1. Open Platform Integrations.
  2. Pick the vendor. Inverters, batteries, chargers, switches, and air conditioning are separate connections.
  3. Follow that vendor’s connect flow. Some send you to their cloud to approve access. Some ask for an ID, a serial number, or an API key.
  4. Sync, then add the hardware from Discovered Devices.

Guides for the connections people use most are in this section: Sungrow, Deye, FoxESS, Sigenergy, Smappee, Tuya, Sensibo, and OCPP chargers.