Which devices is the Theben HEMS compatible with?
The Theben HEMS is compatible with a wide range of devices e.g. Photovoltaic systems, heat pumps, charging facilities for electric vehicles, heating controls and other devices that are used in a home energy management system can be integrated. It is important that the devices have a communication interface that can communicate with the HEMS.
Which interfaces are available?
2x LAN (local network, Modbus TCP, EEBus)
2x RS485 (Modbus RTU)
4 relays (NO contact)
5 digital inputs
Can I use variable electricity tariffs?
Yes, you can use variable electricity tariffs with the Theben HEMS. The system is capable of electricity consumption to the more favorable periods of the electricity tariff and, for example, to operateappliances when the electricity price is at its lowest.
Integrated are tariffs from Tibber, aWATTar and the EPEX electricity exchange data (DE, LU)
Who installs a HEMS?
The installation of a HEMS should be carried out by a qualified electrical contractor who has experience with the integration of home energy management systems. The HEMS is usually connected to the connected to the power grid and other relevant devices.
Are there any monthly / hidden costs?
No – there are no monthly or hidden costs in the first 5 years after purchase.
Both the use of EPEX electricity exchange data and the forecast weather data are fully included during this period.
At the end of the 5 years, the use of these optional data sources can be extended if required. The EPEX electricity price data and the forecast weather data are then available as additional options and can be can be booked for a fee – but there is no obligation to do so. no obligation for an extension.
Is a smart meter gateway absolutely necessary for the HEMS to function?
A Smart Meter Gateway (SMGW) is not mandatory for all functions of the HEMS, but it is necessary if you want to implement the statutory requirements according to §14a EnWG.
Does the Theben HEMS work with every smart meter gateway?
The Theben HEMS works with all smart meter gateways that meet the requirements of the market. requirements of the market.
How or who sets up the connection between SMGW and HEMS?
The connection between the Smart Meter Gateway (SMGW) and the HEMS is usually established by the HEMS installer or a qualified electrician. The communication protocols and network settings to ensure smooth communication between the devices. between the devices.
Does the HEMS replace the FNN control box?
No, the HEMS does not replace the FNN control box.
The HEMS is used to manage and optimize the energy consumption and generation within your home, while the FNN control box is specifically responsible for the remote control and electricity consumption in accordance with legal regulations.
As a homeowner, do I have to prove that I have implemented §14a EnWG?
Yes, as a homeowner you must prove that you have implemented the requirements of §14a EnWG, if you install a smart meter gateway and use the HEMS. This applies in particular to Communication with the grid operator to control and monitor electricity consumption.
My network operator has installed an FNN control box with relays for me. Can I query the relays of the FNN control box with the HEMS?
Yes, the Theben HEMS can query the relay outputs of the FNN control box.
The system has 5 digital inputs with which the relays of the FNN control box are queried can. This allows you to monitor the status of the relays and integrate them into the energy management system. integrate.
Who installs the SMGW and FNN control box?
The Smart Meter Gateway (SMGW) and the FNN control box are usually supplied by the grid operator or installed by an authorized service provider. It is important to ensure that the installation meets the legal requirements and the specifications of the grid operator.
Can the grid operator cut off my electricity completely in accordance with §14a EnWG?
In accordance with §14a EnWG, the grid operator may not not simply switch off, but only in the form of regulate dimming. This means that the power consumption can be reduced if required, but the Electricity remains available, but in smaller quantities. This is done to ensure the grid stability and in accordance with legal requirements when the grid is overloaded or other bottlenecks exist. A complete shutdown of the electricity supply is not possible under normal circumstances. permissible.
How long can the electricity be dimmed/throttled by the grid supplier?
The maximum dimming time is 2 hours within 24 hours.
What does §14a EnWG mean?
The §14a EnWG (Energy Industry Act) regulates the controllable consumer equipment in the low-voltage grid.
In concrete terms, this means
- Grid operators are permitted to install consumer devices (e.g. heat pumps, wall boxes for electric cars or night storage heaters) to reduce the load on the electricity grids by temporarily reducing (dimming)their power consumption , but not switching them off completely.
- In return, consumers who install such controllable devices often receive a reduced grid fee tariff (so-called “controllable consumer tariff”).
- Technically, this control is implementedusing a smart meter gateway and an FNN control box.
The regulation according to §14a EnWG thus supports grid stability and serves to improve the integration of renewable energies into the electricity grid.
What does §9 EEG regulate?
The §9 EEG regulates the throttling of the feed-in of electricity from renewable energy sources. It lays stipulates that operators of renewable energy plants (e.g. solar plants) must reduce their electricity production if this is necessary due to grid overload or other reasons in order to ensure grid stability.
In such cases, the grid operator can throttle the feed-in and the operators do not receive any remuneration for the curtailed electricity. The purpose of this regulation is to ensure a stable power supply and the avoidance of grid bottlenecks.
The throttling can be receivedvia ripple control receiver or FNN control box.
Why do these legal regulations exist (§14a EnWG and §9 EEG)?
The statutory regulations such as Section 14a EnWG serve to ensure grid stability and to protect the energy consumption at times of high grid load. This ensures a reliable energy supply, while at the same time supporting the energy transition by allowing loads and generators to be producers can be flexibly adapted.
How long can ripple control receivers still be installed?
Ripple control receivers may still be used until December 31, 2032 be installed. From this point on all new installations that require remote control must be converted to modern smart meter gateways that meet the requirements of §14a EnWG correspond. This deadline is part of the statutory regulations for the digitalization of the energy transition and serves to improve the integration of renewable energies as well as the improved control and monitoring of electricity consumption.
Via the digital inputs of the Theben EnergyManager the ripple control receiver can also be integrated into the Home Energy Management System can be integrated. It is not absolutely necessary to have an SMGW or a FNN control box necessary to implement §14a EnWG. This solution is still permitted until the end of 2032.
