PowerTech MP3743 User manual

Brand: PowerTech

Model: MP3743

Type: User manual

This manual is also suitable for

MP3745

PowerTech MP3743 is a versatile solar charge controller designed for both lithium and SLA batteries, offering advanced charging algorithms and comprehensive protection features. Its intelligent MPPT (Maximum Power Point Tracking) technology optimizes energy harvesting from solar panels, maximizing charging efficiency and minimizing losses. The controller also boasts a range of programmable parameters, allowing you to customize charging and load settings to suit your specific system requirements.

50A

MPPT Solar Charge Controller

for Lithium or SLA Batteries

MP3745

User Manual



Contents

I.Mattersneedingattention2

II.Productpicture2,3

III.Descriptionofbasicfunctions3,4

III.DescriptionofLCDscreen4,5

IV.Operationofmachinebuttonsandfunctionintroduction5,6

V.Wirediameterrequirements6

VI.Electricalparameters7

VII.Troubleshooting8

VIII.Customerserviceinformation8



I.Mattersneedingattention

1. Keep the product out of reach of children to avoid using it as a toy and causing personal

injury.

Note!

2. Onlyusetheaccessoriesapprovedbythecompanyorfullycomplywiththerequirementsof

thecompanyforthespecificationsoftheaccessories,orelseitmaycausedanger.



3. Operating voltage range of the charger: 12/24/36/48V battery; it will damage the internal

dischargecircuitifthevoltageexceeds75V,sodonotusebatteriesover60V,orelseitmay

damagethecharger.

4. ThemaximumopencircuitvoltageofPVis135V.Donotexceedtherange

duringuse,orelse

thechargermaybedamaged.

5. Do not touch the heat sink in the process of product operation to avoid hot hands. It is

recommendedtousetheproductonthewall.

6. Operatingtemperature:‐10~+40°C.

7. It is strictly forbidden to use in an environment that may be exposed to rain, which may

cause

danger.



Productpicture(Fig.1)



II.Functionaldescriptionofeachpartofthepanel(refertoFig.1&

2):

1.UP(upbutton)

2.Down(downbutton)

3.MENU(mainmenubutton)

4.Enter(OKbutton)

5.GreenLEDlight(offwhennocharging,flashingduringcharging,stayonwhenfullycharged).

6.RedLEDlight(RedLEDlight(offwhennoerror,erroralarmwhenthelightis

longon,lithium

batteryonlyhas12Vgear,othergearflashingredlighterror)

7.2*3AUSBoutput

8.LCDscreen

Remark:(Theoperationsofpanelitems1‐4areexplainedbelow).



(Fig.2)



9.Externaltemperatureprobe

10.RJ45port,connectedtotheremotecontrolboardthroughthenetworkcableand

synchronizedwiththeLCDscreen(thisportisreservedandtheremotecontrolboardisoptional)

11.PV+(connectedtothepositiveelectrodeofthesolarpanel)

12.PV‐(connected

tothenegativeelectrodeofthesolarpanel)

13.B+(connectedtothepositiveelectrodeofthebattery)

14.B‐(connectedtothenegativeelectrodeofthebattery)

15.L+(connectedtothepositiveelectrodeoftheload)

16.L‐(connectedtothenegativeelectrodeoftheload)

III.Descriptionofbasicfunctions

1. PV(solarpanelinput):

a. ThemaximumopencircuitvoltageofPVis135V.

b. PVintegratesanti‐reverse(reverseconnectionalarmE8,nocharging,pleaseeliminate

thefault).

c. 12Vbattery,PVinputvoltagerangeis16‐108V;24Vbattery,PVinputvoltagerangeis

32‐108V

d. 36Vbattery,PVinputvoltage

rangeis48‐108V;48Vbattery,PVinputvoltagerangeis

64‐108V.

2. Batteryoutputfunction

a. Identify12//24/36/48Vbatteryautomatically;themaximumchargingcurrent

is:12/24V/50A,36V/35A,48V/25A.

b. Anti‐reverseconnection(E1alarm).

3. Loadoutputfunction(defaultOFF).

a. Ratedmaximumoutputcurrent50A(12/24/36/48V).

b. Overcurrentprotection>55A.

c. Shortcircuitprotection(E4alarm;pleaseeliminatethefault).

d. Loadoutputover/undervoltageprotection,recoveryvoltage;refertothesetvoltage.

4. Over‐temperatureprotection

11 12 13 14 15 16

a. Reduceloadincaseofover‐temperature:thechargingcurrentisalways28‐30Awhen

theheatsinktemperature≥75°C.

b. Recoverwhenloadisreduced:resumenormalcharging(50A)whentheheatsink

temperatureis<70°C.

c. Stopchargingwhentheheatsinktemperatureis≥90°C;resume

chargingwhentheheat

sinktemperatureis<60°C.

