marvelTech MPC-40A User manual

STEP-DOWN MPPT
SOLAR CHARGE CONTROLLER
User Manual
MPC-40A

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
Contents
1. Important Safety Instructions ...................................................................1
1.1 Precautions................................................................................................1
1.2 Safety information....................................................................................1
2. Product Introduction ......................................................................................2
2.1 Product Feature........................................................................................2
2.2 Application Area........................................................................................2
3. Product Overview.............................................................................................3
4. Installation Instructions..................................................................................4
4.1 Installation Precautions..........................................................................4
4.2 Installation Steps......................................................................................4
4.3 Product Connection.................................................................................5
5. Product Operation............................................................................................6
6. Product protection Function........................................................................7
6.1 Over Temperature protection...............................................................7
6.2 Reverse current protection...................................................................7
6.3 Short Circuit/Over Circuit Protection.................................................8
6.4 Input Low voltage Protection...............................................................8
6.5 Output Over voltage protection...........................................................8
7. Technical Parameters....................................................................................9
7.1 Electric Parameter...................................................................................9
7.2 Efficiency Curve.......................................................................................10
7.3 Other Parameter......................................................................................11
7.4 Shape Parameter....................................................................................11
8. General Troubleshooting............................................................................12
9. Use Environment….......................................................................................13

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
1/ 13
1IMPORTANT SAFETY INSTRUSCTIONS
Please keep this manual well.
This manual contains important safety, installation, and operating
instructions for the MPPT solar controller.
Before starting the installation, please read all instructions and
precautions in the manual.
Warning: Indicates a potentially hazardous situation that requires
special care when performing related operations.
Caution: Represents critical procedures for the safe and correct
operation of the controller.
Attention: Indicates a program or function that is important for the
safety and correct operation of the controller.
1.1 PRECAUTIONS
Caution
1.1.1 The controller has no components that require maintenance or
repair inside. Please do not disassemble or attempt to repair the
controller.
1.1.2 Solar controllers may generate heat during operation, so it is
recommended to install them in an environment with good ventilation and
heat dissipation.
1.1.3 After installation, check all the line connections to ensure they are
tight and avoid the danger of heat accumulation caused by virtual
connections.
1.2 SAFETY INFORMATION
1.2.1 Please read this manual carefully before using and installing this
product, so that you can use it better.
1.2.2 When the device is not in use for a long time, the battery and
photovoltaic switch should be turned off.
1.2.3 There are high voltages and currents inside the machine,
non-professional personnel are not allowed to disassemble the machine.
1.2.4 The input and output terminals should be connected reliably to
avoid heating at the connection point.
1.2.5 If you encounter a fault that other users cannot solve, please
contact the manufacturer's after-sales maintenance personnel.

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
2/ 13
2PRODUCT INTRODUCTION
The step-down MPPT solar controller EMD600W is an intelligent
photovoltaic controller designed for small photovoltaic off-grid power
generation systems. It uses the industry leading MPPT maximum power
point tracking technology to achieve maximum energy tracking of solar
panels, enabling it to quickly and accurately track the maximum power
point of solar cells in any environment, and obtain the maximum energy
of solar panels in real-time, significantly improve the energy utilization
rate of solar systems.
2.1 PRODUCT FEATURE
2.1.1 Using MPPT (Maximum Power Point Tracking) technology, the
efficiency of MPPT tracking reach up to 99%
2.1.2 Using high efficiency synchronous rectifier circuit structure
2.1.3 MAX output power: 600W
2.1.4 Input voltage: 17-55V Output voltage: 10-30V
2.1.5 Efficiency ≥97%
2.1.6 Output voltage adjustable
2.1.7 Support for lead-acid & lithium battery etc.
2.1.8 Supports lithium battery and lead-acid activation
2.1.9 High-definition LCD screen display input voltage, output voltage &
output current
2.1.10 Intelligent temperature control & use a fan for heat dissipation
2.1.11 Under-voltage protection, Over-temperature protection,
Short-circuit protection, Output over-current protection, Over voltage
protection, Reverse current protection
2.1.12 High-quality aluminum radiators & high-temperature reduction
treatments ensure reliable & efficient operation in various working
environments
2.2 APPLICATION AREA
Solar power generation
Outdoor energy storage power supply
RV backup power supply
Household appliances
Lighting
Digital products
Solar powered toy cars

