We donate hot water for SV Sierning

Hot water for soccer club

We have sponsored our hot water solution by photovoltaic power to the local soccer club – with great success!

Datos sobre el proyecto

Type of building:
Photovoltaic power, orientation:
Heat storage size:
my-PV product in use:
System control by/with:
210921_Referenz_my-PV_ AC•THOR 9s M7 SV-Sierning

Customer statement

A soccer club naturally has a high hot water consumption. Even tough kickers look forward to a hot shower after a match or training session. The soccer field of SV Sierning is located in the immediate vicinity of my-PV's new company location. However, because the field is usually only in use in the evenings or on weekends, it quickly became clear after the installation of a 15 kWp photovoltaic system that the degree of self-consumption in the club building would be very low. So how could the large amounts of PV excess not be fed unprofitably into the power grid, but be put to good use on site? The solution was obvious: Adapt the 1,000 liter buffer storage tank for charging with photovoltaic heat, thereby directly relieving the existing gas boiler. This helps the environment and saves the association money. Thus, not only the hot water is produced photovoltaically for the most part of the year, but also the water-controlled building heating is supported.

However, in order to be able to immediately provide the desired comfort temperature at the fresh water module even with the smallest surplus quantities, it was decided - instead of normal heating rods - to introduce heat via an external heat exchanger. This was built in-house and the 9 kW screw-in heating element from my-PV was installed in it. The stepless power control of the radiator is done as usual by the AC•THOR 9s. In the M7 operating mode, however, it is also able to precisely control the speed of a Wilo heating pump. As a result, the amount of hot water conveyed from the heat exchanger into the buffer is always precisely metered and a thermally ideal charging of the storage tank is ensured.

Immediately after the implementation of the measure at the end of September 2021, noteworthy PV heat yields were already achieved. Thus, SV Sierning is well prepared for 2022 - with clean and renewable energy from its own roof, which can be used immediately in the shower after successful games.

Opinión personal del cliente y resumen

Warm water demand mainly in summer or in the months with good photovoltaic yields, a high warm water demand in quite fixed intervals and little own use of the photovoltaic system during the week: these are the perfect conditions for a solar-electric implementation of the hot water supply. Thanks to the AC•THOR 9s, it was possible to save over 6300 kWh of natural gas from January to mid-November 2022!

210921_Referenz_my-PV_ AC•THOR 9s M7 SV-Sierning
210921_Referenz_my-PV_ AC•THOR 9s M7 SV-Sierning
210921_Referenz_my-PV_ AC•THOR 9s M7 SV-Sierning

Weitere Referenzprojekte

Masonry stove and photovoltaic heat instead of a heat pump

The newly built single-family home impresses with environmentally friendly construction and innovative heating technology.

Leer más...


my-PV device trio achieves 98% PV self-consumption

By incorporating one AC ELWA 2 and two AC ELWA-E, a homeowner in Estonia achieved an impressive 98% of PV self-consumption.

Leer más...

A Single-Family House with system openness

Maximizing photovoltaic power in combination: This renovated house exemplifies the effectiveness of my-PV's system openness.

Leer más...

3 photovoltaic modules for hot water

Even a small PV system with 1.4 kWp prepares hot water in the summer with ELWA and thus saves 1 cubic meter of gas every day.

Leer más...

Swiss family increases self-consumption

In single-family house in the canton of Aargau, the Swiss software manufacturer Solar Manager controls the AC•THOR 9s!

Leer más...
my-PV Referenzprojekt ELWA Harz PV-Module

Hot water with the sun in Germany

The sun sends no bill: Thanks to ELWA, the sun provides hot water at no cost, even in the German Harz region.

Leer más...