5. Externaltemperaturecompensationfunction(onlyfor

AGM/STDbattery)

a.1.Thesystemwillautomaticallyadjustthefloatvoltageaccordingtotheambienttemperature.

Theexternaltemperatureprobeispreferred.Iftheexternaltemperatureprobeisnotconnected

(ortheexternaltemperatureis<40°C),use(temperature≥20°C‐5°C)bydefault.2.Thevoltage

mayvarywhentheinputenergyis

insufficienttostabilizetheenergyrequiredforthefloat

charging.

b.For12/24/36/48Vbatteries,whentheexternalprobetemperature≤0°C~40°C,thefloat

chargingvoltageis14.1/28.2V/42.3V/56.4V

For12/24/36/48Vbatteries,whentheexternalprobetemperatureis0°C~20°C,thefloatcharging

voltageis13.8/27.6V/41.4V/55.2V

For12/24/36/48Vbatteries,whentheexternal

probetemperature≥20°C,thefloatcharging

voltageis13.5/27V/40.5V/54V.

6. WIFInetworkingfunction

a. Theproductmayint egrateWIFImoduleornot.

b. IftheproductintegratesaWIFImodule,youcaninstallthemobileAPP,controltheload

switchthroughtheAPPandviewtheMPPTchargerdatainrealtime,suchasbattery

voltage,chargingcurrent,etc.

7. TheLCDbacklight

isturnedoffifthereisnobuttonoperationin1minute;anybutton

operationwillautomaticallyactivatetheLCDbacklight.

8. a.USBbatteryinputundervoltage/overvoltageprotection(10.5V/60V),batteryinput

undervoltage/overvoltagerecovery(11V/59V);

c. USBoutput2*5V/3A.



III.DescriptionofLCDscreen:

ABCDEFG



HIJKLMNOP

A.Sunicon,displayedwhensolarpanelisconnected.

B.Sunlighticon,8intotal,displayaccordingtothechargingcurrent

C.MPPTiconindicatestheMPPTcharger.

D.WIFIicon;turnonWIFIthroughbuttonsettings,readproductdataandcontrolloadoutput

throughAPP.

E.Remotecontrolicon;displayed

whentheremotecontrolisconnected(remotecontrol

optional).

F.Settingsicon;turnonwhenenteringthesettingparameters,andturnoffwhenexit.

D.WIFIicon;WIFION/OFFoptional,defaultON.

F.Batterylevelicon;displaythecorrespondingiconaccordingtothebatteryvoltage.

I.Loadicon;turnon

whentheloadisturnedon,synchronizedwiththeloadswitchON.

J.Connector,three,upcorrespondingtoPV,middlecorrespondingtobattery,down

correspondingtoload.

K.Currentlyidentifiedbatterytype(12/24/36/48V).

L.Protectionicon.Whenthisiconappears,itindicatesthatthemachinehassomeprotection,

suchasload

overcurrent,shortcircuitprotection,undervoltageprotection,etc.(Refertothefault

code).

M.Loadtimingclock2.

N.Loadtimingclock1.

O.Daytimeandnighticons;PV>12V,displaydaytimeicon ;PV<12V,displaynighticon after5

minutes.PV<5Vdisplaynighticon  immediately.

P. Numericaldisplay(8888characters).Thecurrentdataofthemachinecanbeswitchedbythe

MODEbutton,suchasbatteryvoltage/loadvoltage/PV

voltage/time.

IV.Theoperationofmachinebuttonsisdescribedbelow

UPMENU



DownEnter

1. MENUbuttondescription:

a. Pressindefaultinterfaceafterpower‐on:Switchamongbatteryvoltage,loadvoltage,PV

voltageandtimeinterfaceinturn.

b. PressandholdMENUtoentertheparametersettinginterface .Then,pressto

switchamongthe8interfacesinturn.

(1.BatterytypeselectionS(STD),defaultlevel/L(LI)/A(AGM));

(2.WIFIswitchON/OFF,defaultON)

(3.Loadundervoltageprotectionsetting:settingrangeof12Vbatteries:10‐11.5V,



default10V;settingrangeof24Vbatteries:18‐23V,default21V;settingrangeof36V

batteries:30‐34.5,default30V;settingrangeof48V:40‐46,default40V).

(4.Loadundervoltagerecoverysetting:settingrangeof12Vbatteries:12‐13V,default

12.5V;settingrangeof24Vbatteries:24‐26V,default25V;

settingrangeof36V

batteries:36‐39V,default37.5V;settingrangeof48V:48‐55V,default50V).

(5.Timesetting:24‐hoursystem,hour/minutecanbeset).