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
3/ 13
3PRODUCT OVERVIEW
The following accessories are included after purchasing the device:
A 1 pc Solar charge controller
B 1 pc Connector
C 1 pc User manual
If you find a lack of accessories, please contact the manufacturer or
dealer.
Check whether there is any damage during transportation.
After receiving the solar controller, do not be in a hurry to sign for it. First,
open the seal and check whether the device has obvious falls such as
deformation or shell cracks. If there are similar damages, refuse to sign
for it, and contact the manufacturer or dealer.
Check MPPT solar charge controller
There is a label on the side of the solar controller for this charging
controller. If you find that it does not match the product you purchased,
please contact the manufacturer or dealer.

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
4/ 13
4INSTALLATION INSTRUCTIONS
4.1 INSTALLATION PRECAUTIONS
It is recommended that equipment installation be carried out by
professional personnel or assisted by local dealers.
The input and output lines should be distinguished to prevent
incorrect connections.
The battery's positive and negative terminals should be correctly
connected, and the battery voltage should match the machine
model.
Do not expose the equipment to harsh environments such as
moisture, flammable or explosive substances, or areas with a lot of
dust accumulation. Do not cover or obstruct the equipment.
A space of more than 10 cm should be left around the ventilation
openings and equipment to ensure good air circulation for heat
dissipation.
4.2 INSTALLATION STEPS
Attention:
Step 1: Choose an installation location:
Install on a solid surface.
Install in a location that can be easily removed.
The ambient temperature should be between -20℃and 60℃to
ensure optimal working conditions.
Do not install the charging controller in direct sunlight to avoid power
loss caused by overheating.
Do not install on flammable building materials or highly flammable
material attachments, and do not install in areas with potential
explosion hazards.
Do not install the charging controller in direct sunlight to prevent
power losses due to overheating.
Step 2: Inspection and Cleaning: Place the controller in the intended
installation location and check for adequate ventilation space
above and below, as well as enough space for wiring around the
controller.
Step 3: Marking: Use a pen to mark the four mounting hole locations on
the installation surface.
Step 4: Drilling: Move the controller aside and drill four appropriately
sized mounting holes at the marked positions.

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
5/ 13
Step 5: Securing the Controller: Place the controller back onto the
installation surface, aligning it with the four holes drilled in Step 4,
and use screws to secure the controller in place.
4.3 PRODUCT CONNECTION
3Warning:
1. It is prohibited to connect the positive and negative poles in
reverse.
2. Explosion or fire is strictly prohibited! Do not short-circuit the
positive and negative poles of the battery or the cables.
Step 1: Connect the photovoltaic module
Caution:
1. If you are unsure about the scientifically reasonable series-parallel
connection method for photovoltaic modules, please contact the
manufacturer of this controller for consultation.
2. The controller can be used with various types of photovoltaic
modules such as monocrystalline silicon, polycrystalline silicon,
and thin film.
3. Connect the positive (+) pole of the photovoltaic module to the
positive input (red wire) of the controller, and connect the negative
(-) pole of the photovoltaic module to the negative input (black wire)
of the controller.
Step 2: Setting the controller output voltage
The output voltage of the controller is the charging voltage of the battery.
If you are unsure about the charging voltage of the battery, please contact
the battery manufacturer or the controller manufacturer.
Step 3: Connecting the battery
Connect the positive (+) pole of the battery to the positive output (yellow
wire) of the controller, and connect the negative (-) pole of the battery to
the negative output (black wire) of the controller.

