{"id":933,"date":"2025-09-02T06:07:51","date_gmt":"2025-09-02T06:07:51","guid":{"rendered":"https:\/\/hems.betacenter.net\/faq\/"},"modified":"2025-10-22T12:30:30","modified_gmt":"2025-10-22T12:30:30","slug":"faq","status":"publish","type":"page","link":"https:\/\/hems.betacenter.net\/en\/faq\/","title":{"rendered":"FAQ"},"content":{"rendered":"[vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none”][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n

FAQ section<\/h1>\n[\/vc_column_text][toggles style=”minimal” accordion=”true” accordion_starting_functionality=”default”][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Which devices is the Theben HEMS compatible with?”][vc_column_text css=”” text_direction=”default”]The Theben HEMS is compatible with a wide range of devices <\/span><\/span>e.g.<\/span><\/span> Photovoltaic systems, heat pumps, <\/span><\/span>charging facilities for electric vehicles, heating controls and other devices that are used in a <\/span><\/span> home energy management system can be integrated. It is important that the devices have a <\/span><\/span>communication interface that can communicate with the HEMS.<\/span><\/span>[\/vc_column_text][nectar_cta btn_style=”text-reveal-wave” heading_tag=”h6″ button_color=”default” button_border_thickness=”0px” link_type=”regular” alignment=”left” alignment_tablet=”default” alignment_phone=”default” display=”block” display_tablet=”inherit” display_phone=”inherit” icon_family=”none” link_text=”Compatibility list”][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Which interfaces are available?”][vc_column_text css=”” text_direction=”default”]\n

2x LAN (local network, Modbus TCP, <\/span>EEBus<\/span>)<\/span><\/p>\n

2x RS485 (Modbus RTU)<\/span><\/p>\n

4 relays (NO contact) <\/span><\/p>\n

5 digital inputs<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Can I use variable electricity tariffs?”][vc_column_text css=”” text_direction=”default”]\n

Yes, you can use variable electricity tariffs with the Theben HEMS. The system is capable of <\/span>electricity consumption to the more favorable periods of the electricity tariff and, for example, <\/span>to operate<\/span>appliances when <\/span>the electricity price is at its lowest.<\/span><\/p>\n

Integrated are tariffs from <\/span>Tibber<\/span>, <\/span>aWATTar<\/span> and the EPEX electricity exchange data (DE, LU)<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Who installs a HEMS?”][vc_column_text css=”” text_direction=”default”]The installation of a HEMS should be carried out by a qualified electrical contractor who has experience with <\/span><\/span>the integration of home energy management systems. The HEMS is usually connected to the <\/span><\/span>connected to the power grid and other relevant devices.<\/span><\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Are there any monthly \/ hidden costs?”][vc_column_text css=”” text_direction=”default”]\n

No – there are no monthly or hidden costs in the first 5 years after purchase.<\/span><\/b>
\nBoth the use of <\/span>EPEX electricity exchange data<\/span> and the forecast weather data are <\/span>fully included<\/span> during this period. <\/span><\/p>\n

At the end of the 5 years, the use of these optional data sources can be extended if required. The <\/span>EPEX electricity price data and the forecast weather data are then available as additional options and can be <\/span>can be booked for a fee – but there is no obligation to do so. <\/span>no obligation<\/span><\/b> for an extension.<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Recurring costs HEMS”][image_with_animation image_url=”705″ image_size=”full” max_width=”100%” max_width_mobile=”default” animation_type=”entrance” animation=”None” animation_movement_type=”transform_y” hover_animation=”none” alignment=”” border_radius=”none” box_shadow=”none” image_loading=”default”][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Is a smart meter gateway absolutely necessary for the HEMS to function?”][vc_column_text css=”” text_direction=”default”]A Smart Meter Gateway (SMGW) is not mandatory for all functions of the HEMS, but it is <\/span><\/span>necessary if you want to implement the statutory requirements according to \u00a714a EnWG. <\/span><\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Does the Theben HEMS work with every smart meter gateway?”][vc_column_text css=”” text_direction=”default”]The Theben HEMS works with all smart meter gateways that meet the requirements of the market. <\/span><\/span>requirements of the market. <\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”How or who sets up the connection between SMGW and HEMS?”][vc_column_text css=”” text_direction=”default”]The connection between the Smart Meter Gateway (SMGW) and the HEMS is usually established by the <\/span><\/span>HEMS installer or a qualified electrician. The <\/span><\/span>communication protocols and network settings to ensure smooth communication between the devices. <\/span><\/span>between the devices.<\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Does the HEMS replace the FNN control box?”][vc_column_text css=”” text_direction=”default”]\n

No, the HEMS does not replace the <\/span>FNN control box<\/span>. <\/span><\/p>\n

The HEMS is used to manage and optimize the energy consumption and generation within <\/span>your home, while the <\/span>FNN control box<\/span> is specifically responsible for the remote control and <\/span>electricity consumption in accordance with legal regulations.<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”As a homeowner, do I have to prove that I have implemented \u00a714a EnWG?”][vc_column_text css=”” text_direction=”default”]Yes, as a homeowner you must prove that you have implemented the requirements of \u00a714a EnWG, <\/span><\/span>if you install a smart meter gateway and use the HEMS. This applies in particular to <\/span><\/span>Communication with the grid operator to control and monitor electricity consumption.<\/span><\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”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?”][vc_column_text css=”” text_direction=”default”]\n

