I've heard that some platforms have ongoing connectivity issues with specific heat pump brands. How reliable is the Alva Link connection?

We designed Alva Link specifically to avoid the reliability problems that plague cloud-dependent integrations.

The core difference: Alva Link connects to your heat pump locally — over a physical cable or relay, directly from the device on your wall. There's no cloud server sitting between Alva and your heat pump, no manufacturer API that can go down, and no third-party app that can break after a firmware update.

This matters because cloud-based heat pump integrations are notoriously fragile. Manufacturer APIs change without notice, cloud services go offline, and a firmware update to your heat pump or its companion app can break the connection entirely — sometimes for weeks or months. If you've experienced these issues with other platforms, you're not alone.

Alva's local protocols (Modbus, OpenTherm, SG-Ready, sensor spoofing) are industry-standard interfaces that don't depend on any manufacturer's cloud infrastructure. Your heat pump doesn't need an internet connection. Alva Link doesn't need the manufacturer's permission. The connection is direct, fast, and resilient — it keeps working even if your internet goes down.