PowerTech MP3745 User manual
1
50A
MPPT Solar Charge Controller
for Lithium or SLA Batteries
MP3745
User Manual
2
Contents
I.Mattersneedingattention2
II.Productpicture2,3
III.Descriptionofbasicfunctions3,4
III.DescriptionofLCDscreen4,5
IV.Operationofmachinebuttonsandfunctionintroduction5,6
V.Wirediameterrequirements6
VI.Electricalparameters7
VII.Troubleshooting8
VIII.Customerserviceinformation8
3
I.Mattersneedingattention
1. Keeptheproductoutofreachofchildrentoavoidusingitasatoyandcausingpersonal
injury.
Note!
2. Onlyusetheaccessoriesapprovedbythecompanyorfullycomplywiththerequirementsof
thecompanyforthespecificationsoftheaccessories,orelseitmaycausedanger.
3. Operatingvoltagerangeofthecharger:12/24/36/48Vbattery;itwilldamagetheinternal
dischargecircuitifthevoltageexceeds75V,sodonotusebatteriesover60V,orelseitmay
damagethecharger.
4. ThemaximumopencircuitvoltageofPVis135V.Donotexceedtherangeduringuse,orelse
thechargermaybedamaged.
5. Donottouchtheheatsinkintheprocessofproductoperationtoavoidhothands.Itis
recommendedtousetheproductonthewall.
6. Operatingtemperature:‐10~+40°C.
7. Itisstrictlyforbiddentouseinanenvironmentthatmaybeexposedtorain,whichmay
causedanger.
4
Productpicture(Fig.1)
II.Functionaldescriptionofeachpartofthepanel(refertoFig.1&
2):
1.UP(upbutton)
2.Down(downbutton)
3.MENU(mainmenubutton)
4.Enter(OKbutton)
5.GreenLEDlight(offwhennocharging,flashingduringcharging,stayonwhenfullycharged).
6.RedLEDlight(RedLEDlight(offwhennoerror,erroralarmwhenthelightislongon,lithium
batteryonlyhas12Vgear,othergearflashingredlighterror)
7.2*3AUSBoutput
8.LCDscreen
Remark:(Theoperationsofpanelitems1‐4areexplainedbelow).
8
6
7
5
4
3
2
1
5
(Fig.2)
9.Externaltemperatureprobe
10.RJ45port,connectedtotheremotecontrolboardthroughthenetworkcableand
synchronizedwiththeLCDscreen(thisportisreservedandtheremotecontrolboardisoptional)
11.PV+(connectedtothepositiveelectrodeofthesolarpanel)
12.PV‐(connectedtothenegativeelectrodeofthesolarpanel)
13.B+(connectedtothepositiveelectrodeofthebattery)
14.B‐(connectedtothenegativeelectrodeofthebattery)
15.L+(connectedtothepositiveelectrodeoftheload)
16.L‐(connectedtothenegativeelectrodeoftheload)
III.Descriptionofbasicfunctions
1. PV(solarpanelinput):
a.ThemaximumopencircuitvoltageofPVis135V.
b.PVintegratesanti‐reverse(reverseconnectionalarmE8,nocharging,pleaseeliminate
thefault).
c.12Vbattery,PVinputvoltagerangeis16‐108V;24Vbattery,PVinputvoltagerangeis
32‐108V
d.36Vbattery,PVinputvoltagerangeis48‐108V;48Vbattery,PVinputvoltagerangeis
64‐108V.
2. Batteryoutputfunction
a.Identify12//24/36/48Vbatteryautomatically;themaximumchargingcurrent
is:12/24V/50A,36V/35A,48V/25A.
b.Anti‐reverseconnection(E1alarm).
3. Loadoutputfunction(defaultOFF).
a.Ratedmaximumoutputcurrent50A(12/24/36/48V).
b.Overcurrentprotection>55A.
c.Shortcircuitprotection(E4alarm;pleaseeliminatethefault).
d.Loadoutputover/undervoltageprotection,recoveryvoltage;refertothesetvoltage.
