Ultimately Guide to Choose Solar Lights Manufacturer & Supplier in China

Ultimately Guide to Choose Solar Lights Manufacturer & Supplier in China

With many solar light manufacturers claiming to be solar lighting experts, how can you tell which one is reliable? Indeed, choosing an excellent solar light manufacturer is not an easy task to do. You have to consider several factors and check some parameters. 

Once you managed to get an excellent solar light manufacturer, your business is surely half done. You can get the lowest cost and best quality product in the market which makes you one step ahead of competitors. Aside from that, some manufacturers can cooperate with you to develop new products to suffice the increasing demand of consumers. They also have the latest production process and quality inspection process. With that said, you can assure that your solar light products possess the utmost performance and quality.

However, if you are unfortunate and find a junk solar factory, then you are likely to waste money and time. I bet you don’t want to get a poor response from the manufacturer after receiving your orders. Getting a product with bad quality material can also inflict great damage to your business. Sure thing, receiving a large proportion of customer complaints, and no after-sales service at all, are the worst things to happen. So, ADN decided to decipher this problem through this article to avoid these kinds of bad suppliers. Choosing the right and reliable solar lights manufacturer should never be like opening a blind box.

integrated-solar-street-light-production

Supply Chain Area

We all know that China is such a big country, with 34 provinces in total. But not all provinces produce solar lamps.

The production of solar lamps is mainly concentrated in Guangdong Province, Zhejiang Province, and Jiangsu Province. Where, solar lamp manufacturers in Guangdong Province are mainly concentrated in Guangdong, Shenzhen, Dongguan, and Zhongshan. The solar lamp manufacturers in Zhejiang Province are mainly concentrated in Ningbo, Jiaxing, and Yiwu. Lastly, Jiangsu Province’s solar light manufacturers are merely focused on Changzhou, Yangzhou, and Jiangsu City.

Chinese Map

On the other hand, suppliers of solar panels, batteries, aluminum shells, and other materials for solar lights are commonly found in several places. For this reason, the solar lamp factory can conveniently and quickly produce solar lamps at the lowest cost.

It is also necessary to note that many special styles and designs are concentrated in a certain supply chain region. In other words, there is a cost advantage in producing a certain type of solar street light in some production areas. For example, the following, the most advantageous production area for solar street lights is Zhongshan City, Guangdong Province. The main reason is the suppliers of accessories for these solar street lights are mainly established in and around Zhongshan City. ( Click here for All types of solar street lights 2022)

Online Method

With the use of modern technology, everything seems possible today. Even without directly visiting the factory, you can now order online through their solar company sites. One of the main sites to get the best solar LED light manufacturers are Alibaba, Madeinchia, DH, and Google. All you have to do is go straight to your computer desk and search for some manufacturers. But, just a friendly reminder, learn to inspect first the manufacturers you just found on the internet. We’re not saying that they are not reliable but we’re only reminding you to be extra careful.

Basic Information on Several Suppliers

When choosing a solar light supplier, be sure to understand the following information about the supplier.

You may look at the time when the supplier was established and its actual population size. To a certain extent, the length of the supplier’s establishment time can explain the market’s recognition of the company. Also, we can assume that the bigger the supplier is, the bigger the after-sale scale it can undertake. Not only the bigger the company, but also the better. However, larger solar companies usually offer higher prices because they have higher operating costs. But in terms of production time and customization, large companies are generally lower than small companies.

The supplier’s product range is also an important point. Usually, when the product range is too broad, it somehow indicates that the supplier is not competitive enough for a certain product. Of course, this conclusion is not absolute. All are subject to quotation and product quality.

Another thing is the service of the salesman, which can be seen directly. An excellent salesman can respond to your information in a timely and efficient manner. They will share with you a lot of useful market information and avoid many risks in the production and design process. For example, they can point out weaknesses in your solar light design, popular models in your market, etc.

Professional & Detailed Inquiry

Contact with suppliers usually starts with an inquiry and quotation. When confirming the details with the supplier, the more professional the requirements listed, the more serious the supplier will take your inquiry. You can also do a more comprehensive comparison and evaluation after gathering information from different suppliers.

Below, we introduce the details of solar light inquiry in detail. Some are summed up by our 10 years of solar lamp production. Especially the details of the main materials of solar lamps, many suppliers will not list so detailed in the quotation. 

LED

  • Led Chip Series: 2835, 3030, 5050 for example
  • Lumens efficacy: lumens per watt
  • Led Quantity
  • CCT: Range from 3000k to 6500k. Higher CCT, higher luminous efficacy
  • CIR: Special for projects using solar street lights

For more serious solar lighting projects, also requests LM-80 certification for the led chip.

