Hard to say. If you throw it in the sun, it will be filled.
The voltage of the 5V solar panel is not 5V, but floating. Under the sun, the solar panel can produce enough voltage and current to charge the cell phone, and if the time is long enough, it can do so. definitely be fully charged.
Many people are hesitant to leave their cell phones and solar panels in the sun and move them indoors. The conversion efficiency of solar panels is very low and the output current is very small, which cannot achieve the desired goal. loading.
Why can't the 5V solar panel drive the small motor? Is it because the panel doesn't meet specifications or is it a problem with the small motor? What should I do ?
1. Increase the area of the battery board and increase the output voltage, preferably above12 V.
2. Change the battery panel connection method. Parallel connection is series connection, which increases the output voltage, but the output current is also reduced and the total output power remains unchanged.
3. Add a DC-DC conversion module to convert the voltage of around 12V into a stable 5V DC output.
4. The output voltage of the solar cell is closely related to the intensity of light. When the light is strong, the output voltage is high, and the output current is also large when the light is dim. the output voltage and current decrease simultaneously. To ensure stable output, it is usually necessary to configure a DC-DC voltage stabilization device and a suitable battery.
The structure of solar panels
1. The role of tempered glass is to protect the main body of energy production (such as cells). IslandThere are requirements for its selection of light transmission. , and the light transmittance should be high (generally above 91%).
2. EVA is used to bond and fix tempered glass and the main power generation body (such as battery cells). The quality of the transparent EVA material directly affects the lifespan of the component to which the EVA is exposed. the air is prone to aging and yellowing, which affects the light transmission of the module, thereby affecting the power generation quality of the module. In addition to the quality of the EVA itself, the module manufacturer's lamination process also has a big impact. For example, the bonding degree of EVA is not up to standard, and EVA is bonded to tempered glass and backplanes. Insufficient strength will cause premature aging of EVA and affect the service life of components.
3. The main function ofcells 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 the consumption and costs of the cells are high, but the photoelectric conversion efficiency is also high, which makes them suitable for power generation under the outdoor sunlight. Thin-film solar cells have relatively high equipment costs.
4. EVA works as above, primarily bonding and encapsulating the power generation body and backplane.
The solar cell voltage is a static voltage. Once connected to the circuit, the internal resistance of the panel itself and the resistance of the load will limit the current intensity toa certain upper limit. limit, which means that the power is not enough. Your motor requires a relatively large current and the battery power is not enough, so it is normal that the battery cannot support it. Simply connect a few battery panels in parallel.