Selection of solar lamps and lanterns precautions
Nowadays, many friends buy products directly online, but purchasing industrial products online requires professionals to identify good and bad, and there are many pits to avoid. Today, we will briefly talk about how to spend the proper budget and buy the right products.
First, we need to know what solar lamps and lanterns comprise.
The composition of solar lamps and lanterns
1, the light board (including lamp beads, aluminum substrate)
2, solar panels (divided into polycrystalline silicon and monocrystalline silicon)
3, lithium batteries (divided into lithium iron and ternary)
Secondly, we have to envision ourselves using the power.
Second, their use of power calculation (formula: P power = U voltage I current)
One, Lighting power
Two, Lighting time
Three, Rainy day duration
Suppose we want to use 30W lamps and lanterns, light up time for 8 hours a day, we can get.
30W * 8H = 240W (30W lighted 8 hours per day to derive the power consumption)
This way, we can get the storage battery pack capacity requirements that should be configured.
Generally below 20W using 3.2V lithium iron single string / 3.7V ternary single string battery pack, 20 to 40W more 9.6V (lithium iron three string) / 12.8V (lithium iron four string) / 11.1V (ternary three string) battery pack, more than 50W using 24V battery pack (not much to say here, because of the use of few), we Using 3 yuan 11.1V lithium battery pack to calculate.
240W / 11.1V = 21.62A, it is recommended to take an even integer value, the need for 11.1V / 22A battery pack.
Battery capacity out, and then calculate the power generation power. Photovoltaic panels are commonly used for 120W below 18V and above 36V. Voltage should be noted. The average daily sunshine time is generally 3 to 5 hours (the sun at noon is the total value, and the morning, as well as the afternoon, are under-weak values). This can all be done by google to find the local average sunshine time.
22A lithium battery / 5H (sunshine time) * 18V (solar voltage) = 80W (solar panel)
Lamp power 30W, need to configure 22Ah, 11.1V lithium battery, need to match 80W solar panel.
Three, the budget plan
1, solar panels are divided into polycrystalline and monocrystalline two materials. Polycrystalline selling price is cheaper than monocrystalline 1 ~ 20 cents.
2, the light source according to the style to go
3, lithium battery 11V price equals about six times the 3V.
This is the price used to build on the 30W power. As a reference, the price is not the same for each factory. Do not know, directly contact me on it.
This simply gives you the formula to plan your budget and use of power. The business person to your products and offers can meet your needs for service through the power that can be simply derived. The card formula will be able to screen out 80% of the water.
V. Frequently Asked Questions
1, the battery is more significant. Will the lighting time be longer?
The actual power generation can not keep up. The battery is no longer large enough to play a role in the range of lithium batteries and solar panels to linkage adjustment parameters. Adjustment of 1 parameter alone is playing rubbish.
2, more light beads will not be brighter than the light beads less?
No, the brightness is related to the power and light efficiency.
3, lithium iron battery is not better than a ternary lithium battery?
Theoretically, the cycle life is yes, but the actual discovery used in the lighting industry lithium iron batteries are mostly old batteries.
4, people with high power, why is the configuration lower than you?
False label parameters, most of the online false label values. The formula can be derived from their own calculations. Thousands of changes do not deviate from the same thing, speaking of science.
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