Viessmann and 50 Hertz integrate heat pumps to stabilize German grid – pv magazine International

According to the partner companies, smart heat pumps offer flexible capacities that network operators can use for safe operation, and households could also benefit from a reduction in electricity prices.

January 4, 2022

from pv magazine Germany

The German heating, industrial and refrigeration system manufacturer Viessmann is testing the network integration of heat pumps in the service area of ​​the electricity transmission network operator 50 Hertz.

Heat pumps generally make a contribution to the energy transition, as they generate CO2-free heat, but they could also offer network operators flexible capacities. Viessmann and the network operator Tennet have been testing this theory since 2020 and their efforts have now been extended to the 50 Hertz range.

Viessmann wants to identify flexible capacity options via interfaces on heat pumps and heat storage systems, bundle them via the “ViShare Energy Community” and offer them to the transmission system operators. The heat pump manufacturer promises anonymity and data protection-compliant transmission to the Equigy platform, which network operators can use to search for network capacities.

When determining possible capacities, care is taken to ensure that the temperatures in heat storage systems and in rooms do not drop too low and the participating households are rewarded for their flexible capacity. Viessmann charges a fee for the service offered and converts it into a heat electricity tariff that is several cents per kilowatt hour below the usual electricity price. The exact value depends on external factors such as the size and heating requirements of a household, which Viessmann asks when registering for the “Viflex” tariff.

Viessmann is looking for participating households in particular in federal states such as Schleswig-Holstein, Lower Saxony, Hesse, Bavaria, Berlin, Bremen and Hamburg. A Viessmann heat pump is not a prerequisite for participation. All that is required is a heating electricity tariff tailored to the heat pump, according to the manufacturer.

The company’s electricity prices recently made headlines thanks to proceedings before the Frankfurt am Main regional court. Consumer protection in North Rhine-Westphalia has sued Viessmann for “misleading advertising claims” behind its tariffs. According to a ruling by the regional court on December 21st, Viessmann is not allowed to show a “flat rate” electricity tariff because it is a volume tariff. However, the “Viflex” heat electricity tariff is not affected by this ruling.

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