(6.LOmode:a.Clock1 settingrange0‐120minutes,default60minutes.b.Clock2

 settingrange0‐120minutes,default30minutes.c.Clock

1triggercondition,when

PVvoltage<10V,outputturnsonafterNminutesloaddelay.d.Clock2triggercondition,

when PV>10.5V, the output turns oﬀ aer N minutes load delay, so the loop is repeated)

(7. LD mode: The clock seng range is 0-12 hours. a. Clock 1 trigger condion: When

PV<10V, clock 1 turns on the load for N minutes (clock 1 is set to 3 hours by default), and

clock 2 executes following clock 1. b. Clock 2 turns oﬀ the load for N minutes (clock 2 is

set to 4 hours by default); c. Aer clock 2 execung, the load is always on unl PV>10.5V,

so the loop is repeated)

(8. TO mode: Set the load mer on/oﬀ me; the seng range is 0-24 hours.

a. for example, the default seng: turn on load at 18:00, turn oﬀ load at 6:00. The

program automacally turns on/oﬀ the load at set me).

Remark:

The load switch mode of items 6-8 is OFF by default. Please turn it on as

needed, and set the required me

c. Press and hold MENU to enter the parameter seng

interface :

1. Press MENU to switch among the 8 interfaces in sequence. 2 Press MENU to cancel

the data that has been modiﬁed but hasn’t been saved.

d. Restore the default sengs: ﬁrst press and hold the MENU buon, then turn on the

power of the baery, and the FFFF icon will be displayed on the screen.

2. UP buon descripon

Enter the parameter seng interface: press: UP / (me plus 1 / voltage plus 0.1V); press

and hold: (me / load voltage) values can be accumulated.

Press in default interface aer power-on: switch among (baery voltage/current), (load

voltage/current) and (PV voltage/current).

3. Down buon descripon

Enter the parameter seng interface and press: DOWN / (me minus 1 / voltage

minus 0.1V); press and hold: (me / load voltage) value can be reduced cumulavely.

Press in default interface aer power-on: Switch among baery current, load current,

and PV current.

4. Enter buon descripon

Press: a. In the parameter seng interface: enter to modify parameters / conﬁrm the

modiﬁcaon

b. In the baery voltage interface: load ON/OFF.

V. Wire diameter requirements:

Baery output line: (50A MAX) 6AWG--8AWG; at least 8AWG copper wire, less than 2m.

PV input line: 8AWG--10AWG; professionals can select the appropriate electronic line according

to the actual output PV voltage.

PV input Parameters

PV maximum open circuit voltage (VDC) 135V

MPPT voltage (VDC) 16~108V

Maximum PV input power (W)

12V

baery700W; 24 -48Vbaery

1500W;

Maximum MPPT current (12/24V) /50A; 36V/35A;48V/25A

DC output

Baery voltage (VDC) 12//24/36/48V

Baery capacity (AH)

50AH

Output current (A) 50A

Constant voltage charging voltage STD:14.4V/28.8V/43.2V/57.6V

LI:14.5V

AGM:14.6V/29.2V/43.8V/58.4V

Load output

Output voltage (VDC) 12/24/36/48V

Output current (A) 50A/55A

USB output

Output voltage (VDC) 5

Number of USB ports 2

Maximum output current (A) 3.4A Max

Standby current Baery input 12V

Separate MPPT charger < 60 mA

MPPT charger + WIFI module < 160 mA

Protecve funcon

PV/baery input high/low voltage

protecon

Yes

PV/baery reverse connecon protecon Yes

Load overcurrent / short circuit protecon Yes

Temperature protecon Yes (90°C)

Mechanical dimensions

Length X width X height (mm) 238*177*73

Weight 2.3 KG

General data

Operang temperature (°C) - 10~ +40

Cooling method Heat sink

Insulaon class CLASS 1

Protecon level IP30

VI. Electrical Parameters:

VII. Fault Codes

E1 reverse connec (please correct)

open circuit prot on ry not connected / or low

voltage

overcurrent prot on (circuit has constant current

the machine may be damaged if there is an error)

Load overcurrent /short circuit protec

(error 10S, turn on the

load

elimina g the error)

E5 overvoltage (ba ery damaged or high ry voltage)

E6 PV (solar) input overvoltage protec on (PV>135V)

Over-temperature protec

, stop charging when heat sink

temperature ≥ 90°C; resume when temperature ≤ 60°C

E8 PV reverse conne on (please correct)

ery over and under voltage range

Capacity:12V/24V/36V/48V

low-voltage pr LCD

display:E2

<8/18/27/36V

Capacity:12V/24V/36V/48V

Over voltage protec on LCD

display:E5

>15/31/45/60V

Remark: Please eliminate the fault according to the error code. If the

machine s

does not respond the error is eliminated, it may be

damaged and need

-sales service.

Distributed By:

Electus Distribution Pty. Ltd.

320 Victoria Rd, Rydalmere

NSW 2116 Australia

www.electusdistribution.com.au

PowerTech MP3743 User manual

Brand: PowerTech

Model: MP3743

Type: User manual

This manual is also suitable for

MP3745

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PowerTech MP3743 User manual

This manual is also suitable for

PowerTech MP3743 User manual

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