• With the advanced dual-peak or multi-peak tracking technology, when the solar panel is shadowed or part of the
panel fails resulting in multiple 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
photovoltaic systems, 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 an extremely short 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, lithium batteries, etc.
• The controller features a limited current charging mode. When the solar panel power exceeds a certain level and the
charging current is larger than the rated current, the controller will automatically lower the charging power and bring
the charging current to 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 modify controller 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 charging current will decline in linear proportion to the temperature so as to curb the temperature rise of the
controller, effectively keeping the controller from being damaged by overheat.
• Featuring a temperature compensation function, the controller can automatically adjust charging and discharging
parameters in order to extend the battery's service life.
• TVS lighting protection.
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• 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.
• This product features an LCD screen which can dynamically display the operating status, operating parameters,
controller logs, control parameters, etc. Users can conveniently check parameters by the keys, and modify control
parameters to cater to different system requirements.
• The controller utilizes standard Modbus communication protocol, making it easy for users to check and modify
system parameters on their own. Besides, by providing free monitoring software, we give users the maximum
convenience to satisfy their varied needs for remote monitoring.
• With comprehensive electronic fault self-detecting functions and powerful electronic protection functions built inside
the controller, component damage caused by installation errors or system failures can be avoided to the greatest extent
possible.
RS232
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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.
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1.1 Product Overview
1. Product Introduction
1.2 Product Features
Battery "+" interface
Battery "-" interface
Load "+" interface
Load "-" interface
External temperature sampling interface
RS232 communication interface
1.3 Exterior and Interfaces
Definition
Transmitting terminal TX
Receiving terminal RX
Power supply grounding /Signal grounding
Power supply grounding /Signal grounding
Power supply positive
Power supply positive
No.
Fig. 1-1 Product appearance and interfaces
Charging indicator
Battery indicator
Load indicator
Abnormality indicator
LCD screen
Operating keys
Installation hole
Solar panel "+" interface
Solar panel "-" interface
No. No.
Item
Item
1.4 Introduction to Maximum Power Point Tracking Technology
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