EV Charging Auxiliary Power
Supports dual-voltage 12V/24V output for different charging setups.
22 Years in Industrial Power · Shenzhen Factory Direct
OEM Switching Power Supplies
Industrial · Security · Battery Charging
From electrical specifications and enclosure size to certification and mass production, our power engineers support security, telecom, industrial and new-energy projects.
MOQ 100 pcs90+ Patents<0.3% Return Rate15–25 Day Lead Time
Featured Products
Reliable Industrial Power Solutions
Focused on slim switching power supplies, POE power supplies, access control power, and centralized power boxes with OEM customization.
Find EPS and access control power by application
Separate multi-circuit DC backup, lock control and cabinet requirements before checking voltage, battery and load.
Why Us
Why Choose Shenzhen San Yi Precision Technology Co., Ltd.
Direct Factory Supply
Own 2,000+ m² production base — no middlemen, competitive pricing.
7-Day Rapid Prototyping
OEM/ODM samples delivered in as fast as 7 business days.
MOQ from 100 Units
Factory pricing available even for small-batch orders.
1-on-1 Tech Support
Senior engineers guide you from product selection to after-sales.
Global Certifications
Products certified by 3C, CE, FCC, UL, PSE, CB and more.
22 Years of Quality
Established in 2004 with 90+ patents — quality proven by time.
Certifications
Globally Certified Products
Our products meet compliance requirements for all major global markets
Partners
Trusted Industry Partners
About Us
22 Years in Power Supply
Source Manufacturer
Shenzhen San Yi Precision Technology Co., Ltd. focuses on integrated power solution R&D, production, and sales. Products are certified by 3C, CE, FCC, UL, and PSE, and exported worldwide.
22
Years Experience
90+
Related Patents
2000+
m² Production Space
Manufacturing
Complete Testing System
Stable Quality Delivery
From R&D to mass production, we run conduction, surge, and temperature tests to ensure long-term reliability for smart city and industrial automation projects.
Send Message
Free Tools
Online Selection Tools
Professional tools to quickly find the right power solution
Power Calculator
Enter device info to calculate required power and get product recommendations.
Power Calculator →Voltage Drop Calculator
Calculate voltage loss based on cable parameters to optimize your design.
Voltage Drop Calculator →Battery Charger Selector
Match the right charger specs based on your battery parameters.
Battery Charger Selector →PoE Power Budget Calculator
Calculate total PoE power budget with cable loss and headroom, get PSU recommendations.
PoE Power Budget Calculator →Applications
Industry Use Cases
Industrial Switch Power
Stable operation for long-running industrial network devices.
Communication & Building Systems
Applicable to communication systems, building infrastructure, and PV industry scenarios.
Hotels & Commercial Buildings
Reliable power for access control, lighting, and security systems in commercial operations.
Medical Lighting Systems
Driving hospital LED panel lights and emergency lighting with medical-grade stability.
Smart Parking Facilities
Centralized power for license plate recognition, barrier gates, and LED lighting.
Frequently Asked Questions
What certifications do your switching power supplies have?
Our products are certified by 3C, CE, FCC, UL, and PSE, meeting compliance requirements for major global markets.
Do you support OEM/ODM customization?
Yes. With 22 years of power supply customization experience, Shenzhen San Yi Precision Technology Co., Ltd. can tailor output voltage, wattage, casing, and connectors to your specifications — from design to mass production.
What is the minimum order quantity (MOQ)?
The MOQ for standard products is 100 units. For custom products, the MOQ depends on the specific requirements. Contact our sales team for a detailed quote.
What is the typical lead time?
Standard products ship within 3–7 business days. OEM custom orders typically take 15–25 business days, depending on quantity and complexity.
What industries do your power supplies serve?
Our switching power supplies are widely used in security & surveillance, industrial automation, EV charging stations, telecom base stations, building electrical systems, and POE networks.