Single-family house – Brandstötter
Pioneer for solar-electric hot water: ELWA in operation for hot water preparation since 2014.
Facts about the project
- Client/owner/planner
- PV system
- System
- Hot water backup
- Hot water demand
![Referenz_ELWA_Brandstoetter_433x260px my-PV](https://a.storyblok.com/f/225509/433x260/042f41e013/referenz_elwa_brandstoetter_433x260px.jpg/m/552x331/filters:focal())
Customer declaration:
Since 2014, the ELWA has been in operation, paired with a 2.25 kWp PV system. The installation took place in a 1,000-litre buffer storage with a fresh water station. While we usually do not utilize the optional hot water backup with mains power, this feature proved to be useful during a renovation phase in unfavourable weather conditions.
What initially appealed to me about the ELWA was the simple installation. Now, I appreciate that this solution is not only easy to install but also entirely maintenance-free. I have also acquired the USB interface from my-PV, allowing me to retrieve data and monitor both the PV thermal yield as well as the temperature profile.
On days with fluctuating weather conditions, when I inquire about my neighbour’s thermal solar system and whether it has delivered any results, he often denies it. In the meantime, my ELWA consistently generates 4 kWh of heat, even on overcast weather. It's truly a brilliant solution!
Product details ELWA:
0 – 2,000 W infinitely adjustable
Target temperature adjustable with rotary knob
Works even during power outages
For hot water storage tanks ranging from 100 – 1,000 liters
Self-consumption: 2 W
Efficiency: >99% at rated power
Optional hot water provision: 750 W
![Referenz ELWA Brandstötter my-PV](https://a.storyblok.com/f/225509/202x197/1a97f8588b/referenz-elwa-brandstotter-my-pv.png/m/1920x0/filters:focal())
With the data interface "USB Interface" and the free ELWA software, the yield data can be easily monitored.
![Screenshot Webinterface_ELWA_EN my-PV](https://a.storyblok.com/f/225509/540x420/142295b6e0/screenshot-webinterface_elwa_en.jpg/m/1920x0/filters:focal())
An integrated data logger allows, among other things, the visualization of the achieved solar yields and the temperature profile.
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