mppt charge controller Solar Battery Control Box

Off Grid Solar Battery Control Box is a key component of the off-grid solar power system, which is mainly used to manage and control the charging and discharging process of the battery, ensure the stable operation of the system, and prolong the service life of the battery. Here's the details:

Key features:
Charge/discharge control: Series pulse-width modulation (PWM) or maximum power point tracking (MPPT) technology can be used. PWM charges the battery by automatically changing the pulse current of the duty cycle, allowing the battery to be fully charged more safely and quickly. MPPT technology tracks the maximum power of the solar panels in real time for more efficient charging. Some control boxes also have three-stage charging control (fast charging, uniform charging, and floating charging) to improve the energy storage efficiency of the battery.
Battery protection: It has the function of overcharge and over-discharge protection to prevent the battery from being damaged due to abnormal power. At the same time, it may also provide reverse connection protection, lightning protection, photovoltaic current limiting, load overload and short circuit protection, etc., to reduce the damage to the battery caused by external factors and circuit failures.
Condition monitoring and display: Some control boxes have a SOC (state of charge) calculation function that accurately displays the real-time capacity of the battery. It can also display parameters such as photovoltaic input voltage/current, AC output voltage/current, etc., through the LCD screen, etc., which is convenient for users to understand the operating status of the system. Some high-end products also have the function of photovoltaic power generation statistics, which can view the daily, monthly and total power generation.
Working principle: When there is light, the solar panel generates electric energy, and the battery is charged after being processed by the control box, and the control box adjusts the charging mode and current size according to the battery power state. When there is no light, the battery discharges to the load, and the control box monitors the battery voltage, and when the voltage drops to the over-discharge protection value, the discharge circuit is cut off to prevent over-discharge.
Structural composition: It usually includes control circuits, display panels, terminal blocks and other parts. The control circuit is the core, consisting of components such as processors, electronic switches (e.g., IGBTs/MOSFETs), and is responsible for various control and protection functions. The display panel is used to display the relevant parameters. Terminal blocks are used to connect devices such as solar panels, batteries, and loads to ensure a stable circuit connection.
Type: According to the charging control technology, it can be divided into PWM type and MPPT type. PWM type technology is mature, inexpensive, suitable for small systems; The MPPT type has better performance and higher efficiency, and is mostly used in large-scale off-grid systems.

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