First, you need to determine how many volts your battery has and how much surface area your solar energy absorbing panel has. Only in this way can you determine how much energy your panel can absorb in an hour. ~~ Generally, 5.5V solar panels are used
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3.7V lithium polymer battery
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5V boost circuit board. ---charge cell phones.
If your solar panel has a voltage of 7-8V, it can be charged to 4.8V in one hour~~~
What types of solar panels can be divided
Black, blue.
Because this color is the effect of the anti-reflective film layer. Solar panels primarily absorb photons near the green wavelength in visible light. If the solar panel is blue, it means it reflects light of blue wavelength. Black, of course, is not reflective. So black is best, blue is second.
Solar panels are mainly divided into the following types:
1. Polycrystalline silicon solar cells The photoelectric conversion efficiency of silicon solar cells polycrystalline is reduced; About 12%.
2. Amorphous silicon solar cells consume very little silicon and use less energy. Its main advantage is that they can produce electricity in low light conditions. However, the main problem of amorphous silicon solar cells is that the photoelectric conversion efficiency is low, the international advanced level is about 10%, and it is not stable enough. Over time, its conversion efficiency decreases.
3. Monocrystalline silicon solar cells The photoelectric conversion efficiency of monocrystalline silicon solar cells is approx.ron 15%, the highest reaching 24%. It has the highest photoelectric conversion efficiency, but its production cost is so high that it cannot be widely used. Since monocrystalline silicon is typically encapsulated in tempered glass and waterproof resin, it is strong and durable, with a lifespan of typically up to 15 years and up to 25 years.
4. Multi-component compound solar cells refer to solar cells that are not made of single-element semiconductor materials. Semiconductor materials with multi-gradient energy band gaps can expand the range of the solar absorption spectrum, thereby improving the efficiency of photoelectric conversion.