MNRE's latest rooftop solar requirements go beyond inverter performance. M2M communication, Indian data residency and standardized generation-data integration are bringing cybersecurity and data sovereignty to the centre of India's rooftop solar ecosystem.
India’s rooftop solar ecosystem is expanding rapidly under the PM Surya Ghar: Muft Bijli Yojana, which targets rooftop solar installations across one crore households. At this scale, solar inverters are no longer simply devices converting DC power into AC power. Modern inverters are connected assets that generate and transmit operational data through data loggers, monitoring platforms and cloud infrastructure. Recognising the cybersecurity and grid-security implications of having millions of connected systems, MNRE has introduced requirements covering how inverter data is communicated, where it is stored and how generation data is shared with the National Portal. MNRE has specifically highlighted that communication modules transmitting data to servers outside India can create risks related to sensitive generation and consumption data, unauthorized control and, at sufficient scale, coordinated disruption of generation.
The requirements establish a more structured communication and data architecture for inverters installed under PM Surya Ghar. Key provisions include:
M2M SIM-based communication: Inverter communication devices, dongles and data loggers deployed under the scheme are required to have Machine-to-Machine (M2M) SIM communication protocol for secure and reliable data transmission.
Data residency within India: OEMs must ensure that inverter-related applications, monitoring and control servers, real-time data and information hosted on cloud platforms are stored in an encrypted, secure and protected environment and reside exclusively within India.
National Portal integration: OEMs are required to provide daily generation data, mapped against the inverter serial number or another identifier specified by MNRE, to the National Portal through a uniform API.
Data logger warranty: The data logger warranty should be included as part of the inverter warranty, recognising the communication device as an integral part of the overall system.
OEM accountability: MNRE's prescribed undertaking requires manufacturers to declare compliance and provide details of the server/cloud location, including the data centre name and city within India.
A large part of today's inverter ecosystem uses Wi-Fi dongles for remote monitoring. The inverter connects to the customer's Wi-Fi network, and operating data can then be transmitted to an OEM's monitoring or cloud platform. This approach is convenient, but it also makes connectivity dependent on the customer's local internet network. M2M-enabled data loggers introduce dedicated cellular connectivity for machine-to-machine communication, reducing dependence on customer Wi-Fi and creating a communication architecture better suited to large-scale connected infrastructure.
It is important to distinguish connectivity from cybersecurity. An M2M SIM alone does not make an inverter secure. Security depends on the complete architecture, including encryption, authentication, communication protocols, access controls, APIs, firmware and cloud infrastructure. MNRE's direction therefore needs to be understood together with its data-residency requirements and its stated objective of developing a vendor-neutral, secure and interoperable communication framework.
This becomes particularly relevant in a market that includes global inverter platforms. An inverter may be physically installed in India while its monitoring application or cloud infrastructure is hosted outside the country. MNRE's notifications specifically address this risk rather than treating the physical inverter and its digital infrastructure separately. Under the new framework, inverter-level data and the associated monitoring infrastructure for systems covered by the scheme must reside within India. This is significant because millions of individually small rooftop systems can collectively represent gigawatts of connected generation. At that scale, where the data resides, who can access the infrastructure and how devices communicate with remote systems become questions of grid security and data sovereignty, rather than merely product features.
For inverter manufacturers, compliance increasingly extends beyond electrical efficiency, safety certification and hardware reliability. OEMs also need to consider communication devices, M2M readiness, cloud architecture, cybersecurity, data residency and integration with government systems. For EPCs and installers, this adds another dimension to inverter selection. Alongside efficiency, warranty, serviceability and price, they will increasingly need to evaluate whether the inverter ecosystem supports the required communication and data architecture. For consumers, the change may largely happen behind the scenes, but it provides a clearer framework for how generation data is communicated, protected and handled.
The requirement to share daily generation data with the National Portal is equally significant. MNRE requires this data to be mapped against the inverter serial number and shared through a uniform API across inverter manufacturers, with the API limited to the minimum required parameters, including daily generation. This can create a more consistent framework for monitoring rooftop solar generation rather than leaving information fragmented across individual OEM platforms.
The larger message from these notifications is clear: India's solar infrastructure is increasingly also digital infrastructure. As rooftop solar scales towards millions of connected installations, inverter communication, cybersecurity and domestic control of energy data become increasingly important. MNRE's move towards M2M communication, Indian data residency and standardized National Portal integration is therefore more than a change in inverter specifications. It is a step towards creating a rooftop solar ecosystem that is secure, interoperable, accountable and designed around India's long-term grid requirements.
Written by
Armaan Garg
View LinkedIn