HQST M2420N MPPT 20 Amp Negative Ground Solar Charge Controller User Manual

: June 6, 2024
: HQST

MPPT 20 Amp Negative Ground Solar Charge Controller

MPPT Charge Controller
Negative Grounded
M2420N / M2430N M2440N / M4860N
User Manual

*We may modify these specifications without prior notice.

Warnings and Tools Icon Chart

Icons

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Name

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Description

---|---|---

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High Voltage

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High voltage device.
Installation should be performed by an electrician.

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High Temperature

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This device will produce heat.
Mount device away from other items.

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Environmental Hazard

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Electronic Equipment. Do not put in landfill.

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Wire Stripper

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A wire cutter is needed for cutting and stripping wires prior to connection.

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Multimeter

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A multimeter is needed for testing equipment and verifying polarity of cables.

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Anti-static Glove

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Anti-static gloves are recommended to prevent controller damage caused by static electricity.

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Electrical Tape

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Electrical tape is recommended to safely insulate spliced or bare wires.

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Screwdriver

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A common size screwdriver is needed when attaching wires to the controller.

Safety Tips

Review this manual thoroughly before attempting installation.
Beware of any nearby electrical equipment that may interfere with installing this device.
Solar panels can generate high voltages and currents, make sure your solar panels are completely covered from sunlight during installation. It is recommended that installation be performed by a qualified electrician.
Connecting wires to this device can generate sparks, please wear proper insulation gear while installing this device.
To avoid damage to the battery or controller, use proper fuses in wiring. Please do not hesitate to contact the professions if you need help with fuse sizing.
Always keep children away from this device.
Be certain to use the correct gauge of wire, see below for a table of recommended wire size for various current loads.

Solar Input Current

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5A

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10A

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20A

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30A

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40A

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60A

---|---|---|---|---|---|---

Wire Cross Section Area (mm²)

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1.5

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2.5

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5

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8

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10

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12

Wire AWG

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15

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13

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10

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8

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7

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6

Product Features

Thank you for choosing our products. This MPPT solar charge controller is a device for solar charge regulation and direct current output load control. This device is mainly used in small and medium sized off-grid solar power systems.

These MPPT charge controllers have features as follows:

By continuously checking solar panel power output changes, the controllers employ multiple MPPT charge algorithms in combination to boost charging efficiency in different weather and temperature conditions.
Built-in buffer, allows max 25% exceeding rated power input.
Charging modes available for most common deep-cycle battery types in the market, including AGM (sealed lead acid batteries), GEL, Flooded, and Lithium.
Allows mobile phone APP operation for monitoring and parameters settings, with connection of external blue tooth communication module (optional accessory, not in the standard package list).
Auto recognition of 12V/24V battery system voltage by M2420N/M2430N/M2440N models; auto recognition of 12V/24V/36V/48V battery system voltage by M4860N model. Lithium battery excluded from this feature.
Supports recording of system running data including power generated and power utilized for up to 300 days, compatible with monitoring App through IOS and Android.
We have built-in BT communication module in this controller and we provide APP PVChargePro for mobile phone monitoring and operation.You can search”PVChargePro”and download the APP at IOS APP Store and Google Play Store.
Provides multiple load control mode options for light based, time based and manually adjusted scenarios. Low no-load loss.
Industrial grade design with reverse polarity protection for solar panels, battery.

Product Features

Thank you for choosing our products. This MPPT solar charge controller is a device for solar charge regulation and direct current output load control. This device is mainly used in small and medium sized off-grid solar power systems. These MPPT charge controllers have features as follows:

By continuously checking solar panel power output changes, the controllers employ multiple MPPT charge algorithms in combination to boost charging efficiency in different weather and temperature conditions.
Built-in buffer, allows max 25% exceeding rated power input.
Charging modes available for most common deep-cycle battery types in the market, including AGM (sealed lead acid batteries), GEL, Flooded, and Lithium.
Allows mobile phone APP operation for monitoring and parameters settings, with connection of external blue tooth communication module (optional accessory, not in the standard package list).
Auto recognition of 12V/24V battery system voltage by M2420N/M2430N/M2440N models; auto recognition of 12V/24V/36V/48V battery system voltage by M4860N model. Lithium battery excluded from this feature.
Supports recording of system running data including power generated and power utilized for up to 300 days, compatible with monitoring App through IOS and Android.
We have built-in BT communication module in this controller and we provide APP PVChargePro for mobile phone monitoring and operation.You can search“PVChargePro”and download the APP at IOS APP Store and Google Play Store.
Provides multiple load control mode options for light based, time based and manually adjusted scenarios. Low no-load loss.
Industrial grade design with reverse polarity protection for solar panels, battery.

