Solar Controller 30/40 Amper

MPPT solar charge controller is designed to automatically charge 12V and 24V sealed and vented lead acid batteries from silicon based PV modules such as thin film, monocrystalline and polycrystalline. It has a built in Low Voltage Disconnect (LVD) configurable as a Dusk-to-Dawn switching. It can be connected to a PC for monitoring the full system parameters. It is a high quality product that offers the best price / performance ratio in the industry.




• Built-in MPPT algorithm (Maximum Power Point Tracking), that promotes energy utilization efficiency of solar system. The charging efficiency is 20%~25% higher than PWM mode.

It can find out the best working point of I-V curve within 1 minute. The MPPT efficiency could reach to 99,9%.

Adopting advanced digital power supply techniques which makes the energy conversion efficiency reach up to 97%.

Four charging stages: MPPT - equalizing charge - boosting charge - floating charge.

There is current-limiting charging mode. When the power of solar panel is oversized and charging current exceeds the rated current, the controller will lower charging power automatically, which enable the system to work under the rated charging current.

Has a fault code  indication, it helps users to confirm the system fault.

Various load control methods. Recognize day and night automatically.

• With temperature compensation function to adjust the charge and discharge parameters automatically, this could extend the life of the battery.

Various system protection functions. Including over-charge, over-discharge, over-load, over-heat, battery-reverse connection, short-circuit protection and TVS lightning protection etc.


Note: ML4830-LI and ML2440-LI can be used for lithium battery charging and discharging management

Technical specification

Parameters Value
Model ML4830/ML4830-LI ML2440/ML2440-LI
System Voltage 12V/ 24V/ 36V/ 48V 12V/ 24V auto
Max. Solar Input Voltage 150 V 150 V
Charging Current 30 A 40 A
Discharging Current 20 A 20 A
Battery Voltage 9 ~ 35 V 9 ~ 70 V
No-Load Loss 0,7 W – 1,2 W
Max. Capacitive Load Capacity 150 V 150 V
Max. Solar Input Voltage 10000 uF
Max. Solar Energy Input Voltage < 150 V
Communication Mode RS485, RS232
PV System Max. Input Power 520 W / 12 V 400 W / 12 V
800 W / 24 V
1040 W / 24 V 1200 W / 36 V
1600 W / 48 V
Transfer Efficiency ≤ 98,80%
MPPT Tracking Efficiency > 99,90%
Temperature Compensation Coefficient -3mv/°C / 2 V (Default)
Over-Temperature Protection Yes
Working Temperature -35°C – +45°C
Protection Level IP32
Weight 2,30 kg
Max. Wiring Dimension 25 mm²
Altitude ≤ 3000 m
Product Dimension 226 x 182 x 81 mm

We reserve the rights to make alterations to the design of product in the interests of technical progress without notice.



• 3 years for product defects.


Installation Safety Guide

• Only qualified personnel should install or perform maintenance;
• Be aware of dangerous high DC voltage;
• Do not damage or scratch the rear surface of the module;
• Do not handle or install modules when they are wet.