We have a small solar thermal system on the roof. This was mandatory because we have a gas heating system (heating station with storage tank from the company Wolf). We wanted to finally find out how effective our system actually is. At first, we thought we were just not able to find the data on the display. After a lot of back and forth with the heating company, it turned out that our system does not have a heat meter. "The system only saves about 5% anyway. And we only installed it because it’s legally required," was the response. I’m quite surprised by this... This is the first time I’ve heard that. We paid a lot of money for it but have no way to verify what the system actually delivers. Is that common?
How is it for you? What kind of savings do your solar collectors provide? Can you read out your heat output?
Best regards,
Steffi33
How is it for you? What kind of savings do your solar collectors provide? Can you read out your heat output?
Best regards,
Steffi33
Steffi33 schrieb:
"The system only provides about a 5% savings anyway.But in my opinion, even that should be based on knowledge rather than belief. I find that statement pathetic – every laptop can fairly accurately estimate how much battery life it has left. Surely, in a modern rocket technology boiler, it can only be a minor component.https://www.instagram.com/11antgmxde/
https://www.linkedin.com/company/bauen-jetzt/
Hello
Not all solar controllers show the energy yield in kWh.
For those that do, the accuracy depends on the correct settings.
Typically, a building unit’s hot water heating should not run from May to September, except during periods of bad weather.
Much more important than knowing how many kWh are saved is to use the system as efficiently as possible.
This means, for example, running the dishwasher and washing machine in the afternoon hours, cooling down the solar storage tank this way, and enabling further use of the solar collector.
Olli
Not all solar controllers show the energy yield in kWh.
For those that do, the accuracy depends on the correct settings.
Typically, a building unit’s hot water heating should not run from May to September, except during periods of bad weather.
Much more important than knowing how many kWh are saved is to use the system as efficiently as possible.
This means, for example, running the dishwasher and washing machine in the afternoon hours, cooling down the solar storage tank this way, and enabling further use of the solar collector.
Olli
wrobel schrieb:
Hello
Not all solar controllers display the energy yield in kWh.
For those that do, the reading is only as accurate as the settings allow.
Generally, a domestic hot water heating system for the living unit should not operate from May to September, except during periods of bad weather.
More important than knowing how many kWh are saved is to use the system as efficiently as possible.
This means, for example, running the dishwasher and washing machine in the afternoon, cooling down the solar storage tank, and allowing further collector operation.
OlliBut solar thermal systems are supposed to support the heating... right?
We also have a gas heating system... and I’m glad we didn’t install solar panels on the roof... in summer, when the output is highest, I hardly need any heating power... since from May to September I only use about 80 m³ (2829 ft³) of gas... that’s only around 40 to 50 euros...?
I don't see anything wrong with that. This is how it is done in the vast majority of cases. A standard thermostat from the heating technician is installed, which usually only allows you to read the temperatures.
Anything beyond that is considered an extra service, meaning it costs extra.
Anything beyond that is considered an extra service, meaning it costs extra.
wrobel schrieb:
For example, scheduling the use of the dishwasher and washing machine in the afternoon to cool down the solar portion of the storage tank and allow further use of the collector.
Olli Previously, I considered the idea of generally supplying washing machines and dishwashers with hot water to save heating costs (gas instead of electricity), although cold water usage would still be necessary, for instance, when washing clothes with cold water. After researching, I learned that not every washing machine or dishwasher is suitable for hot water supply. Was I misinformed, or do you own such appliances?
Now, our contract for the construction project states:
Is there anything specific we should pay attention to?
My colleague, who has already built a house with a solar system on the roof, also said, "From May to September, the solar water heating is enough for my showering needs."
I am wondering now—so I can better understand if the solar system is working efficiently—is it acceptable to turn off the heating during this period?
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