Global Standard for Plug-In Solar Systems Takes Effect

A new global standard for plug-in solar systems is now in force, helping clarify installation rules for balcony solar panels and supporting the broader shift toward household renewable energy. The framework aims to enhance safety, simplify adoption, and reinforce the role of micro solar installations in the renewable energy transition.

A New Era for Plug-In Solar Systems

The world's first product standard specifically for plug-in solar systems became effective on 1 December 2025. A national standards body released the guideline to clarify how small-scale solar power systems—often installed on balconies—can be safely operated using household plugs. Under this new framework, balcony solar panels with peak outputs up to 960 watts may be connected through a standard domestic plug, while systems up to 2000 watts require a dedicated feed-in connector.

Enhancing Legal Certainty for Households

The standard provides households, tenants, and property owners with improved legal clarity regarding micro solar installations. While standards primarily serve manufacturers and retailers, this update is expected to benefit consumers significantly by simplifying access to household renewable energy and accelerating the broader transition toward decentralized solar power.

Clarifying Installation Requirements

The guideline highlights the use of certified mounting systems and creates a more reliable basis for installing balcony solar panels. This helps consumers challenge overly restrictive requirements often imposed by housing administrators. With updated recommendations on safety standards and installation practices, the framework aims to remove common barriers that impede the adoption of plug-in solar systems.

Next Steps in the Renewable Energy Transition

Stakeholders note that completing the ongoing standardization process for small-scale storage systems will be essential. Integrating compact storage with plug-in solar units will enhance system flexibility and help maximize the contribution of small-scale solar power to the renewable energy transition.