ᐅ Pellet-Solar Combination – Issues During Summer?

Created on: 15 Apr 2021 14:41
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XxTankerxX
Hello everyone,

I am currently in discussions with the first heating installers. The centerpiece will be a pellet heating system (15 kW) — either ETA or KWB. Since I’ve only heard good things about solar combination systems, I want to implement this as well. I expect to almost completely save on pellet consumption during the summer, as solar should be sufficient for domestic hot water preparation.

After talking with the heating installer, I am now a bit uncertain. He mentioned problems with such a combination because in summer, too much heat is generated (since very little water from the buffer tank is used), and the glycol in the solar panels can partially evaporate due to overheating. Instead, he would prefer to use photovoltaic panels and support the heating with an electric heating element. This issue is new to me, and I couldn’t find much information about it online either.

What do you think? Maybe one of you has experience with either of these heating technologies.

Best regards,
XxTankerxX
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Bertram100
16 Apr 2021 16:12
"...a pellet heating system being ecological..."

That used to be true, that pellets were ecological. When they were not yet so popular, they were often made from wood waste chips generated in the furniture industry. That was really efficient. Nowadays, the demand exceeds the amount of usable waste, so additional wood has to be used.