Faq - Junlin Electric Technology

If you have questions on NVVV’s products, please read the FAQ first. If the listed answers still cannot solve your problems, ease contact us or mail us , We would reply to you as soon as received your request.

As a dedicated manufacturer of standard power supplies, NVVV provides a wide variety of power supplies to meet different demands from the markets. However, selecting the right products relies heavily on the correct electrical characteristics and specification, we listed the frequently asked questions for your reference.

Is NVVV a manufacturer or a trader?

NVVV is a sub-brand of Zhejiang Junlin Electric Technology Co., Ltd. Junlin has been dedicated to producing switching power supplies for over 20 years and is a professional power supply manufacturer.

Do you accept ODM and OEM?

We have a complete design and technical team that can customize products, labels, and boxes. We welcome ODM and OEM customization.

What are the delivery time requirements?

For regular products, we have a large inventory and generally ship within three days after payment. If the quantity is large or customized boxes are required, the time is usually around 10-20 days, mainly depending on the quantity ordered.

What are the payment terms?

We accept multiple payment methods, including T/T, L/C, PAYPAL, D/A, D/P, O/A, Western Union, and Money Gram.

What are the shipping methods?

For samples or small orders, we deliver by international express, such as DHL, FEDEX, TNT, UPS, EMS, etc. For large orders, we deliver by sea or air according to the buyer's shipping instructions.

Can we become your supplier?

If your sales reach the corresponding amount, you are welcome to become our distributor or agent.

How can we contact you?

This is our independent website: www.cnnvvv.com
This is our YouTube channel: @NVVV-ry5js
This is our Facebook account: Cici Xu
WhatsApp: +8613362729272 +8618968803336
Alibaba International Station: https://junlinsmps.en.alibaba.com/

What is the product quality like?

Our products undergo strict quality control inspection procedures, including raw material inspection, process inspection, aging testing, and reliability testing, to ensure that the products leaving Junlin have no quality problems, with a return and repair rate controlled at less than 0.3%.

What is the application range of switching power supplies?

Our products are widely used in industrial automation control, indoor and outdoor LED lighting, industrial equipment, communication equipment, power equipment, instruments and meters, medical equipment, semiconductor refrigeration and heating, communication equipment, audiovisual products, security monitoring, and instrument fields.

What output voltage do we provide?

3V, 5V, 9V, 12V, 13.8V, 15V, 18V, 24V, 27V, 36V, 48V, etc. We accept customization of different output voltage requirements.

What is the output power range we supply?

We have a complete range of output power from small to large: 10W to 3000W.

What are the installation hole positions and terminal screw specifications for switching power supplies?

There are two types of terminal screws: φ3 and φ4. (15-800W) MS-15/25/35/50/60 is φ3 and all others are φ4. The installation hole screws also have two types: φ3 and φ4, depending on the specific model.