PowerTech MP3743 User manual

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

PowerTech MP3743, MP3745 User manual

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