Battery

square-lithium-battery

( Click for More details about solar lights battery)

Battery types: LiFePO4 / LiMn2O4, Square / Cylinder

Battery voltage: 3V / 12V

Battery cell Certification: UN38.3 MSDS is needed

Battery cell brand

Battery capacity

Solar panel

480W 520W mono solar panel

( Click for More details about solar panels guide)

Solar panel size

Solar panel power

Solar cell type: Mono / Poly

Solar cell series: 183*183mm 163*163mm for example

Controllers:

MPPT CONTROLLER

Types: MPPT / PMT

Life Span: 2 years / 3 years / 5 years

Fixture

Fixture size

Fixture weight

Material: PCB / Aluminium apply

Function

Motion dim: Motion range and distance

Auto time-control dim

Remote controller

If you can ask for such details in the communication process with the supplier, you can also have enough confidence to confirm the most suitable supplier.

The Cooperation Process

The safest process for us to select a supplier is a gradual process of cooperation.

Weigh the supplier company’s situation, feedback, and quotation, and select several alternative suppliers. You can also take samples from these suppliers for testing. From the suppliers who have passed the samples, place small batch orders to test the quality, production time, after-sales, service, and so on. Finally, 1 or 2 suppliers are selected for long-term cooperation.

Quality Control of Solar Lights 

After selecting the supplier, just wait for the supplier’s shipment notification. Maybe we can do something more positive to make the production of orders more controllable.

Quality Inspection of Materials

You can confirm with the supplier the date each material is ready. You may also request from them a photo of the material when it is ready to inspect everything.

After the material arrives at the factory, the material is tested and the quantity is counted before production. Check whether the internal wire length is up to standard, there are serious defects in the casing or the LEDs are desoldered. Sometimes, the solar panels might get damaged also during transportation, so you should always check on that. Among them, the quality of batteries and controllers can be checked at the time of production.

Quality Inspection During Production

Finished solar street lights cleaning
Finished solar street lights cleaning

The quality inspection in the production process includes the proper connection of each wire, LED aging, and the waterproof glue at the LED wire connection. You should check if the screw is not loose, the solar panel is fixed firmly or the sensor head is fixed firmly, etc.

Warm reminder, don’t forget to ask the supplier for pictures of the production process.

Finished Products Inspection

All in one solar street lights production line

Finally, these are the things you should do in a finished product quality inspection: 

(1) whether the solar light can be lit (also tested the discharge function of the controller and battery)

(2) whether the solar light can be charged (also tested the charging function of the solar light system)

(3) wiping the casing

If the design, material selection, quality inspection, and quality inspection in production are all done in place, this inspection will not consume a lot of time.

Package

pallet package for solar streetlights
pallet package for solar streetlights

The inspection of the packaging includes: 

(1) checking whether the internal foam and the carton size match

(2) whether there is a gap between the product and carton box

(3) and whether the carton hardness is sufficient.

Shipping

The solar light contains lithium batteries, which are dangerous goods so they should be handled and shipped properly. Particularly, for high-power solar lights, international express delivery such as DHL, FEDEX, etc. will limit the lithium battery’s energy to no more than 120WH. Usually, due to its shipping complexity, the shipping cost of dangerous goods is much higher than that of ordinary items.

So, if the solar light is shipped by air or express, tell the freight forwarder if it contains a battery and its size. Also, suppliers usually have long-term cooperative freight forwarders for transporting dangerous goods and they provide freight quotations with competitive prices.

Aftersales

If there are no problems in the order from materials, production, quality inspection, etc., the defective rate of solar lamps can be less than 1%.

Usually, LEDs are the least prone to damage, and the damage rate of LEDs can almost be ignored. Also, normal circumstances cannot easily damage the solar panel. You only need to pack them firmly enough, and their damage rate can also be at one thousandth. So we suggest attaching 1/1000th solar panel and LED in mass production order.

The battery and controller have a failure rate of 2/1000 to 3/1000 during use. So we suggest attaching 2/1000th battery and controller in mass production order.

Choose the Matching Supplier & Grow with the Supplier

Here, ADN is trying to say that A-level suppliers like the ones we said earlier are not too hard to find. But choosing a supplier that matches your current business scale is our goal.

There is a sizable factory A that makes orders for big buyers like Walmart. They can produce what you need for a year in a few days. You will surely get happy to work with them and share with them your business plan and current product orders. Also, they easily gave their MOQ so you will know if it suits your material needs to customize your product. For a large company, they can usually produce goods for 3-4 weeks, then your order is completed after one month.

On the other side, let’s assume that the B factory has only been established for 2 to 3 years, and its production scale is not large. However, the salesperson you connect with is very professional, and all your questions can always be answered promptly. Also, your order is always fulfilled as fast as possible. There may be a small defective rate. However, they can do after-sales in time, and the defective rate of each order is constantly decreasing.

Yes, finding a supplier that matches your business scale and is willing to cooperate with you is your best supplier. If the supplier can grow with your company, so much the better.

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