifications follo...

Страница 28: ...Page 28 2 Click Permissions 3 Find EPEVER WiFi and click it ...

Страница 29: ... individual permissions and click it 5 Trust this app is disabled by default switch it on by swiping switch symbol to the right 6 The APP should then work normally Then open WIFI or Bluetooth but don t enter password yet ...

Страница 30: ...Page 30 Step 1 Select WIFI or BLE ...

Страница 31: ...Page 31 Step 2 Click Read you should receive a prompt Success ...

Страница 32: ...Page 32 Step 3 Click Battery Settings ...

Страница 33: ...Page 33 Step 4 Click Read if all goes well you will receive a prompt success ...

Страница 34: ...Page 34 Step 5 Modify below parameters according to your Lithium battery specification ...

Страница 35: ...Modify below parameters according to you Lithium battery specification Lithium battery parameters The parameters are in 12V system at 25 C please double the values in 24V system and quadruple the values in 48V system ...

Страница 36: ...age Discharging Limit Voltage V Boost Reconnect Charging voltage Low Voltage Reconnect Voltage VI Low Voltage Disconnect Voltage Over discharging protection voltage BMS 0 2V Voltage LiFePO4 Li NiCoMn O2 User Over Voltage Disconnect Voltage 15 6V 13 5V 9 17V Charging Limit Voltage 14 6V 12 6V 9 17V Over Voltage Reconnect Voltage 14 7V 12 7 9 17V Equalize Charging Voltage 14 5V 12 5V 9 17V Boost Cha...

Страница 37: ...Page 37 Step 7 Click Send you should get a prompt Success ...

Страница 38: ...Page 38 Step 8 Read again check parameters are correct ...

Страница 39: ...ntroller has a proprietary RJ45 connector with a digital output of the system values using RS 485 protocol The communication cable together with the PC Software allows it to connect to a Windows PC and to read and to write the data from to the MP3741 controller Product monitors the following values of battery voltage and current Battery Voltage Solar Module Voltage Load Current Over Discharge Volt...

Страница 40: ... write the data This application is provided as it is free of charge The application is a property of the manufacturer of EP Solar and is provided as it is all software related issues need to be handled with the manufacturer Check more details for the Tracer on GWL Blog ...

Страница 41: ... parameter via PC software Download and install software from here https www epsolarpv com upload file 1811 Controller PCTools V1 93 zip Step 1 Click Parameters Control Parameter Control Parameter For Li Battery controller product ...

Страница 42: ...Page 42 Step 2 Click Read wait for success prompt ...

Страница 43: ...Modify below parameters according to your Lithium battery specification Lithium battery parameters The parameters are in 12V system at 25 C please double the values in 24V system and quadruple the values in 48V system ...

Страница 44: ...age V Boost Reconnect Charging voltage Low Voltage Reconnect Voltage VI Low Voltage Disconnect Voltage Over discharging protection voltage BMS 0 2V Voltage LiFePO4 Li NiCoMn O2 User Over Voltage Disconnect Voltage 15 6V 13 5V 9 17V Charging Limit Voltage 14 6V 12 6V 9 17V Over Voltage Reconnect Voltage 14 7V 12 7 9 17V Equalize Charging Voltage 14 5V 12 5V 9 17V Boost Charging Voltage 14 5V 12 5V ...

Страница 45: ...Page 45 Step 4 Click Updated wait for success prompt ...

Страница 46: ...Page 46 Step 5 Click Read again re check parameters are correct then click to close ...

Страница 47: ...Page 47 Distributed by TechBrands by Electus Distribution Pty Ltd 320 Victoria Rd Rydalmere NSW 2116 Australia Ph 1300 738 555 Int l 61 2 8832 3200 Fax 1300 738 500 www techbrands com Made in China ...

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