Device Diagram
M2420N & M2430N & M2440N & M4860N

device diagram

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Description

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Description

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1

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LCD Display Screen

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6

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DC Load Terminals

2

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Function Key ([SET], [UP], [DOWN], [ESC])

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7

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RS485 Communication Port

3

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External Temperature Sensor Terminal

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8

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LED Indicator (PV, BAT, LOAD, FAULT)

4

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Solar Terminals

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9

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Installation Mounting Holes

5

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Battery Terminals

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Mounting Instruction

cold air
Step 1
Find a cool, dry and weather safe location for installation.

Step 2
Mark the controller’s mounting holes on the mounting surface.

Step 3
Drill holes in the marked mounting hole location.

screw pilots
Step 4
Insert pilot screws in the mounting hole.

Step 5
Fasten the controller into the pilot screws.

Step 6
Continue to wire battery, solar, DC load and other accessories to the controller.

Wire Connection Sequences

temperature sensor

During installation of your MPPT controller, please follow the order of connection below:

Connect the positive battery wire followed by the negative battery wire.
Make sure your solar panels are fully covered to prevent electrical shock.
Connect the positive solar array output wire followed by the negative solar array output wire.
Connect DC load wires to the DC load output (if applicable).
Connect the external temperature sensor to its terminal shown above.
Download APP PVChargePro and turn on the BT function in the mobile phone. Testing the APP function with the controller.
06

LED Light Signal Interpretation Chart

LED Name

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LED Display

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Signal Indication

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PV

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Off

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Solar Input Not Charging

*PV LED is generally off during nighttime.

Double Flash

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Solar Input Charge Detected

Single Flash

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Solar Input Reverse Polarity

Steady On

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MPPT Charge Mode

Slow Flash

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In Equalize/Boost/Float Charge

BATTERY

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Single Flash

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Battery Input Reverse Polarity

Fast Flash

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Battery Over Voltage

Slow Flash

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Battery Over Discharged

Steady On

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Battery On

LOAD

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Off

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No DC Load Connected/Load Off

Fast Flash

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DC Load Short Circuit

Steady On

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DC Load On

FAULT

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Off

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No Errors

Steady On

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System Error – Check Error Code

LED Flash Rhythm Chart

Flash Status

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Indication

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Description

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Steady On

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on
off

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LED light on.

Off

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on
off

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LED light off.

Fast Flash

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on
off

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LED light blinks at frequency of 2Hz (twice every second).

Slow Flash

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on
off

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LED light blinks at frequency of 0.5Hz (once every two seconds).

Single Flash

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on
off

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LED light blinks for 0.1 second after every 2 seconds.

Double Flash

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on
off

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LED light blinks for 0.1 second twice after every 4 seconds.

LCD Display Interface Overview

charge status

LCD Display Interface

Display Section

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Display Layout

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Charge Status

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Charge Mode & Parameter

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Active Functions

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LCD Status Information

Status Icon

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Indication

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Status

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Description

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Solar Charge Indication

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Flowing

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Solar Power Charging Battery

Off

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Solar Power Not Charging Battery

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DC Load

Indication

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Flowing

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DC Load Drawing Power

Off

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DC Load Off

MPPT

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Charge Mode

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Steady On

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MPPT Charge Mode

BOOST

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Boost Charge Mode

FLOAT

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Float Charge Mode

Off

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Not Charging

CHG_V

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Voltage Setting

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On

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Setting Charge Voltage

Off

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Charge Voltage Has Been Set

LDV_V

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Over Discharge Volt Settings

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On

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Setting Discharge Voltage

Off

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Discharge Voltage Has Been Set

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Solar Icon

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Steady On

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Daylight Detected

Off

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No Daylight Detected

Fast Flash

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Solar System Over Voltage

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Battery Icon

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Steady On

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Battery Connected and Functional

Off

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No Battery Connection

Fast Flash

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Battery Over-Discharged

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Load Status

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Flash

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DC Load Short Circuit or Over-Load

