The solar energy market is now mixed, true, false and false, today to explain to you, how to buy the right solar lamps.

First, the composition of solar lamps.

1, solar panels, divided into monocrystalline silicon and polysilicon two, monocrystalline silicon conversion efficiency is high, polycrystalline silicon conversion efficiency is lower than monocrystalline silicon. But when it comes to power, 100W monocrystalline silicon and 100W polysilicon are a concept, but the volume of polysilicon will be larger.
2, battery energy storage part, divided into traditional lead-acid colloid maintenance-free battery and lithium battery two.
Lead-acid batteries, conventional batteries, life cycle is not as good as lithium batteries, while having memory, can not discharge 100%, only 75% discharge depth, now not recommended.

Lithium batteries are divided into lithium iron phosphate batteries and ternary lithium batteries, lithium iron phosphate batteries must be more expensive than ternary lithium. The use is the same, and ternary lithium batteries are recommended here.

Focus on why iron lithium is not recommended, because the price of iron lithium is 1/3 higher than ternary lithium, as long as lithium iron is used for solar energy, it is used for dismantling batteries, old batteries, only with dismantling batteries, in order to ensure the price, life is basically not guaranteed. Therefore, you see that lithium iron is cheaper than ternary lithium, you know that it must be used to remove the machine battery. The upstairs of Xiaobian is a large factory specializing in dismantling lithium iron phosphate batteries, which is purchased in large quantities from abroad, and then dismantled and re-divided and paired, and then made into solar lamps and lanterns to the market.

3, controller, different manufacturers, different quality. Big brands will also have problems, mainly depending on the program mastery of the assembly plant.

4, lamp shell, this water is very large. Small series of this lamp, and now die-cast aluminum materials and ABS plastic materials. Different people have different opinions. Die cast better, typhoon resistant.
Second, solar street lamp scheme classification.

1, steady light control time control scheme

The traditional scheme, always on, many manufacturers make an article here, after 1 to 2 hours of light, to the time control is adjusted to half power, and then bright for a while and then change the power, so that under the premise of hardware indicators are not up to standard, you can extend the life of the lamp.
Second, solar street lamp scheme classification.

1, steady light control time control scheme

The traditional scheme, always on, many manufacturers make an article here, after 1 to 2 hours of light, to the time control is adjusted to half power, and then bright for a while and then change the power, so that under the premise of hardware indicators are not up to standard, you can extend the life of the lamp.
2, 20~50W induction street lamp, this lamp is human body induction. The real power and configuration are increased, so that they can be used in rural areas where the battery life is required for a long time and the cost is low.
3, 20~80W conventional time-controlled light control street lamp, this lamp is a more commonly used product, but most manufacturers steal indicators. A little less solar panels, a little less batteries, big profits. Indicators can only be compared and tested, it is difficult to see with the naked eye, and the naked eye can see it, that is, the indicator is stolen.
4, 20~80W integrated lamps, this lamp is mostly used for engineering foreign trade exports, easy installation, fixed can be lit, saving the cost of manual installation.
Fourth, how to identify the quality of the product

1, compare the brightness, lighting time. The brightness is difficult to define with the naked eye, and only the integrating sphere can accurately measure the light efficiency. The brightness is generally compared with the naked eye.

2, using a stage, the basic unstable program can expose the problem in less than 1 month.

3. Open the battery box and look at the battery. Check the capacity. With the charger full, and then with a large load discharge, there is time, discharge power, you can calculate whether the battery capacity is the specified indicator. Now all the battery measurements are based on full discharge, and what tester is not accurate.

4, compare the size of solar panels, the basic size can also be used as a simple judge whether to steal indicators. Or against the solar energy, measure the current and voltage, basically you can calculate the power.

Five, unscrupulous manufacturers like to use tricks

1. Steal the concept

Praised the lamps are good, the battery is good, the solar panel is good, the big brand lamp beads are also divided into 369, etc., only suitable is good, and measured light efficiency with the integrating ball, you know it is not good. Battery iron lithium is very good, but most of the old battery dismantling machine battery, will not be better than ternary lithium, lithium battery protection plate protection, is not explosive. No matter how good the solar panel is, it is also the process and standard made by the factory, and the measured starting power is the positive solution.

2. Stealing metrics

The lamp index is very large, but the actual use is very small. It is difficult to see if it is not professional, and can only be detected with the cooperation of instruments or other manufacturers. Therefore, a penny a penny goods, the difference should pay attention to.

3. Step on your peers

Merchants say they are good, step on peer product quality. Don’t believe it easily, it is only true when measured. Many peers have low prices, which is actually stealing indicators. Basic manufacturers do batteries, and the cost can only be pulled down by stealing indicators. So don’t fall for self-congratulatory claims.

In summary, a good lamp can only be tested by time. Try to choose a professional manufacturer, do not look at the scale, to see whether the boss understands the technology, or not to master the program, to make is the solar bomb oh.