How Do I Choose the Best Portable Solar Battery Charger?

Solar portable power, also known as solar-compatible portable power, it includes: solar panels, charge controllers, discharge controllers, mains charging controllers, inverters, external expansion interfaces and batteries. The photovoltaic portable power supply can work in both solar and ordinary power modes, and can switch automatically. Photovoltaic portable power supplies are widely used and are ideal power supply equipment for emergency activities, emergency travel, military, geological survey, archeology, schools, hospitals, banks, gas stations, comprehensive buildings, highways, substations, home camping and other outdoor activities or emergency power.

Solar Portable Power

1. Mains charging: Close the battery control switch, insert the charging cable into the mains charging socket in the correct way, connect the other end of the charging cable to the mains, close the mains charging switch, and start charging the battery in the device; solar charging : Close the battery control switch

Portable solar power is composed of solar panel, special storage battery and standard accessories. The first two are the key factors affecting the quality and performance of power products, which must be considered during the purchase process.

Solar Portable Power Solar Panel

There are three types of solar panels on the market, including monocrystalline silicon solar panels, polycrystalline silicon solar panels, and amorphous silicon solar panels.

Monocrystalline silicon solar cells are one of the more commonly used semiconductor cells for the production of solar power. Its production process has been finalized, and its stability and photoelectric conversion are very high. China's Shenzhou VII and Chang'e 1 both use single-crystal silicon solar cells, and their conversion rates can reach 40%. However, because the cost is too expensive, the conversion rate of monocrystalline silicon solar cells on the market is between 15% and 18%.

The cost of polycrystalline silicon solar cells is lower than that of single crystal solar cells, and it has better photosensitivity, and can be sensitive to sunlight and incandescent light. But the photoelectric conversion rate is only 11% -13%. With the development of technology, the efficiency is also improving, but the efficiency is still slightly inferior compared to single crystal silicon.

Amorphous silicon solar cells have the lowest conversion rate, the international advanced level is only about 10%, while the domestic is basically between 6% -8%, and it is not stable, often the phenomenon of sudden decline in conversion rate. Therefore, amorphous silicon solar cells are mostly used in weak electric light sources, such as solar electronic calculators and electronic clocks. Although the price is low, the price is not high.

In general, when choosing a portable solar power source, monocrystalline silicon and polycrystalline silicon should be the mainstay, and it is better not to choose amorphous silicon for cheap.

Battery for solar portable power supply

The special storage batteries for portable solar power on the market can be divided into lithium batteries and nickel-metal hydride batteries according to materials.

Lithium batteries can be recharged at any time and have no memory effect. Liquid lithium-ion batteries are lithium batteries commonly used in traditional mobile phones or digital cameras. In contrast, polymer lithium electronic batteries have more advantages, such as thinning, arbitrary area and arbitrary shape, and do not cause safety problems such as leakage and combustion explosion, so aluminum plastic can be used. The composite film manufactures the battery case, thereby increasing the specific capacity of the entire battery. As costs gradually decrease, polymer lithium-ion batteries will replace traditional liquid lithium-ion batteries.

The problem with nickel-metal hydride batteries is that both charging and discharging have a memory effect, and the efficiency is relatively low. Moreover, the voltage of each battery cell is lower than that of lithium-ion batteries, and is generally not used by portable solar power sources.

In addition, qualified portable solar power batteries will have overcharge, overload, and overvoltage and overcurrent protection functions. After the battery is fully charged, it will automatically shut down and no longer charge, and it will automatically cut off the power to protect the battery and electrical equipment to a certain extent.