Product Specifications

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Product Description

MPPT 40A 12/24V Solar Charger Controller (QW-SR- ML2440)

MPPT(Maximum Power Point Tracking) Solar charge controller capable of real-time detection of solar panel power voltage, and track the highest voltage and current values (VI), The maximum power output of the system in order to charge the battery.

Model	ML2420	ML2430	ML2440
Battery voltage	12V/ 24V
Max. solar panel voltage	100V (25°C), 90V (-25°C)
Charging current	20A	30A	40A
Discharging current	20A

Model	Rated charging current	Rated discharging current	Battery wire diameter  (mm2)	Load wire diameter (mm2)
ML2420	20A	20A	5	5
ML2430	30A	20A	6	5
ML2440	40A	20A	10	5

Exterior and Interfaces

 

 

No.	Item	No.	Item
1	Charging indicator	10	Battery "+" interface
2	Battery indicator	11	Battery "-" interface
3	Load indicator	12	Load "+" interface
4	Abnormality indicator	13	Load "-" interface
5	LCD screen	14	External temperature sampling interface
6	Operating keys	15	RS232 communication interface
7	Installation hole
8	Solar panel "+" interface
9	Solar panel "-" interface

  

This controller has 5 load operating modes which will be described below:

No.	Mode	Descriptions
0	Sole light control (nighttime on and daytime off)	When no sunlight is present, the solar panel voltage is lower than the light control on voltage, and after a time delay, the controller will switch on the load; when sunlight emerges, the solar panel voltage will become higher than the light control off voltage, and after a time delay, the controller will switch off the load.
1 to 14	Light control + time control 1 to 14 hours	When no sunlight is present, the solar panel voltage is lower than the light control on voltage, and after a time delay, the controller will switch on the load. The load will be switched off after working for a preset period of time.
15	Manual mode	In this mode, the user can switch the load on or off by the keys, no matter whether it's day or night. This mode is designed for some specially purposed loads, and also used in the debugging process.
16	Debugging mode	Used for system debugging. With light signals, the load is shut off; without light signals, the load is switched on. This mode enables fast check of the correctness of system installation during installation debugging.
17	Normal on mode	The energized load keeps outputting, and this mode is suitable for loads which need 24-hour power supply.

1 Connecting to external temperature sampling interface

2 Connecting communication cable

3 Connecting power cable

4 Power on

 

Protection Functions

• Waterproof 

Waterproof level: IP32 

• Input power limiting protection 

When the solar panel power exceeds the rated power, the controller will limit the solar panel power under the rated power so as to prevent excessively large currents from damaging the controller and enter into current-limited charging. 

• Battery reverse connection protection 

If the battery is reversely connected, the system will simply not operate so as to protect the controller from being burned. 

• Photovoltaic input side too high voltage protection 

If the voltage on the photovoltaic array input side is too high, the controller will automatically cut off photovoltaic input. 

• Photovoltaic input side short-circuit protection 

If the photovoltaic input side gets short-circuited, the controller will halt charging, and when the short circuit issue gets cleared, charging will automatically resume. 

• Photovoltaic input reverse-connection protection

When the photovoltaic array is reversely connected, the controller will not break down, and when the connection problem gets solved, normal operation will resume. 

• Load overpower protection

When the load power exceeds the rated value, the load will enter into delay protection. 

• Load short-circuit protection

When the load is short-circuited, the controller can implement protection in a quick and timely manner, and will try to switch on the load again after a time delay. This protection can be carried out up to 5 times a day. Users can also manually address the short circuit problem when finding the load is short-circuited via the abnormality codes on the system data analysis page. 

• Reverse charging protection at night

This protection function can effectively prevent the battery from discharging through the solar panel at night.

• TVS lighting protection.

• Over-temperature protection 

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Packaging and Shipping

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Packaging details

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