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
6/ 13
5 PRODUCT OPERATION
Figure 5-1: Normal Working Display Interface
Figure 5-2: Voltage Setting Display Interface
The output voltage of the controller can be adjusted by the user. The
voltage setting range is automatically limited based on the input voltage,
and any adjustments outside of this range will not be valid. The specific
operation method is as follows:
1. In normal working mode, press the [SET] button to enter the [Voltage
Setting Display Interface] (shown in Figure 5-2) from the [Normal
Working Display Interface] (shown in Figure 5-1).
2. The user can increase or decrease the [set voltage value] by
pressing the [+] or [-] buttons as needed. Each click changes the
voltage by 0.1V, and holding down the button allows for quick
continuous adjustment. The voltage setting range is automatically
limited based on the input voltage, and the button will not respond if
the adjustment is outside of this range.
3. Once the desired [set voltage value] has been reached, press the
[OK] button to confirm it. Only then will the last [set voltage value] be
remembered by the controller, and it will display [Setting Successful].
4. After a successful setting, the controller will exit the [Voltage Setting
Display Interface] and return to the [Normal Working Display Interface]
after 4 seconds.
5. Although the user has entered the [Voltage Setting Display Interface],
if they do not press the [OK] button within 4 seconds after the last [+] /
[-] button pressing, the controller will automatically exit the [Voltage
Setting Display Interface]. In this case, the last [set voltage value]
adjustment will not be valid and will not be remembered.

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
7/ 13
Warm reminder:
In normal working mode, pressing [SET] will enter the [Voltage
Setting Display Interface],
By simultaneously pressing [SET] and [+] together, the [set voltage
value] can be quickly adjusted to 24V;
Similarly, pressing [OK] and [-] together, the [set voltage value] can
be quickly adjusted to 12V.
6 PRODUCT PROTECTION FUNCTION
6.1 OVER TEMPERATURE PROTECTION
When the internal ambient temperature of the MPPT controller exceeds
100℃, the MPPT controller will reduce its output power. If the internal
ambient temperature continues to rise to 110℃, the MPPT controller will
automatically shut down its output and display [Over Temperature] as
shown in Figure 6-1. When the internal ambient temperature of the MPPT
controller is below 85℃, it will automatically resume operation.
When the internal ambient temperature of the MPPT controller exceeds
65℃or the charging current is greater than 30A, the MPPT controller will
automatically turn on the fan. When the internal ambient temperature of
the MPPT controller is below 45℃, the fan will automatically turn off.
Figure 6-1: Over Temperature Interface
6.2 REVERSE CURRENT PROTECTION
Using MOSFET-based reverse current protection technology, it
automatically disconnects when the solar panel output voltage is lower
than the battery voltage, preventing reverse current flow, protecting
battery energy storage, and avoiding waste.

MPPT SOLAR CHARGE CONTROLLER USER MANUAL
8/ 13
6.3 SHORT CIRCUIT/OVER CIRCUIT PROTECTION
When a short circuit or overcurrent occurs unexpectedly in the output of
the MPPT controller, the MPPT controller automatically shuts down the
output and displays [Over current] as shown in Figure 6-3. Normal
operation resumes after the short circuit is eliminated.
Figure 6-3: Overcurrent Protection Interface
6.4 INPUT LOW VOLTAGE PROTECTION
When the MPPT controller is powered on, the input voltage needs to be
higher than 17V to start working. During normal operation, the input
voltage needs to be at least 1.15 times higher than the output voltage to
achieve better charging performance.
6.5 OUTPUT OVER VOLTAGE PROTECTION
When the MPPT controller is powered on, if the battery voltage is higher
than controller's set output voltage, the controller cannot work properly
and will display [output overvoltage] as shown in Figure 6-5. The output
voltage of the controller should be adjusted to match the charging voltage
of the battery, and then the controller will return to normal operation.
Figure 6-5: Output Over-Voltage Protection interface