ON

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Load On

OFF

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Load Off

Key Functionality Chart

Function Key

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System Mode

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Input

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Input Function

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View Mode

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Short Press

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Enter SET mode

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View Mode

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Short Press

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View Previous Page

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View Mode

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Short Press

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View Next Page

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View Mode

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Short Press

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DC Load On/Off
(Manual Control Program Only)

Function Key

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System Mode

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Input

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Input Function

---|---|---|---

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Set Mode

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Long Press

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Save Data & Exit SET Mode

Short Press

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Next Setting

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Set Mode

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Short Press

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Increase Parameter Value

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Set Mode

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Short Press

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Decrease Parameter Value

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Set Mode

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Short Press

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Exit SET Mode Without Saving

LCD Display Rules & Cycles

Pre start-up display cycle when the MPPT controller turns on, this usually last several seconds while controller detects operating environment.

screen display

The battery voltage view will be displayed by default. Use the up and down arrow keys to cycle through different views. The battery voltage view will resume upon 30 seconds of inactivity. The error code view will be displayed when an error is detected.The backlight in the screen will be on for 20 seconds with any button operation.

Setting Battery Mode

Enter SET mode by pressing the Setting key in any view page other than Load Mode. Use the up and down arrow keys to select battery mode, then long press Setting key to save.

setting key

Abbreviations

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Battery Types

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Description

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FLD

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Flooded Battery

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Auto-recognition with default parameters set for each type of batteries.

SEL

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Sealed/AGM Battery

GEL

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Gel Battery

LI

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Lithium Battery

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Some parameters can be customized.

USE

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Advanced User Mode

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Most parameters can be customized.

Advanced Battery Settings

In Lithium or User mode, short press the Setting key again to cycle through each parameter view. Use the up and down arrow key to adjust parameter value, then long press Setting key to save.

For Battery Type: Li

battery type

For Battery Type: USER

battery user

Load Mode Settings

Enter Load SET Mode by pressing the Setting key in Load Mode view only. Use the arrow key to cycle through load modes before long pressing SET to save and exit. Short pressing SET will exit without saving.

load setting

Mode

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Definition

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Description

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0

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Daylight Auto-Control

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DC load turns on when no daylight is detected.

1~14

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Daylight On/Timer Off

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DC load turns on when no daylight is detected. DC load turns off according to timer.

15

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Manual Mode

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DC load turns on/off by pressing the Return key.

16

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Testing Mode

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DC load turns on and off in a quick succession.

17

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Always On

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DC load stays on.

Error Code Chart

Code

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Error

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Description & Quick Troubleshoot

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E00

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No Error

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No action needed.

E01

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Battery

Over-discharged

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Battery voltage is too low.

DC load will be turned off until battery re-charges to recovery voltage.

E02

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Battery Over-voltage

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Battery voltage has exceeded controller limit.

Check battery bank voltage for compatibility

with controller.

E04

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Load Short Circuit

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DC load short circuit.

E05

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Load Overload

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DC load power draw exceeds controller capability. Reduce load size or upgrade to a higher load capacity controller.

E06

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Overheating

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Controller exceeds operating temperature limit. Ensure the controller is placed in a well-ventilated cool, dry place.

E08

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Solar Over-amperage

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Solar array amperage exceeds controller rated input amperage.

Decrease the amperage of solar panels connected to the controller or upgrade to a higher rated controller.

E10

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Solar Over-voltage

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Solar array voltage exceeds controller rated input voltage.

Decrease the voltage of solar panels connected to the controller.

E13

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Solar Reverse Polarity

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Solar array input wires connected with reverse polarity. Disconnect and re- connect with correct wire polarity.

E14

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Battery Reverse

Polarity

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Battery connection wires connected with reverse polarity. Disconnect and re- connect with correct wire polarity.

Controller Specification

The variable “n” is adopted as a multiplying factor when calculating parameter voltages, the rule for “n” is listed as: if battery system voltage is 12V, n=1; 24V, n=2; 36V, n=3; 48V, n=4. For example, the equalize charge voltage for a 12V FLD (Flooded) battery bank is 14.8V1=14.8V. The equalizing charge voltage for a 24V FLD (Flooded) battery bank is 14.8V2=29.6V.

Parameter Value

Model No.

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M2420N

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M2430N

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M2440N

|

M4860N

System Wiring Grounded

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