Precision Power
Metering Solutions

Trusted by global partners for over 17 years — delivering high-accuracy AC/DC energy meters, IP PDU boards, and smart metering modules for EV charging, solar, and IoT applications.

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About JSY-MK

Shenzhen Jiansiyan Technologies Co., Ltd (Brand: JSY-MK) was founded in 2009, focusing on the research and development of electric energy metering technology. As a high-tech enterprise, we are committed to providing professional one-stop services from technical solutions to related hardware manufacturing.

Over the past 17+ years, JSY-MK has developed more than 300 kinds of products, including AC/DC energy metering modules, solar energy meters, IoT WiFi meters, smart PDU meters, gateways, and EV charging motherboards.

17+

Years Experience

300+

Products Developed

Global

Footprint

Our Featured Products

Engineered for precision, reliability, and scalability — our energy metering modules serve industries from EV charging to smart grids and renewable energy systems.

JSY-MK-138 100A RS485 12-Channel

100A Max Current
12-Channel Monitoring
RS485 Modbus-RTU
DIN Rail Mount

AC Energy Meter

JSY-MK-341 Three-Phase IP PDU

Three-Phase Intelligent Meter
IP65 Protection
Remote Monitoring
Smart PDU Integration

IP PDU Meter

JSY-MK-352 IP PDU Main Board

Intelligent Power Control
Modbus & TTL Support
High Integration Design
For Data Center & EV Charging

PDU Main Board

JSY-MK-141G 6-Channel 100A

6-Channel DIN Rail Meter
100A AC Input
Modbus-RTU Output
Compact Industrial Design

AC Energy Meter

JSY-MK-339 3P4W 150A

Three-Phase Four-Wire
50mA–150A Range
RS485 Communication
High Accuracy ±0.5%

Three-Phase Meter

JSY-MK-229 DC 800A EV Charger

DC 50A–800A Range
Single Phase EV Charging
RS-485 Interface
For Fast Charging Stations

DC Energy Meter

JSY-MK-231 DC Energy Module

Single Phase DC Metering
High Isolation Voltage
Compact TTL/RS485 Output
Suitable for Solar & EV

DC TTL Module

JSY-MK-354 AC Bi-Directional

Three-Phase Bi-Directional
Net Metering Support
80A Standard Rating
For Grid-Tied Solar Systems

Bi-Directional Meter

View All 300+ Products

Why Choose JSY-MK?

We combine innovation, precision engineering, and global support to deliver reliable energy metering solutions.

High Accuracy

±0.5% measurement precision across all models for reliable data collection.

17+ Years Expertise

Proven track record in energy metering with continuous R&D innovation.

Global Compliance

Products meet international standards for safety and performance.

Custom Solutions

Tailored designs for OEMs and industrial integration projects.

Frequently Asked Questions

Get answers to common inquiries about our products and services.

What communication protocols do your meters support?

Our meters support RS485 (Modbus-RTU), TTL, and IP-based communication. Many models offer dual interface options for flexible integration.

Can you customize the firmware or hardware?

Yes, we offer full customization services including firmware adaptation, hardware modifications, and private labeling for OEM partners.

Are your products suitable for EV charging stations?

Absolutely. Our DC energy meters like JSY-MK-229 and JSY-MK-231 are specifically designed for EV charging pile applications with high current support and isolation.

Do you provide technical support?

Yes, our engineering team provides comprehensive technical support for integration, troubleshooting, and application guidance.

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Precision Power Metering Solutions