Yes, the Theben HEMS can <\/span> query <\/span>the relay outputs of the <\/span>FNN control box.<\/span><\/p>\n

The system has 5 digital inputs with which the relays of the <\/span>FNN control box<\/span> are queried <\/span> can. This allows you to monitor the status of the relays and integrate them into the energy management system. <\/span>integrate.<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Who installs the SMGW and FNN control box?”][vc_column_text css=”” text_direction=”default”]The Smart Meter Gateway (SMGW) and the <\/span><\/span>FNN control box<\/span><\/span> are usually supplied by the grid operator or <\/span><\/span> installed by an authorized service provider. It is important to ensure that the installation meets the <\/span><\/span>legal requirements and the specifications of the grid operator.<\/span><\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Can the grid operator cut off my electricity completely in accordance with \u00a714a EnWG?”][vc_column_text css=”” text_direction=”default”]In accordance with \u00a714a EnWG, the grid operator may not <\/span><\/span>not<\/span><\/span> simply switch off, but only in the form of <\/span><\/span> regulate dimming. This means that the power consumption can be reduced if required, but the <\/span><\/span>Electricity remains available, but in smaller quantities. This is done to ensure the <\/span><\/span>grid stability and in accordance with legal requirements when the grid is overloaded or <\/span><\/span>other bottlenecks exist. A complete shutdown of the electricity supply is not possible under normal circumstances. <\/span><\/span>permissible.<\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”How long can the electricity be dimmed\/throttled by the grid supplier?”][vc_column_text css=”” text_direction=”default”]The maximum dimming time is 2 hours within 24 hours. <\/span><\/span>\u200b<\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”What does \u00a714a EnWG mean?”][vc_column_text css=”” text_direction=”default”]\n

The <\/span>\u00a714a EnWG (Energy Industry Act)<\/span><\/b> regulates the <\/span>controllable consumer equipment in the <\/span><\/b>low-voltage grid<\/span><\/b>.<\/span><\/p>\n

In concrete terms, this means<\/span><\/p>\n

    \n
  • Grid operators are permitted to install consumer devices (e.g. heat pumps, wall boxes for electric cars or <\/span>night storage heaters) to reduce the load on the electricity grids by temporarily reducing <\/span>(dimming)<\/span>their power consumption <\/span>, but not switching them off completely.<\/span><\/li>\n
  • In return, consumers who install such controllable devices often receive a reduced <\/span>grid fee tariff (so-called “controllable consumer tariff”).<\/span><\/li>\n
  • Technically, this control is <\/span> implemented<\/span>using a smart meter gateway and an <\/span>FNN control box<\/span>. <\/span><\/li>\n<\/ul>\n

    The regulation according to <\/span>\u00a714a EnWG<\/span><\/b> thus supports grid stability and serves to improve the integration <\/span>of renewable energies into the electricity grid.<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”What does \u00a79 EEG regulate?”][vc_column_text css=”” text_direction=”default”]\n

    The <\/span>\u00a79 EEG<\/span><\/b> regulates the <\/span>throttling of the feed-in <\/span><\/b> of electricity from renewable energy sources. It lays <\/span>stipulates that operators of renewable energy plants (e.g. solar plants) <\/span>must reduce <\/span>their <\/span>electricity production if this is necessary due to grid overload or other reasons <\/span>in order to ensure grid stability. <\/span><\/p>\n

    In such cases, the grid operator can throttle the feed-in and the operators do not receive any <\/span>remuneration for the curtailed electricity. The purpose of this regulation is to ensure a stable <\/span>power supply and the avoidance of grid bottlenecks.<\/span><\/p>\n

    The throttling can <\/span> be received<\/span>via ripple control receiver or <\/span>FNN control box.<\/span><\/p>\n[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”Why do these legal regulations exist (\u00a714a EnWG and \u00a79 EEG)?”][vc_column_text css=”” text_direction=”default”]The statutory regulations such as Section 14a EnWG serve to ensure grid stability and to protect the <\/span><\/span>energy consumption at times of high grid load. This ensures a reliable <\/span><\/span>energy supply, while at the same time supporting the energy transition by allowing loads and generators to be <\/span><\/span>producers can be flexibly adapted.<\/span><\/span><\/span>[\/vc_column_text][\/toggle][toggle color=”Default” heading_tag=”default” heading_tag_functionality=”default” title=”How long can ripple control receivers still be installed?”][vc_column_text css=”” text_direction=”default”]\n

    Ripple control receivers may still be used until <\/span>December 31, 2032<\/span><\/b> be installed. From this point on <\/span>all new installations that require remote control must be converted to modern smart meter gateways <\/span>that meet the requirements of <\/span>\u00a714a EnWG<\/span><\/b> correspond. This deadline is part of the statutory <\/span>regulations for the digitalization of the energy transition and serves to improve the integration of renewable <\/span>energies as well as the improved control and monitoring of electricity consumption.<\/span><\/p>\n

    Via the digital inputs of the Theben <\/span>EnergyManager<\/span> the ripple control receiver can also be integrated into the Home <\/span> Energy Management System can be integrated. It is not absolutely necessary to have an SMGW or a <\/span>FNN <\/span>control box necessary to implement \u00a714a EnWG. This solution is still permitted until the end of 2032. <\/span>\u200b<\/p>\n[\/vc_column_text][\/toggle][\/toggles][\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"

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