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
Battery status LED indicator
Load status LED indicator
Charging status LED indicator
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
Charging status
LED indicator
Load status LED
indicator
2) Battery status indicator
Battery LED indicator status during voltage is up
Battery LED indicator status during voltage is down
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
NOTE: "○"LED indicator on "×"LED indicator off
Figure 2 Connection diagram
To Next Page
Need help?
General
