Modern solar inverters and Battery Energy Storage Systems (BESS) are deeply integrated with cloud platforms, Energy Management Systems (EMS), and overarching SCADA networks.
While this extensive digital connectivity optimizes remote operations and grid responsiveness, it simultaneously exposes critical infrastructure to sophisticated malicious threats.
Consequently, establishing robust cybersecurity is no longer an optional upgrade; it is an absolute necessity to prevent unauthorized intrusions, safeguard highly sensitive operational data, and guarantee the uninterrupted stability of our modern power grids.
What is Solar Inverter Cybersecurity?
Solar inverter cybersecurity refers to the layered protection of connected PV and energy storage assets across hardware, firmware, communication networks, cloud platforms, applications, and operating procedures.
1. Device Security
At the equipment level, protection starts with the inverter, data logger, smart meter, battery interface, and control hardware. Good practice includes secure boot, strong access control, firmware integrity checks, patch management, vulnerability testing, and disabling unused interfaces.
2. Communication Security
As inverters exchange data with loggers, EMS, SCADA, cloud services, utility systems, and third-party platforms, secure transmission becomes essential. Encryption, mutual authentication, network segmentation, firewalls, and secure industrial protocols help prevent data tampering and unauthorized commands.
3. Cloud Platform and Application Security
For remote monitoring and O&M, security must extend to apps, web portals, APIs, and cloud-based services. Key measures include HTTPS, encrypted cloud transmission, MFA, role-based access control, tenant isolation, data retention rules, and audit logs.
4. Management System and Compliance Capability
Beyond technical controls, cybersecurity also depends on how the manufacturer manages risk across the product lifecycle. For buyers, this means checking whether the supplier has a secure development lifecycle, PSIRT process, incident response policy, third-party certifications, data protection framework, and a clear vulnerability disclosure channel.
Top Solar Inverter Manufacturers with Cybersecurity Capability
Sungrow
(1) Strategy and Governance
Sungrow has established a dedicated Cybersecurity and Data Protection Office under its Digital Transformation Management Committee. This organization coordinates information security management, privacy protection, data compliance, and product security incident response through its PSIRT process, integrating cybersecurity into the company’s long-term governance and operational system.
(2) Comprehensive Scenario Protection
- Sungrow’s Secure Development Lifecycle, or SDL, process has achieved CB certification to the IEC 62443-4-1 international security standard, issued by DEKRA. This reflects the company’s effort to embed cybersecurity requirements into product design, development, testing, release, and maintenance.
- Across connected PV and energy storage scenarios, Sungrow applies HTTPS encryption, device-cloud identity authentication, and secure cloud communication to protect data transmission and remote management channels. Multi-Factor Authentication, or MFA, is also used to strengthen account and access security.
- The Logger3000 data logger, a key communication component for PV system monitoring and remote O&M, has obtained ETSI EN 303 645 certification from DEKRA. This is particularly relevant because data loggers often serve as the bridge between field devices, monitoring platforms, and cloud services.
- In Wood Mackenzie’s 2026 global solar inverter manufacturer evaluation, Sungrow maintained a leading position. The ranking also reflects the growing importance of cybersecurity readiness, supply chain resilience, and long-term operational reliability in inverter procurement.
2. SMA
SMA places strong emphasis on secure communication, European data hosting, and certified cloud infrastructure.
Its cybersecurity approach includes Speedwire Encrypted Communication for secure data transmission, automatic firmware updates, mandatory strong passwords, minimized interfaces and ports, and EU-based data hosting designed to support GDPR and NIS2 requirements.
SMA also highlights ISO 27001-certified cloud infrastructure in Europe and ETSI EN 303 645 compliance for devices with wireless connectivity.
3. Fronius
Fronius focuses on data protection, secure access, and European data sovereignty.
For Fronius Solar.web, user data is stored on servers in Austria, while system data is stored on European servers.
The company also separates customer data and system data, helping limit the scope of exposure in the event of a security incident.
Its cybersecurity approach includes security by design, security by default, encryption, authentication, isolation of security-relevant areas, and level-based access methods.
4. Huawei
Huawei brings strong digital infrastructure experience to its FusionSolar ecosystem.
Its Smart PV cybersecurity materials state that Huawei commercial inverters have passed CC EAL3+ certification, while SmartLogger3000, LUNA2000B, and LUNA2000C have passed IEC 62443-4-2 SL2 certification.
Huawei also states that its product development process has passed IEC 62443-4-1 ML3 certification, and its information security management has passed ISO 27001 series certification.
Solar Inverter from Sungrow
1. Residential scenario: SH15/20/25T
The SH15/20/25T hybrid inverter supports solar-plus-storage applications with battery integration, backup power, and iSolarCloud-based energy monitoring.
- This hybrid inverter family offers 15–25 kW rated AC output, 1000 V maximum PV input voltage, and up to 98.2% maximum efficiency.
- With backup switching in as little as 10 ms, it helps maintain power continuity during outages, making it suitable for larger systems with higher daytime loads or stronger backup needs.
2. Commercial & Industrial Scenario: SG125CX-P3
For C&I rooftops, factories, and distributed commercial PV projects, the SG125CX-P3 is built to improve energy yield, strengthen active safety, and simplify O&M.
- This 125 kW string inverter delivers up to 98.5% conversion efficiency and supports system expansion up to 3 MW.
- Its AFCI 3.0+ technology can detect arc currents up to 40 A across distances up to 600 m, helping reduce fire risks in long-string commercial installations.
- It also provides PV-to-ground fault protection within 15 ms and intelligent two-in-one string-level disconnection within 20 ms, enabling faster fault isolation and safer system operation.
3. Utility-scale/grid scenario: SG465HX
For utility-scale PV plants, the SG465HX is optimized for high-capacity power conversion, grid adaptability, and lower system-level LCOE.
- This 465 kW utility string inverter is built around an AC 1000 V architecture and a 9.84 MW subarray configuration, supporting large-scale plant design with higher power density.
- It also features dual protection and PV-GFM grid-forming capability, making it suitable for solar projects facing stricter grid connection and stability requirements.
Conclusion
Today, solar inverter cybersecurity compliance is becoming a core requirement for modern PV and energy storage projects. For buyers, the right manufacturer should offer more than high conversion efficiency. It should also demonstrate secure product development, reliable communication protection, clear vulnerability response processes, and recognized compliance capabilities.
Sungrow combines cybersecurity governance, certified secure development practices, and scenario-based inverter solutions for residential, C&I, and utility-scale applications. Explore Sungrow’s inverter portfolio to find the right fit for your next energy storage project.
