We received a quote from the electrician for a 10 kWp photovoltaic system. However, I am wondering whether investing in a 10 kWp system is really cost-effective or if a smaller system might be sufficient. Our four-person household consumes around 4,500 kWh in our rented apartment without a heat pump. In our planned single-family house (140 m² (1,507 sq ft), KfW 55 standard), there will be an air-to-water heat pump and possibly an electric car in the future. I am not familiar with the energy consumption of heat pumps, but wouldn’t 8 kWp or even less be enough? We do not want to feed electricity back to the grid, and the feed-in tariff is not a reason for us to choose a larger system.
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MeinHaus452 Feb 2022 11:12netuser schrieb:
For a 10 kWp system, the price should be around 1300-1400 EUR gross to be reasonable. Anything else, especially significantly more expensive, is not appropriate.
Do we always calculate prices including installation?S
Stefan0012 Feb 2022 11:17netuser schrieb:
For a 10 kWp system, the price should be around 1,300 to 1,400 EUR gross to be considered reasonable. Anything else, especially significantly more expensive, is not appropriate. The question is to what extent "reasonable" refers to 2020 or 2021. But unfortunately, you first have to find other providers in order to get comparable offers.
MeinHaus45 schrieb:
Do we always calculate the prices including installation?For us, the installation was done on Friday 😉
... but yes, I mean prices including installation. In our case, for an 11 kWp system with scaffolding, etc., it was 1350 EUR/kWp (approximately 1350 EUR/kWp). Mind you, no “cheap crap” was installed, but high-quality modules and inverters from German manufacturers.
However, I am also aware that it can be significantly more expensive. With some exceptions, it can even be cheaper if you wanted to 🙂
Tolentino schrieb:
I think there was something good about individual power optimizers.
I don't remember exactly, but I recall one provider saying that even without shading, they can be beneficial... Basically, they need to "pay for themselves." Per kWp, I would calculate 3 optimizers for 3 modules; an optimizer also costs a significant amount (material at least 50€). This should be taken into account in the calculation.
Stefan001 schrieb:
The question is to what extent "reasonable" refers to 2020 or 2021. But unfortunately, you first need to find other providers in order to get comparable offers. In our case, 2021.
A friend of mine also recently had a 13 kWp system installed at a reasonable price (from a different provider) just two months ago. It is clear that nothing is exactly comparable 1:1 and that there are regional differences as well.
That is why I mention this only as a general guideline, since there are very wide price ranges—even within the same regions.
Some offer it for less than 1500 EUR per kWp, while others want 2500 EUR per kWp for the same capacity. I have seen it all.
borxx schrieb:
Basically, they need to "generate their money." For each kWp, I would count on 3 optimizers for 3 modules; an optimizer also costs a significant amount (material at least 50€). This should be taken into account when calculating.Ok, that sounds reasonable, but how much does an inverter cost? Aside from the extra space in the utility room, which I might not have...Similar topics