What is S2?
S2 is an open standard for smart energy device communication.
Learn more Open global smart energy standard
The global home for S2-compatible smart energy devices
S2 enables secure, reliable and vendor-independent communication for smarter, more sustainable energy systems.
Why does compatibility matter?
It enables devices to work together securely across brands, systems and services.
Learn moreWho is this for?
Consumers, installers, manufacturers and energy service providers.
Learn moreWhy S2?
Built for reliable energy interoperability.
Interoperability
Devices can work together across brands and systems.
Vendor independence
Freedom of choice for installers, consumers and service providers.
Smart energy management
Coordinate and optimize flexible energy devices.
Future-proof installations
Keep energy systems ready for tomorrow.
Compatible brands
Approved manufacturers only.
Brands appear here only when they have at least one manually approved S2-compatible device.
Recently added compatible devices
Published devices from the approved database.
Pending submissions are never shown on the public website.
Is your device S2-compatible?
Help the world connect smarter. Submit your device for manual review and publication in the S2Compatible directory.
Open and global directory
Secure and reliable
Independent and transparent
Built for sustainable energy