A smart control system: monitor, analyze, and manage intelligently!

Home energy management systems connect energy usage, generation and storage within a household.

The energy flows between the PV system, heat pump and charging station are recorded and the solar power is optimally distributed. The HEMS acts as a pacemaker for increasing self-consumption and reducing electricity costs for the end user; it is also essential for the future increased use of dynamic tariffs.

Use of EEBUS for a HEMS

To perform energy management, communication with devices and towards the SMGW is essential. EEBUS provides a common language for all domains from the grid connection point to e-mobility, HVAC, inverters, and white goods.

In cooperation with the BSI, EEBUS was defined by the VDE in 2025 as the minimum standard for communication within the home. Years of successful applications in various funding projects and real-world implementations demonstrate easy commissioning and secure communication.

Providers of all devices in the home use digital connections to optimize energy flows, which KEO – based on the EEBUS standard – provides individually for the respective devices.

Additional use cases that will soon enable the use of dynamic tariffs or self-consumption optimization are also available for the HEMS application field from KEO.

Implementation of use cases in EEBUS:

Grid compatibility (§14a EnWG / §9 EEG)

  • Limitation of Power Consumption (LPC). A short-term power limitation is received by the GCP and communicated to individual end devices. Part of the LPC also includes a failsafe functionality in case of a connection loss.
  • Limitation of Power Production (LPP). A short-term power limitation is received by the GCP and communicated to individual end devices. LPP is relevant for producing devices according to §9 EEG, such as PV systems, batteries or bidirectional wallboxes.
  • Monitoring of Power Consumption (MPC). End devices transmit consumption, from current power to phase-specific values.

Dynamic tariffs.

  • Time of Use Tariff (TOUT). The GCP transmits electricity prices over the course of several hours. The EMS can use this information to optimize consumption.
  • CEVC. The wallbox plans a charging curve. The EMS provides tariff information for this purpose.
  • ITPCM. The heat pump plans its future consumption. The EMS provides tariff information for this purpose.
  • FSWG. Washing machines, dishwashers, etc. can flexibly shift their programs. The EMS uses this flexibility for self-consumption optimization.

Flexibility Provision

A household can make the flexibility of its appliances available to grid operators. Suitable EEBUS use cases also exist for this purpose:

  • Power Demand Forecast (PODF). An EMS provides a consumption forecast, which is forwarded to the grid operator via the SMGW.
  • Power Envelope (POEN). Minimum and maximum consumption values are communicated to the EMS as guidelines.

Self-consumption optimization

  • Monitoring of Grid Connection Point (MGCP). In order for the EMS to perform self-consumption optimization, it needs current consumption values for the entire household. The measurement data is communicated via MGCP.

The technical product solution used here: the KEO UseCase API.