4. Over‐temperatureprotection
11 12 13 14 15 16
10
9
6
a.Reduceloadincaseofover‐temperature:thechargingcurrentisalways28‐30Awhen
theheatsinktemperature≥75°C.
b.Recoverwhenloadisreduced:resumenormalcharging(50A)whentheheatsink
temperatureis<70°C.
c.Stopchargingwhentheheatsinktemperatureis≥90°C;resumechargingwhentheheat
sinktemperatureis<60°C.
5. Externaltemperaturecompensationfunction(onlyfor
AGM/STDbattery)
a.1.Thesystemwillautomaticallyadjustthefloatvoltageaccordingtotheambienttemperature.
Theexternaltemperatureprobeispreferred.Iftheexternaltemperatureprobeisnotconnected
(ortheexternaltemperatureis<40°C),use(temperature≥20°C‐5°C)bydefault.2.Thevoltage
mayvarywhentheinputenergyisinsufficienttostabilizetheenergyrequiredforthefloat
charging.
b.For12/24/36/48Vbatteries,whentheexternalprobetemperature≤0°C~40°C,thefloat
chargingvoltageis14.1/28.2V/42.3V/56.4V
For12/24/36/48Vbatteries,whentheexternalprobetemperatureis0°C~20°C,thefloatcharging
voltageis13.8/27.6V/41.4V/55.2V
For12/24/36/48Vbatteries,whentheexternalprobetemperature≥20°C,thefloatcharging
voltageis13.5/27V/40.5V/54V.
6. WIFInetworkingfunction
a.TheproductmayintegrateWIFImoduleornot.
b.IftheproductintegratesaWIFImodule,youcaninstallthemobileAPP,controltheload
switchthroughtheAPPandviewtheMPPTchargerdatainrealtime,suchasbattery
voltage,chargingcurrent,etc.
7. TheLCDbacklightisturnedoffifthereisnobuttonoperationin1minute;anybutton
operationwillautomaticallyactivatetheLCDbacklight.
8. a.USBbatteryinputundervoltage/overvoltageprotection(10.5V/60V),batteryinput
undervoltage/overvoltagerecovery(11V/59V);
c.USBoutput2*5V/3A.
7
III.DescriptionofLCDscreen:
ABCDEFG
HIJKLMNOP
A.Sunicon,displayedwhensolarpanelisconnected.
B.Sunlighticon,8intotal,displayaccordingtothechargingcurrent
C.MPPTiconindicatestheMPPTcharger.
D.WIFIicon;turnonWIFIthroughbuttonsettings,readproductdataandcontrolloadoutput
throughAPP.
E.Remotecontrolicon;displayedwhentheremotecontrolisconnected(remotecontrol
optional).
F.Settingsicon;turnonwhenenteringthesettingparameters,andturnoffwhenexit.
D.WIFIicon;WIFION/OFFoptional,defaultON.
F.Batterylevelicon;displaythecorrespondingiconaccordingtothebatteryvoltage.
I.Loadicon;turnonwhentheloadisturnedon,synchronizedwiththeloadswitchON.
J.Connector,three,upcorrespondingtoPV,middlecorrespondingtobattery,down
correspondingtoload.
K.Currentlyidentifiedbatterytype(12/24/36/48V).
L.Protectionicon.Whenthisiconappears,itindicatesthatthemachinehassomeprotection,
suchasloadovercurrent,shortcircuitprotection,undervoltageprotection,etc.(Refertothefault
code).
M.Loadtimingclock2.
N.Loadtimingclock1.
8
O.Daytimeandnighticons;PV>12V,displaydaytimeicon ;PV<12V,displaynighticonafter5
minutes.PV<5Vdisplaynighticon immediately.
P. Numericaldisplay(8888characters).Thecurrentdataofthemachinecanbeswitchedbythe
MODEbutton,suchasbatteryvoltage/loadvoltage/PVvoltage/time.
