How to know the quality of Solar Road Studs?

Nowadays, many people like to buy Solar Road Studs and place them in the yard of their own garden, which saves electricity and is very convenient to install, no wiring, just install a few screws. However, there are all kinds of Solar Road Studs on the market, some look exactly the same, but the price is almost the same, why is this? How can I know the quality of Solar Road Studs? In my opinion, there may be three aspects that determine Solar Road Studs The pros and cons:
1: Solar Road Studs charging capacity, the capacity of photovoltaic panels is directly related to the charging capacity, the capacity of photovoltaic panels refers to the power of photovoltaic panels, which is equal to the efficiency of photovoltaic panels and the area of ​​photovoltaic panels, that is, Solar Road Studs photovoltaic panels The capacity of the solar panel is only one aspect, the efficiency is not high, or the silicon wafer has dead chips, then it is meaningless. At present, the efficiency of the Solar Road Studs photovoltaic panels on the market is about 120W-180W/square, and some manufacturers choose B grade silicon wafers. Packaging, the efficiency is not high, although the photovoltaic panel looks large, the actual output is not high.

2: Solar Road Studs power storage capacity, the only indicator of power storage is the battery, which is the deepest place in the industry, because the appearance is the same, the capacity is completely different, and ordinary consumers cannot measure the capacity of the battery at all. For Road Studs batteries, the factors that determine whether the battery is good or bad are roughly divided into the following points:
a. The actual capacity of the Solar Studs capacitor, maybe the battery you see like 32650 is a 5AH section, but according to the results of the market spot check, the actual capacity is 3AH-5AH section, even the theoretically designed capacitor can not reach , which is why many Solar Studs do not light up after two or three hours, or are fully charged after three or four hours of charging, which is caused by insufficient capacity.

b. Internal resistance of Solar Studs resistor: Solar Studs battery is a battery pack composed of multiple cells, and the two resistors are generally connected in parallel. , First of all, it will cause insufficient output, which will seriously affect the life of the battery. That is to say, no matter how good the battery is, if it is not assembled in strict capacity, it will become the result of "three monks have no water to drink".
c. Battery protection, in order to save costs, many Solar Studs batteries are not equipped with guard plates to protect charging and discharging, it is very easy to overcharge or overdischarge, and finally the battery enters a dead state and cannot work normally, which is why many Solar Studs cannot An important reason why it cannot be charged after a period of use.
3: The waterproof construction process of Solar Studs.

After all, Solar Studs is a kind of outdoor lamps. In the sun and rain environment, the waterproof and moisture-proof technology of Solar Studs is very important. As far as the current Solar Studs manufacturers are concerned, many manufacturers do not have the production experience of outdoor Solar Studs. The production capacity is not strong enough, and the waterproofing is not done well. It is easy to enter the water when it rains, causing damage to the internal components. More importantly, it is moisture-proof. Many manufacturers do not care. I do not know that in a humid environment, components will rust, or outdoor mosquitoes will invade hands. , secreting substances in it, directly corroding the control board or PCB, etc., and finally causing the Solar Studs to not work properly.