PowerTech MP-3750 User Manual

1 2
Solar Charge Controller with 2 USB Outlets
MP-3750, MP-3752
User Manual
1. Safety Information
 Read all of the instructions in the manual before installation.
 DO NOT disassemble or attempt to repair the controller.
 Install external fuse or breaker as required.
 Do disconnect the solar module and fuse/ breakers near to battery before
installing or moving the controller.
 Power connections must remain tight to avoid excessive heating from a
loose connection.
 Only charge batteries that comply with the parameters of controller.
 Battery connection may be wired to one battery or a bank of batteries.
 Risk of electric shock, the PV and load can produce high voltages when the
controller is working.
2. Overview
PWM charge controller with USB output that adopts the most advanced digital
technique. It’s an easy operation and cost efficient controller featured as:
 3-Stage intelligent PWM charging：Bulk, Boost/Equalize, Float
 Support 3 charging options: Sealed, Gel, and Flooded
 Battery status LED indicator can indicates battery situation
 Battery temperature compensation function
 The USB will provide power supply that can charge for electronic equipment
 Battery type and load output can be set via button
 Extensive Electronic protection
3. Product Features
①
Mounting Hole Φ4.5
⑥
Button
②
PV Terminals
⑦
Battery status LED indicator
③
Battery Terminals
⑧
Load status LED indicator
④
Load Terminals
⑨
Charging status LED indicator
⑤
USB Output Port
4. Wiring
(1) Connect components to the charge controller in the sequence as shown
below and pay much attention to the “+” and “-”. Please don’t insert the fuse or
turn on the breaker during the installation.
(2) After power on the controller, check the Battery LED indicator on the
controller, it will be on solid green. Otherwise please refer to chapter 8.
Always connect the battery first, in order to allow the controller to recognize
the system voltage.
(3) The battery fuse should be installed as close to battery as possible. The
suggested distance is within 150mm.
5. LED Indicators
1) Charging and load status indicator
Indicator
Color
Status
Instruction
Charging status
LED indicator
Green
On Solid
In Charging
Green
OFF
No Charging
Green
Fast Flashing
Battery Over
Voltage
Load status LED
indicator
Green
On Solid
Load ON
Green
OFF
Load OFF
Green
Slowly Flashing
Load over load
Green
Fast Flashing
Load short circuit
2) Battery status indicator
LED1
LED2
LED3
LED4
Battery Status
Slowly Flashing
×
×
×
Under voltage
Fast Flashing
×
×
×
Over discharge
Battery LED indicator status during voltage is up
○
○
×
×
12.8V＜ U
bat
＜13.4V
○
○
○
×
13.4V＜ U
bat
＜14.1V
○
○
○
○
14.1V ＜ U
bat
Battery LED indicator status during voltage is down
○
○
○
×
12.8V＜U
bat
＜13.4V
○
○
×
×
12.4V＜U
bat
＜12.8V
○
×
×
×
U
bat
＜12.4V
NOTE:
①Voltage value for 12V system at 25℃, please use 2× in 24V system ;
②"○"LED indicator on; "×"LED indicator off.
6. Setting Operation
1)Load ON/OFF Setting
When the controller is powered on, press the button to control the load
output.
NOTE: The USB will output when the load is on.
2)Battery Type Setting
Operation:
Step 1: Enter setting mode by pressing button for 5s until the battery status
LEDs are flashing.
Step 2: Select the desired mode by pressing button.
Step 3: The mode will be saved automatically without any operation for 5S and
LED will stop flashing.
Battery Type Indicator
LED1
LED2
LED3
Battery type
○
×
×
Sealed(Default)
○
○
×
Gel
○
○
○
Flooded
NOTE: "○"LED indicator on "×"LED indicator off
Figure 1 Product Feature
Figure 2 Connection diagram
④
①
⑤
⑥
⑦
⑧
⑨
②
③
LED1
LED2
LED3
LED4

PowerTech MP-3750 Specifications

General

Brand	PowerTech
Model	MP-3750
Category	Inverter
Language	English