A battery energy storage system (BESS, e.g. Tesla Powerwall, Sonnen, BYD) integrated into KNX typically exposes its state of charge (SoC) through DPT 5.001 (0-100 %) and its instantaneous power (charge or discharge) through DPT 14.056 (signed W).
True
The standard mapping pattern for a battery on KNX is to expose the SoC as DPT 5.001 (a percentage from 0 to 100 %), the instantaneous power as DPT 14.056 (signed watts, positive when charging and negative when discharging), and the operating mode as DPT 5.010 or a DPT 20.x enumeration covering automatic, force charge, force discharge and backup-only states. This typed exposure allows the visualisation and the logic to implement true multi-source priority: PV self-consumption first, then battery, then grid during the day, and battery discharge into the load during the night or peak tariff hours.
Confirm the sign convention of the power Group Object with the gateway manufacturer — some vendors invert it (positive = discharge), and a wrong sign silently breaks self-consumption logic without any error in ETS.
Keep going with the full KNX Advanced bank
Keep going with the full KNX Advanced bank: unlimited timed mock exams, detailed answers, history. From €19 (one-time payment).
See pricing — from €19 →See the 9 other KNX Advanced practice questions
Related questions
- On highly sensitive KNX Secure installations (strategic sites, defence buildings), the keyring keys can be stored in a Hardware Security Module (HSM) attached to ETS, guaranteeing that the keys never leave the secure hardware even during download operations.X. KNX Secure · HSM (Hardware Security Module)
- What is the principle of Constant Light Control regulation in KNX?5. Lighting Control · Constant Light Control
- Tunable White control (variable colour temperature, e.g. 2700 K warm to 6500 K cool) over KNX typically uses two distinct DPTs: one for the overall intensity (DPT 5.001, %) and one for the colour temperature (DPT 7.600, K).5. Lighting Control · Tunable White
- A KNX presence detector configured with a 15-minute timeout keeps the lighting on for that duration after the last detection, then automatically switches it off.5. Lighting Control · Präsenzerkennung
- The emergency lighting of a building CANNOT be driven by KNX alone: it must comply with dedicated standards (NF EN 1838, EN 50172) that require a self-contained system with a backup battery.5. Lighting Control · Sicherheitsbeleuchtung