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Basic composition of independent solar cell system

2021-09-08 18:48:27

The independent solar cell system is composed of solar cell array, DCDC converter, battery pack, DCAC inverter and AC / DC load. If the load is DC, DCAC inverter can not be used. The DCDC converter transmits the electric energy converted by the solar cell array to the battery pack for storage when the sunlight is insufficient. The energy of the battery pack directly supplies power to the DC load or supplies power to the AC load through the DCAC converter.


The main components of the independent solar power generation system include: solar cell module and support, maintenance free lead-acid battery, charge discharge controller, inverter (used when AC load is used), various special AC and DC lamps, distribution cabinet and cables, etc. The control box shall be made of good material, beautiful and durable; Maintenance free lead-acid battery and charge discharge controller are placed in the control box. Valve regulated sealed lead-acid battery is also called "maintenance free battery" because it has little maintenance, which is conducive to reducing the maintenance cost of the system; The charge discharge controller has the functions of optical control, time control, overcharge protection, over discharge protection and reverse connection protection. For example, for an independent solar street lamp system, its working principle is: the solar panel receives solar radiation energy during the day and converts it into electric energy, which is stored in the battery through the charge discharge controller. At night, when the external illumination gradually decreases to a certain value, the opening voltage of the solar panel reaches the corresponding value, and the charge discharge controller acts after detecting this voltage value, The battery supplies power to the lamps. After the battery is discharged to the set time, the charge discharge controller acts and the battery discharge ends. The main function of the charge and discharge controller is to protect the battery. The charge and discharge conditions and the lighting time of street lamps can be set through the controller according to the needs of users. The battery discharge is DC. If AC power is required, an inverter that converts DC power into AC power needs to be added.

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