12/24V 40A MPPT Solar Panel Charger Regulator with LCD (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.
|Battery voltage||12V/ 24V|
|Max. solar panel voltage||100V (25°C), 90V (-25°C)|
|Model ||Rated charging current ||Rated discharging current ||Battery wire diameter |
|Load wire diameter (mm2)|
|ML2420||20A ||20A ||5||5|
|ML2430 ||30A ||20A ||6||5|
|ML2440 ||40A ||20A ||10||5|
Exterior and Interfaces
This controller has 5 load operating modes which will be described below:
|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|| || |
|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 FunctionsWaterproof level: IP32
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.
- Input power limiting protection
If the battery is reversely connected, the system will simply not operate so as to protect the controller from being burned.
- Battery reverse connection protection
If the voltage on the photovoltaic array input side is too high, the controller will automatically cut off photovoltaic input.
- Photovoltaic input side too high voltage 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 side short-circuit 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.
- Photovoltaic input reverse-connection protection
When the load power exceeds the rated value, the load will enter into delay protection.
- Load overpower 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.
- Load short-circuit protection
This protection function can effectively prevent the battery from discharging through the solar panel at night.
- Reverse charging protection at night
- Over-temperature protection