ᐅ Issues with the installation alignment of our planned solar power system

and some others like both and can afford it as well

and that's perfectly fine too
whether it’s women, heat pumps, photovoltaic systems, biomass, or the great kitchen
everyone can choose what suits them best

Olli

Mmmh, I am just a woman. Then the money is gone. [emoji56]

That does not necessarily have to be a bad thing, even with a tight budget.

wrobel schrieb:
Hello,

What Mycraft described is correct.

Increasing the storage volume, for example to 300 liters (80 gallons), only marginally improves the solar coverage ratio.
Therefore, and to keep systems as compact as possible, manufacturers often offer 200-liter (53 gallons) tanks for single-family homes.

I was quite surprised, though, because in a recent discussion I was told that heating systems should be as inexpensive as possible to purchase.
In this context, a domestic hot water heat pump combined with photovoltaic panels is recommended without objection.

It’s not about biomass here, where you can certainly invest more money.

Olli

Unfortunately, solar thermal systems are often sold by developers at a high price and installed poorly from a technical standpoint... You realize this when suitable protective measures don’t work because there is too much hot water in summer, or when the circulation is so bad that the pipes are pushed to their limits... In the end, after just a few years (barely outlasting the warranty), the system fails.
Then it becomes a money pit.

I’m simply assuming there is no heating load calculation, since the heating system (gas/oil) is wildly oversized.
The explanation for this: "We always install that..."

P.S. A domestic hot water heat pump works fine without photovoltaic panels.
However, photovoltaic makes even more sense in this case.
By the way, photovoltaic essentially pays for itself.
Solar thermal saves a bit on hot water costs for the conventional heating system.
Photovoltaics save electricity and even bring in money when there is surplus... But beware: this involves a bit of paperwork (tax office/distribution network operator...).

I am interested in the costs for solar thermal systems.

A domestic hot water heat pump without installation and with an integrated 300-liter (80-gallon) storage tank can be purchased for about 1,500 to 2,500 euros. (Brands like Stiebel Eltron, Weishaupt, Feinwerk, novelan, Viessmann, etc.) The installation effort including transport typically takes less than half a day with two workers.

I am simply assuming that the builder charges almost 1,000 euros for the 280-300 liter (74-80 gallon) hot water storage tank alone. The solar thermal panels cost around 3,000 euros, and the installation likely takes 1 to 2 days with two workers.

I only know what the plumber charged for our entire house: 17,000 gross. For that, he provided a Junkers gas boiler, underfloor heating for 108 sqm (1160 sq ft) of living space, solar thermal for hot water with a storage tank, bathroom with two sinks and two toilets, all Duravit with Grohe fittings, matching shower set, a Helios exhaust fan with humidity control, electric towel radiator, two outdoor taps, utility sink, washing machine connection with angle valve, dishwasher connection, and kitchen connections.

So, the solar system can't be that expensive.