Solutions & Applications

Compliant & Connected: Bridging Rooftop Solar with EVN’s Grid Using MAXiCom

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Navigating the New Solar Regulations

The landscape of renewable energy in Vietnam is evolving. With the introduction of Decree 58/NĐ-CP and Decision 429/QĐ-EVN, the government and EVN have established a strict legal framework for developing, connecting, and monitoring rooftop solar power systems.

For investors and operators, compliance is no longer optional. Specifically, Decision 378/QĐ-EVN outlines the technical requirements for connecting self-consumption rooftop solar sources to EVN’s monitoring and control systems .

The Technical Challenge: What EVN Requires

Connecting a rooftop solar system to the national grid involves more than just plugging in cables. For systems with a capacity of 100kW or greater, strict technical criteria must be met:

  • Monitoring & Control: Systems must be capable of exchanging data with the grid operator and receiving control commands .
  • Protocols: Communication must utilize standard protocols like Modbus TCP or IEC 60870-5-104 .
  • Security: Data channels between the solar source and the monitoring system must be encrypted .
  • Connectivity: The connection utilizes 3G/4G/5G or the Internet to link the investor’s system with the Power Company’s SCADA/monitoring center .

Meeting these requirements requires a robust gateway solution. Enter MAXiCom.

The Hardware Solution: MAXiCom Gateway

MAXiCom is a specialized hardware solution designed to bridge the gap between your rooftop solar system and EVN’s management systems.

Key Features

  • Universal Compatibility: It is compatible with the majority of inverters currently on the market.
  • Resilient Operation: MAXiCom operates independently and stores operational data locally, ensuring no data is lost even if the connection to the center is interrupted.
  • Secure Connection: It creates a secure VPN tunnel directly on the device to transmit metering data to the Power Company .

Powerful Specifications

Built for industrial environments, the MAXiCom device features a Quad-core Cortex-A55 processor and 4GB of RAM. It supports diverse communication ports including RS485, CAN, and Gigabit Ethernet, with optional 4G-LTE and Dual-band Wi-Fi. Security is paramount, with support for TLS and OpenVPN/IPSec.

Tailored Packages

MAXiCom offers flexible packages based on system size:

  • RT400: Supports up to 10 Inverters / 400kW .

  • RT700: Supports up to 15 Inverters / 700kW.

  • RT1000: Supports up to 20 Inverters / 1000kW.

All packages include 24/7 monitoring and 1 year of free Cloud service .

The Software Powerhouse: ATDigital IoT

 To visualize and manage the data collected by MAXiCom, AT Energy provides the ATDigital IoT cloud platform. This is a centralized command center for your solar assets.

Comprehensive Monitoring & Control

  • Real-time Tracking: Monitor continuous yield and update the operational status of panels, inverters, and storage systems .
  • Remote Control: The system allows for P (Active Power) and Q (Reactive Power) control settings sent to the MAXiCom device, including scheduling for Zero Export functionality .
  • Fault Management: Instant alerts are generated for abnormalities, supporting proactive maintenance planning.

Advanced Data Analytics

ATDigital IoT features a “Low-code” rule chain engine, allowing users to easily drag and drop logic to process data, create alarms, or forward data to other systems . The platform supports hybrid databases (SQL and NoSQL) to handle massive time-series data efficiently.

Multi-Platform Access

Whether you are in the office or on the go, ATDigital IoT is accessible via Web App, Android App, and iOS App.

Conclusion: Seamless Integration for a Greener Future

By combining the MAXiCom gateway with the ATDigital IoT platform, solar investors can ensure full compliance with Decree 58/NĐ-CP and Decision 378/QĐ-EVN. This integrated solution not only satisfies legal requirements but also optimizes operational efficiency through real-time data analysis and remote control capabilities.

Ready to connect your Rooftop Solar system? Contact AT Energy for a consultation on the MAXiCom solution today.