Single-family house Günther
Using photovoltaic power with the ELWA for water heating
Facts about the project
- Owner
- Photovoltaic system
- System
- Hot water supply
- Hot water demand
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Customer statement
"I am a farmer and use the ELWA for domestic hot water heating in the house. I installed the system in early 2019. The electricity is directly generated from solar panels. These panels are directly connected to the ELWA, so there is no detour through the public grid. I am very satisfied with the system and see several advantages:
No registration according to the EEG
Lower investment costs compared to thermal solar collectors
The heating of domestic water works even on cloudy days
Electricity is produced even with low brightness
The technology requires no maintenance
It is only important to note that the boiler needs a 1.5-inch connection for the ELWA at an appropriate location. In my case, this was at the bottom, as solar energy is supposed to be the primary energy source. Only what the sun cannot provide will be supplemented by my wood chip heating system. In some older boilers, the opening for the electric heater is located halfway up (see picture) because it was not originally intended to be the primary energy source," explains Christoph Günther from Osterhofen, sharing his experiences.
Product details ELWA
0 – 2,000 W stepless regulation
Target temperature adjustable with rotary knob
Works even during a power outage
For hot water storage tanks with 100 – 1,000 liters
Self-consumption 2 W
Efficiency >99% at rated power
Hot water supply 750 W optional
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