1. Product Introduction
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1.1 Overview
The controller employs the industry-leading PowerCatcher maximum power point tracking technique
to track the maximum energy of the solar panel. The MPPT technique enables the controller to quickly and
accurately track the maximum power point of the solar panel in any environment and obtain the maximum
energy of the solar panel in real time. This can significantly improve the energy utilization of the solar
system. It is widely used in off-grid PV systems to manage the work of solar panels and batteries, and
serves as the core control component of off-grid PV systems. The controller comes with complete
electronic fault detection and protection functions, which can minimize the damage of product
components due to installation errors and system failures.
1.3 Appearance and Interfaces
1.2 Features
With the PowerCatcher MPPT technique.
It enables full power charging and discharging.
Parallel charging is supported.
Active output voltage stabilization ensures good lithium battery activation.
Temperature compensation is available.
Several battery types can be preset.
LCD is equipped for real-time data interaction.
Complete protections are provided, including over-voltage, over-current, overload, over-temperature,
short-circuit and reverse polarity protections.
Natural heat dissipation and heat dissipation by fan are optional.
It supports Modbus protocol.
Figure 1-1 Controller Appearance and Interfaces
Name
Solar panel anode interface
Solar panel cathode interface
Battery anode interface
Battery cathode interface
Load anode interface
Load cathode interface
Temperature sensor interface
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RS485 isolated communication interface
Charge indicator
Battery indicator
Load indicator
Fault indicator
LCD screen
Buttons
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Maximum Power Point Tracking (referred to as MPPT) system is an advanced charging technique that
enables solar panel to deliver more power by regulating the operating state of the electrical modules. Due
to the nonlinearity of solar array, there is a maximum energy output point (maximum power point) of the
array on its curve. Traditional controllers (switch mode charging technology and PWM charging
technology) are unable to maintain charging the battery at this point, and therefore unable to obtain the
maximum energy of the panels. But, the solar controllers with MPPT control technique can always track the
maximum power point of the array to obtain the maximum energy to charge the battery. Take a 12V
system as an example. The peak voltage (Vpp) of the solar panel is around 17V but the battery voltage is
around 12V. So, for general charge controllers, the solar panel outputs a voltage of around 12V during
charging and does not output its maximum power. MPPT controller can overcome this problem. It
constantly adjusts the input voltage and current of the solar panel to achieve the maximum input power.
Compared with traditional PWM controller, the MPPT controller can maximize the power of the solar panel,
so that it can provide a larger charging current. Generally, the MPPT controller can increase the energy
utilization by 15% to 20% compared with the PWM controller.
2. MPPT Technique Introduction
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