PowerTech MP3755 User manual
1
12V/24V 30A
PWM Solar Charge Controller
for Lithium or SLA Batteries
MP3755
User Manual
2
Contents
ProductOver:Page3
ProductAppearanceDiagram:Page4
LCDDiagram:Pages5‐8
ProductFunctionSettingsandLCDDiagram:Pages9‐14
ProductSpecifications:Pages15‐18
CertificationandEnvironmentalProtection:Page19
Precautions:Page19
3
1.ProductOverview
ThisproductadoptsthelatestPWMcontroltechnologyandintelligentsolar
controllercontrolledbyMCU.ItintegratesWIFIfunctionandallowsviewingthe
workingstatusoftheproductthroughmobileAPP,featuringhighefficiency,lowloss,
smallsize,lightweight,LCDinterface,backlight,andcompleteprotectionfunctions.
Itisthebestchoiceforchargingonboard,domesticandindustrialbatteries.The
producthasthefollowingfeatures.
1.Allowcharging12V/24Vlead‐acidbatteryandlithiumbattery,whichismore
intelligentandsimpletooperate.
2.Adoptintelligent4‐stagechargingmanagement:batterytest;currentlimiting;
constantvoltage;floatvoltage.
3.Integrateavarietyofchargingmodes:AGM;STD;LI.
4.Wrongbatteryprompt,reverseconnectionpromptandprotection,
over‐temperatureprotection,powerfailurememory,shortcircuitprotection,etc.
5.Thebuttonallowsselectingthechargingmode.
6.Theambienttemperatureis‐10~50°C.
4
2. Product Appearance Diagram
Product Appearance Diagram
Fig. 1: Structure Diagram
A: Solar input connected to the posive electrode, B: Solar input connected to the negave
electrode
C: Baery connected to posive electrode, D: Baery connected to negave electrode
E: Load output posive, F: Load output negave; E. MODE buon
H: LED indicator light, red light on in case of error, flashing green during charging, stay green aer
fully charged.
M, L: USB output interface
J: Menu buon, K: OK buon, I: UP buon, G: DOWN buon
O: External temperature sensing line interface
P: RJ45 handle interface (the handle is an LCD, and the display content is the same as the host
LCD)
Q: LCD
R: Screw fixing posion
6
To view LCD parameters and set funcons, press the UP/DOWN buon in the
default interface (baery voltage interface) to view the baery charging current;
press the Menu buon once, then press the UP/DOWN buon to view the baery
in turn to view the baery voltage,charging current,load current, solar voltage,
me, and LCD display as follows.
7
PresstheMenubuttontwiceinthedefaultinterfacetoviewthesolarpanel
voltageandcurrent,andpresstheUP/DOWNbuttontoswitch.
8
PresstheMenubuttononceinthedefaultinterfacetoviewtheloadvoltageand
current,andpresstheUP/DOWNbuttontoswitch.
9
PresstheMenubuttonthreetimesinthedefaultinterfacetoviewthetime.
10
4.FunctionsettingsandLCDiconsareasfollows:
PressandholdMenufor2secondsinthedefaultstatetoentertheSettingsinterface,
presstheMenubuttonrepeatedlytoswitchtobatterycategorysetting,WIFIswitch
setting,undervoltageprotectionsetting,restartvoltagesettingafterundervoltage,
clocksetting,timerswitchsetting,dawnloadTOmode,anddawnloadLdmode.
Pressthe“OK”buttontoenterdesiredfunction,presstheUP/DOWNbuttontoselect,
andthenpress“OK”toconfirm.
Batterycategorymode
AboveistheAGMbatterymode.
11
Aboveisthelithiumbatterymode
AboveistheSTDbatterymode
12
AboveistheWIFIswitchcontrolmode
Aboveisthebatteryundervoltageprotectionsetting
13
Thefigureaboveshowstherestartvoltagesettingafterundervoltage
14
The figure above shows the me seng
The figure above shows the LO mer load mode seng. Whenthe PV is less
than 11V, the clock 1 is the delay onload, and the clock 2 is the delay offload
me (in minutes) whenthe PV is greater than 11V.
The figure above shows the mer switch seng, and the clock 1 or 2 allows
sengthe switching me (same as the product clock).
15
The figure above shows the Ld load mode seng. Whenthe PV is less than 11V,
the clock 1 is turned on, the clock 2 is the offload me, and thenthe load is
turned onunl the PV is greater thanthe 11V offload.
The “TO”, “LO” and “Ld” load mode sengmenoned above refers to the DC
output, excluding the sengs for the USB output. USB is automacally turned on
and automacally turns offwhenundervoltage.
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5. Product Funcon
5.1 This product adopts 4-stage charging mode: baery test; current liming;
constant voltage; float charging.
5.2 Baery test: Aer the baery is connected, it will check whether the baery
meets the voltage requirements for the operaon of this product.
5.3 Current liming: This product allows a maximum charging current of 30A.
5.4 Constant voltage: When the maximum voltage allowed by this product is
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reached, the product will be charged at the highest voltage point unl the
current is reduced to below 3A or the me exceeds 3 hours.
5.5 Float charging: Float charging is started aer constant voltage charging, but
charging voltage and current are smaller; it is maintenance charging and
allows a longer me of safe charging. By float charging, the baery can be
charged to nearly 100%. Too small current is not enough to make up for
self-discharging of the baery, while excessive current will lead to
overcharging and dehydraon; small current charging for a long me can
eliminate sulfuraon of negave plate.
5.6 USB output: This product has two USB output interfaces, the output voltage is
5V, and the maximum current is 3.4A; smart idenficaon of the terminal
device is available.
5.7 Charging voltage profile
Current Liming
Secon
Constant Pressure Secon
Floang Change
Secon
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5.8 Technical Specifica ons
6. Cerfica and environmental prot
Meet CE, RoHs and PAHs requirements;
7. Prec
7.1 The solar input voltage must not exceed 51V (VOC), and the current must not
exceed 30A.
7.2 Pay a en on to polarity when co g, and do not reverse the polarity.
7.3 The maximum output of the USB port can only be 3.4A. Check the maximum
charging current of the charging product before charging.
7.4 This product can only be used indoors.
Distributed By:
Electus Distribution Pty. Ltd.
320 Victoria Rd, Rydalmere
NSW 2116 Australia
www.electusdistribution.com.au
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