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MNRE Rolls Out Testing Framework for Inverter Monitoring Systems Under PM Surya Ghar

The Ministry of New and Renewable Energy (MNRE) has introduced detailed testing guidelines for inverter-based Remote Monitoring Systems (RMS) and dataloggers deployed under the PM Surya Ghar: Muft Bijli Yojana. The move aims to standardise system performance, strengthen cybersecurity, and ensure seamless integration with a centralised IoT-enabled SCADA platform.

The framework establishes a structured approach for validating communication systems used in rooftop solar installations. It builds on earlier compliance measures issued in 2025 and focuses on ensuring reliable data exchange, secure communication, and consistent operational performance across devices.

At the technical level, the guidelines define protocols for API-driven communication and MQTT messaging while mandating compliance with global standards such as IEC, TCP/IP, and TLS encryption. Security remains a key priority, with requirements including IMEI-based device identification, certificate-based authentication, and AES-256 encryption to safeguard data transmission.

The testing process covers multiple layers of system functionality, including device configuration, inverter communication, energy meter integration, and cloud connectivity. Manufacturers must demonstrate adherence to structured data formats, including JSON-based templates for reporting across different system components.

To enhance monitoring capabilities, the framework supports various communication modes such as periodic data transmission, event-triggered alerts, and on-demand data access. It also specifies connectivity standards like RS485 and MODBUS for inverter interfacing, along with LAN, Wi-Fi, and cellular networks (4G/5G) for remote access.

MNRE has also introduced an interim testing platform, allowing manufacturers and OEMs to validate their systems before full-scale deployment. Companies are required to submit detailed technical specifications and declarations as part of the certification process.

Additional requirements include local configuration interfaces, HTTP-based setup APIs, real-time clock integration for accurate timestamping, and defined storage capacities ranging from 16 MB to 256 MB for data retention.

Overall, the guidelines reflect a strong policy push toward digital standardisation and transparency in India’s rooftop solar sector. By enforcing uniform testing and communication protocols, MNRE aims to improve system reliability, enable better performance tracking, and support the large-scale integration of distributed renewable energy systems.