The current generated by the solar panels is measured directly with an ammeter.
The output current of solar panels is different according to different light intensities. To know its current in real time, it is best to use an ammeter to measure it. Additionally, there is the so-called rated current, which is measured under standard light intensity. This will be indicated on a label when purchasing solar panels.
See how long it takes to fully charge the battery. Assuming it takes 4 hours to fully charge, then 48/4 = 12 A is required per hour, which means the solar panel charging current is 12 A. ; we know that 18V solar panels are usually used when charging a 12V battery, the power of the solar panel is the voltage.
Principle of energy production
The solar cell is a devicewhich reacts to light and can convert light energy into electricity. There are many types of materials that can produce photovoltaic effects, such as: monocrystalline silicon, polycrystalline silicon, amorphous silicon, gallium arsenide, copper selenium indium, etc. Their principles of energy production are basically the same. Today, crystalline silicon is used as an example to describe the photovoltaic power production process. Crystalline P-type silicon is doped with phosphorus to obtain N-type silicon, forming a P-N junction.
When light irradiates the surface of the solar cell, part of the photons are absorbed by the silicon material; the energy of the photons is transferred to the silicon atoms, causing the electrons to transition and become free electrons. accumulate on both sides of the P-N junction to form a potential difference, loWhen the external circuit is connected, under the action of this voltage, a current will flow through the external circuit to produce a certain output power. The essence of this process is: the process of converting photon energy into electrical energy.
Hello: ——★The output current of the solar panel is related to the rated voltage. The rated output current of a 12V/100W solar panel is: 100W÷12V＝8.33A; The rated output current of a 24V/100W solar panel is: 100W ÷ 24V＝4.17A.