Solar batteries function to store the electrical energy generated by the panels during sunshine during daylight hours. And we use this stored electrical energy during the absence of the sun in the evening. This idea is used in most off-grid photovoltaic systems For lighting poles, one or two batteries are often used.
As for the pumps, they usually do not need energy storage, and daytime irrigation is sufficient. And the car battery cannot be used in photovoltaic systems because the car battery will deteriorate after a short period because it is designed to give you a large amount of electrical charge in a short period. This period is the starting period of the engine rotation, and the rest of the time is charged by the dynamo in the car.
This is in contrast to solar energy batteries that are designed to be charged throughout the sunshine period
, then discharge their charge throughout the night, and can carry out the charging process in a long time and with a low current, as well as discharge the charge in a long time.
It can also be charged and discharged by up to 50% to live 3000 cycles, which is a very large number compared to a car battery that will not live more than 100 cycles when it is discharged by 50%.
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