Solar panels can be directly connected to batteries. The electrical energy generated by the solar panel can be instantly stored in the battery for use by electrical equipment. The function of the battery is to store electrical energy and stabilize voltage.
When using solar cells to charge the battery, the voltage of the solar cell should exceed the operating voltage of the battery by 20% to 30% to ensure normal battery charging.
For example, you should use 8-9V solar cells to charge 6V batteries, and you should use 15-18V solar cells to charge 12V batteries. < /p>
The main technical parameters of the battery are voltage and capacity. Voltage refers to the rated voltage of the battery, which is the normal operating voltage, generally 3V, 6V, 12V, 24V, 36V, etc.Capacity refers to the battery's ability to store electricity. Common batteries include 4AH, 6AH, 12AH, 20AH, 40AH, 60AH, 120AH, etc.
Detailed information
Composition of the solar panel and functions of each part:
(1) Tempered glass: Its function is to protect the main power generation body (such as battery cells), there are requirements for the selection of light transmittance:
The light transmittance should be high (generally greater than 91%);
(2) EVA:
Used to bond and fix the tempered glass and the main body of power generation (battery sheet). The quality of the transparent EVA material directly affects the. component life and is exposed to air. The EVA contained in it is easy to age and yellow, which affects the light transmission of the module and thus affects the power generation quality of the module.this in addition to the quality of the EVA itself. .
The lamination process of component manufacturers also has a big impact. For example, if the bonding degree of EVA is not up to standard and the bonding strength between EVA, tempered glass and backplane is insufficient, this will occur. cause premature aging of the EVA and affect the service life of the component.
(3) Cells: The main function is to produce electricity. The main market for power generation is crystalline silicon solar cells and thin-film solar cells, both of which have their own advantages and disadvantages.
Crystalline silicon solar cells have relatively low equipment costs, but high consumption and cell costs. However, the photoelectric conversion efficiency is also high and they are more suitable for generating electricity underoutdoor sunlight.
Thin film solar cells have relatively high equipment costs, but the consumption and battery costs are very low, but the photoelectric conversion efficiency is more than half of that of cells made of crystalline silicon, but the low light effect is very good, under ordinary light. Can also produce electricity, like solar cells in a calculator.
Baidu Encyclopedia - Solar Panels
To put it more simply, the two terms you mentioned are not very precise. To be precise, it is “photovoltaic solar modules and”. Photovoltaic solar cells. Photovoltaic modules are assembled and assembled by photovoltaic cells, and the cells are the basic components. Ultimately, the photovoltaic modules are installed on the roof to produce electricity, so they are subordinate.