Inverter | VFD | Professional AC Drive Supplier

About Sanjing

First established in 2005, Guangzhou Sanjing Electric Co., Ltd. has become a global leader in motor drive and control systems. We specialize in variable frequency drives (VFD) for HVAC equipment, pumps, and other motor-driven applications.

Our mission is to provide innovative, energy-efficient solutions that integrate renewable energy transformation, transfer, and storage systems to meet unique customer needs — from household water supply to large-scale greenhouse irrigation.

Certified to multiple national and international standards, our products are trusted across industries including fans and water pumps, plastic and rubber processing, metal processing, and textiles.

Our Products

With the usage of variable frequency drive (VFD) greatly increased in HVAC equipment, Sanjing is committed to assist customers to choose the right VFD as the motor controller in every motor-driven equipment, fulfilling output requirements by adjusting motor speed.

VM600 Series Micro VFD

Newly launched simple AC drives with smaller size, easier adjustment, and better flexibility. Ideal for variable-speed control in compact applications.

• Compact design
• Easy setup
• High flexibility
• HVAC & small motor compatible

PDG10 Series Smart Effi Pump Drive

Multi-purpose smart pump drive independently developed by SAJ. Designed for efficient water pump speed control in diverse environments.

• Energy-efficient control
• Multi-pump compatibility
• Intelligent pressure management
• Built-in PID control

PDM20 Smart Mini Pump Drive

Outstanding compatibility with small three-phase horizontal booster pumps. Direct motor mounting eliminates need for control cabinet.

• Direct motor mount
• Compact footprint
• No external cabinet needed
• Ideal for bath water systems

PDS33 Series Solar Pump Controller

Leading solar pump technology with 10+ years of application experience. Ideal for farm irrigation, desertification control, and rural water supply.

• Solar PV compatible
• MPPT technology
• Off-grid operation
• Desert & agricultural use

PDS33 Solar PV Water Pump

Complete solar-powered water pumping system with integrated VFD. Designed for remote and sustainable water access.

• Full solar integration
• High-efficiency DC-AC conversion
• Automatic sun-tracking
• Sea water desalination ready

PD20 Series Smart Pro Pump Drive

IP65-rated enclosure for excellent dustproof and waterproof performance. Mountable on various pump motor junction boxes.

• IP65 protection
• Outdoor & industrial use
• Broad sensor compatibility
• Smart diagnostics

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VM1000B Series High-Performance VFD

After extensive technological upgrade, the VM1000B series offers better stability, reliability, and performance for demanding industrial applications.

• High torque control
• Advanced thermal protection
• Multi-motor support
• Industrial automation ready

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PD Series Pump Drive

Comprehensive line of variable frequency drives tailored for pump applications across residential, commercial, and industrial sectors.

• Full range of power ratings
• Pressure & flow optimization
• Energy-saving algorithms
• Remote monitoring support

Why Choose Sanjing VFDs?

Our variable frequency drives combine innovation, durability, and energy efficiency to deliver unmatched performance across industries.

Energy Efficiency

Reduce energy consumption by up to 60% with intelligent speed control and optimized motor performance.

Reliability & Safety

Certified to international standards with advanced protection features including overload, overvoltage, and short-circuit protection.

Global Support

Trusted by customers in over 100 countries with dedicated technical support and application engineering assistance.

Application Case Studies

Real-world implementations of Sanjing VFDs across diverse industries.

Bath Water Supply System

PDM20 Smart Pump Drive ensures stable pressure and quiet operation in residential bath systems.

Greenhouse Sprinkler Irrigation

Automated watering with precise flow control using PDM20 in agricultural greenhouses.

NingXia Agricultural Project

PDS33 Solar Pump Controller used in poverty alleviation irrigation systems powered by solar energy.

Multi-Pump Frequency System

PDG10 series enables efficient control of multiple pumps in large-scale water distribution.

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Professional AC Drive & VFD Supplier