- Calibsun | Expertise
Data sovereignty
As solar energy assets scale globally, data sovereignty and data security has become a core operational requirement for IPPs, utilities, and grid operators. The concept defines where energy data is collected, who controls it, how long it is retained, and under which legal requirements it is processed.
We manage the sovereignty of your energy data
For solar forecasting technology providers operating across India, Europe, or China, meeting data residency requirements and local regulations is now a prerequisite. At CalibSun, data management is embedded at the architecture level from day one, ensuring that sensitive data stays where it legally must (processed in the country or region where it originates).
Key takeaways
- Data sovereignty means that energy data is subject to the regulations of the country where it is collected and stored (including where it is processed and transferred).
- On-site measurement data is operationally sensitive and requires stricter data protection controls than public satellite or NWP inputs.
- CalibSun's multi-region cloud architecture ensures full data residency compliance: data generated in a given country is ingested, processed, and stored within that country's data centers.
- Data sharing and transfers use token-authenticated encrypted APIs. SFTP and end-to-end encrypted payloads are also supported.
CalibSun’s data management is compliant with sovereignty requirements
What is data sovereignty and why it matters for energy data
Data sovereignty refers to the concept that personal data and operational data are subject to the laws and regulations of the jurisdiction where they originate. Countries have varying frameworks governing data localisation, retention periods, and cross-border transfers. Local laws may restrict transferring data outside national borders entirely.
For energy infrastructure, this has direct consequences. On-site production and measurement data reveals how a plant is piloted and managed. If exposed, it gives competitors strategic advantages. It may also represent a national security concern: energy network data can be used to map infrastructure vulnerabilities or manipulate markets in sectors with few active players.
The relationship between data sovereignty and operational security is therefore direct. Protecting local data is not a compliance formality. It is a condition for safe and competitive asset operation.
CalibSun uses three data input types for forecasting: public meteorological models, satellite imagery, and on-site measurements. The first two are widely accessible. But on-site data is proprietary, operationally sensitive, and subject to strict data handling practices. NDAs are systematically put in place during trial periods to protect this data from disclosure.
The concept that data generated by a solar plant must comply with data sovereignty requirements goes beyond storage. CalibSun’s solution: compute and display layers are deployed in the same region as the data. Nothing transits cross-border.
Legal compliance verification before deployment
Countries have varying regulatory frameworks. Before deploying in a new jurisdiction, CalibSun follows a structured verification process:
- Service availability check: confirm all required cloud services (database, compute, API) are available within the target region
- Regulatory review: research applicable data sovereignty laws, data protection laws, and local regulations governing energy infrastructure data
- Legal alignment with the client: most clients of significant scale have internal legal teams who validate data handling practices and ensure compliance with local requirements
- Specialist consultation: for complex jurisdictions, external specialists in data law can be engaged
CalibSun presents its multi-region architecture and secure transfer protocols as a standard part of the initial technical discussion.
- Data sovereignty
How CalibSun operates under strict data sovereignty rules
Running forecasting technology where the data is collected and stored
CalibSun’s cloud computing infrastructure was designed from the outset to be multi-region. When the first Indian client raised data sovereignty requirements, the team responded rapidly without restructuring the core platform.
The technical architecture is compliant with local requirements.
Exemple in India:
- Database: hosted on AWS Mumbai
- API: hosted on AWS Mumbai
- Forecasting compute: executed on a dedicated machine in India, triggered by a scheduling orchestrator based in Europe
- Data flow: client data enters via the API endpoint, is stored and processed in data centers locally , and the forecast is retrieved by the client.
- Cross-border signal: limited to a single trigger message (“launch forecast” / “forecast complete”) with zero data payload
This architecture also reduces latency. Data processed closer to its origin is accessed faster (a direct performance benefit for time-sensitive forecasting applications).
Once deployed for one client, this sovereign cloud infrastructure was progressively adopted by other clients in the same region. Data sovereignty compliance, when built into the platform, scales efficiently.
Adapting to on-premise when cloud services are unavailable
For clients requiring complete isolation from external cloud services, CalibSun offers NextEdge (an on-premise deployment that runs the full forecasting engine within the client’s own digital infrastructure).
In this configuration:
- No data transits to external cloud storage
- The client manages server availability and operational continuity
- CalibSun develops custom connectors and modules to integrate with the client’s existing databases, file formats, and local systems
- Forecast outputs are written directly into the client’s infrastructure in the required format
This solution is particularly relevant for organizations in high-sensitivity environments (including government-adjacent infrastructure, regulated public sector utilities, or clients whose internal privacy policy mandates zero external data exposure).
Security, control and operational sovereignty for energy companies
Operational sovereignty means knowing at every moment where data is, who can access it, and under what conditions. It requires embedding data governance principles into every development decision (not just into contract terms).
CalibSun’s approach to data security covers several layers:
- API authentication: token-based access control for all data exchanges
- SFTP: available for clients requiring legacy-compatible secure transfer protocols
- End-to-end encryption: data can be transmitted in encrypted form with client-held decryption keys. Even during transit, the payload remains unintelligible to any third party.
If a client wants a very high level of security, we can have them send data not only securely but also encrypted (with a personal decryption key they provide). The data remains encrypted throughout transit, like end-to-end encryption on a messaging application.
Beyond transfer security, CalibSun applies data quality control (QC) processing to ingested measurements. This cleaned and validated data can be returned to the client (giving them a higher-quality version of their own operational records). This reflects CalibSun’s expertise built over 15+ years in photovoltaics through its parent company Solaris.
- Questions
Data sovereignty : your questions answered
What is data sovereignty?
Data sovereignty is the concept that data is subject to the laws and regulations of the country or jurisdiction where it is collected or stored. It governs who can access data, where it can be processed, how long it can be retained, and whether it can be transferred across borders. This has direct implications for how organizations design their cloud architectures and ensure compliance with local laws. As data protection regulation frameworks such as the GDPR in the European Union have tightened — and as more countries have enacted their own privacy laws and data localization requirements — understanding data sovereignty has become a prerequisite for any organization operating internationally. It is closely related to, but distinct from, digital sovereignty, which extends to broader control over digital infrastructure and technology dependencies.
Why does data sovereignty matter for solar energy operators?
On-site production and measurement data is operationally sensitive and constitutes a form of intellectual property. It reveals plant management strategies and performance parameters that competitors could exploit if exposed to unauthorized access. Beyond competitive impact, insufficient control over data can create national security risks: energy network data can be used to map critical infrastructure vulnerabilities. For solar operators expanding into global markets, ensuring compliance with local data sovereignty frameworks is therefore not a formality — it directly protects customer trust, competitive positioning, and long-term operational continuity.
What are the main challenges of data sovereignty?
The main challenges include identifying where data is collected and processed across distributed cloud services, ensure compliance with local data sovereignty laws across multiple jurisdictions, managing data residency across cloud environments, and controlling transferring data between regions.
What is the relationship between data sovereignty and cloud?
Data sovereignty and cloud are deeply linked. Most cloud providers operate across multiple regions, but storing data in a given data center does not automatically ensure compliance with local regulations. Compute, API, and display layers must also remain within the same jurisdiction. Cloud storage location alone is insufficient.
How does CalibSun ensure data localisation for international clients?
CalibSun deploys its full stack (database, API, forecasting compute, and dashboards) within the data center region of the client’s country. For India, this means AWS Mumbai end-to-end. The only cross-border signal is a scheduling trigger (with no data payload).
