Shenzhen Hehejin Industrial Co., LTD.

PowMr 20A 30A 40A 12V/24V Auto MPPT Solar Charge Controller PowMr 20A 30A 40A 12V/24V Auto MPPT Solar Charge Controller

This product can keep monitoring the solar panel's generating power and tracking the highest voltage and current values (VI) in real time, enabling the system to charge the battery in maximum power. It's designed to be used in off-grid solar photovoltaic systems to coordinate operation of the solar panel, battery and load, functioning as the core control unit in off-grid photovoltaic systems.

  • Brand : PowMr
  • Product Name : ML2420
Current Optional:
  • 20A
  • 30A
  • 40A
WHS Location:
Share this:



  • With the advanced dual-peak or multi-peak tracking technology, when the solar panel is shadowed or part of the panel fails

  • resulting inmultiple peaks on the I-V curve, the controller is still able to accurately track the maximum power point.

  • A built-in maximum power point tracking algorithm can significantly improve the energy utilization efficiency of

  • photovoltaicsystems,and raise the charging efficiency by 15% to 20% compared with the conventional PWM method.

A combination of multiple tracking algorithms enables accurate tracking of the optimum working point on the I-V curve in anextremelyshort time.The product boasts an optimum MPPT tracking efficiency of up to 99.9%.

  • Advanced digital power supply technologies raise the circuit's energy conversion efficiency to as high as 98%.

  • Charging program options are available for different types of batteries including gel batteries, sealed batteries,

  • open batteries, lithiumbatteries, etc.The controller features a limited current charging mode.

  • When the solar panel power exceeds a certain level and the chargingcurrent islarger than the rated current, the

  • controller will automatically lower the charging power and bring the charging currentto the rated level.Instantaneous

  • large current startup of capacitive loads is supported.

  • Automatic recognition of battery voltage is supported.

  • LED fault indicators and an LCD screen which can display abnormality information help users to quickly identify system faults.

  • Historical data storage function is available, and data can be stored for up to a year.

  • The controller is equipped with an LCD screen with which users can not only check device operating data and statuses, but also modifycontroller parameters.

  • The controller supports standard Modbus protocol, fulfilling the communication needs of various occasions.

  • The controller employs a built-in over-temperature protection mechanism. When temperature surpasses the set value, the

  • chargingcurrent will decline in linear proportion to the temperature so as to curb the temperature rise of the controller,

  • effectively keeping thecontroller from being damaged by overheat.

  • Featuring a temperature compensation function, the controller can automatically adjust charging and discharging parameters in order toextend the battery's service life.

  • TVS lighting protection.

Introduction to Maximum Power Point Tracking Technology

Maximum Power Point Tracking (MPPT) is an advanced charging technology that

enables the solar panel to output more power by adjusting the electric module's

operating status. Due to the nonlinearity of solar arrays, there exists a maximum

energy output point (maximum power point) on their curves. Unable to

continuously lock onto this point to charge the battery, conventional controllers

(employing switching and PWM charging technologies) can't get the most of the

power from the solar panel. But a solar charge controller featuring MPPT

technology can continuously track arrays' maximum power point so as to get the

maximum amount of power to charge the battery.

Take a 12V system as an example. As the solar panel's peak voltage (Vpp) is

approximately 17V while the battery's voltage is around 12V, when charging with a

conventional charge controller, the solar panel's voltage will stay at around 12V,

failing to deliver the maximum power. However, the MPPT controller can

overcome the problem by adjusting the solar panel's input voltage and current in

real time, realizing a maximum input power.

Compared with conventional PWM controllers, the MPPT controller can make the

most of the solar panel's max. power and therefore provide larger charging current.

Generally speaking, the latter can raise the energy utilization ratio by 15% to 20%

in contrast with the former


Technology Parameter





System voltage


No-load loss

0.7 W to 1.2W

Battery voltage

9 to 35

Max. solar input voltage

100V (25°C), 90V (-25°C)

Max. power point voltage range

Battery voltage +2V to 75V

Rated charging current




Rated load current


Battery wire diameter(mm2)




Load wire diameter (mm2)




Max. capacitive load capacity


Max. photovoltaic system input power

260W/ 12V

400W/ 12V

550W/ 12V

520W/ 24V

800W/ 24V

1100W/ 24V

Conversion efficiency

≤ 98%

MPPT tracking efficiency

> 99%

Temperature compensation factor

-3.0mv/ °C/ 2V (default)

Operating temperature

-35°C to +45℃

Protection degree


Communication method



≤ 3000m

Product dimensions




Video Center


Contact Us