IV.Theoperationofmachinebuttonsisdescribedbelow
UPMENU
DownEnter
1. MENUbuttondescription:
a.Pressindefaultinterfaceafterpower‐on:Switchamongbatteryvoltage,loadvoltage,PV
voltageandtimeinterfaceinturn.
b.PressandholdMENUtoentertheparametersettinginterface .Then,pressto
switchamongthe8interfacesinturn.
(1.BatterytypeselectionS(STD),defaultlevel/L(LI)/A(AGM));
(2.WIFIswitchON/OFF,defaultON)
(3.Loadundervoltageprotectionsetting:settingrangeof12Vbatteries:10‐11.5V,
default10V;settingrangeof24Vbatteries:18‐23V,default21V;settingrangeof36V
batteries:30‐34.5,default30V;settingrangeof48V:40‐46,default40V).
(4.Loadundervoltagerecoverysetting:settingrangeof12Vbatteries:12‐13V,default
12.5V;settingrangeof24Vbatteries:24‐26V,default25V;settingrangeof36V
batteries:36‐39V,default37.5V;settingrangeof48V:48‐55V,default50V).
(5.Timesetting:24‐hoursystem,hour/minutecanbeset).
(6.LOmode:a.Clock1settingrange0‐120minutes,default60minutes.b.Clock2
settingrange0‐120minutes,default30minutes.c.Clock1triggercondition,when
PVvoltage<10V,outputturnsonafterNminutesloaddelay.d.Clock2triggercondition,
9
when PV>10.5V, the output turns offaer N minutes load delay, so the loop is repeated)
(7. LD mode: The clock seng range is 0-12 hours. a. Clock 1 trigger condion: 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 offthe load for N minutes (clock 2 is
set to 4 hours by default); c. Aer clock 2 execung, the load is always on unl PV>10.5V,
so the loop is repeated)
(8. TO mode: Set the load mer on/offme; the seng range is 0-24 hours.
a. for example, the default seng: turn on load at 18:00, turn offload at 6:00. The
program automacally turns on/offthe 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 seng
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 sengs: first press and hold the MENU buon, then turn on the
power of the baery, and the FFFF icon will be displayed on the screen.
2. UP buon descripon
Enter the parameter seng interface: press: UP / (me plus 1 / voltage plus 0.1V); press
and hold: (me / load voltage) values can be accumulated.
Press in default interface aer power-on: switch among (baery voltage/current), (load
voltage/current) and (PV voltage/current).
3. Down buon descripon
Enter the parameter seng interface and press: DOWN / (me minus 1 / voltage
minus 0.1V); press and hold: (me / load voltage) value can be reduced cumulavely.
Press in default interface aer power-on: Switch among baery current, load current,
and PV current.
4. Enter buon descripon
Press: a. In the parameter seng interface: enter to modify parameters / confirm the
modificaon
b. In the baery voltage interface: load ON/OFF.
V. Wire diameter requirements:
Baery 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.
10
PV input Parameters
PV maximum open circuit voltage (VDC) 135V
MPPT voltage (VDC) 16~108V
Maximum PV input power (W) 12Vbaery≦700W; 24 -48Vbaery≦
1500W;
Maximum MPPT current (12/24V) /50A; 36V/35A;48V/25A
DC output
Baery voltage (VDC) 12//24/36/48V
Baery 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 Baery input 12V
Separate MPPT charger < 60 mA
MPPT charger + WIFI module < 160 mA
Protecve funcon
PV/baery input high/low voltage
protecon
Yes
PV/baery reverse connecon protecon Yes
Load overcurrent / short circuit protecon Yes
Temperature protecon Yes (90°C)
Mechanical dimensions
Length X width X height (mm) 238*177*73
Weight 2.3 KG
General data
Operang temperature (°C) -10~ +40
Cooling method Heat sink
Insulaon class CLASS 1
Protecon level IP30
VI. Electrical Parameters:
11
VII. Fault Codes
E1 reverse connec (please correct)
E2 open circuit prot on ry not connected / or low
voltage
E3 overcurrent prot on (circuit has constant current
the machine may be damaged if there is an error)
E4 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)
E7 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
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