Construction costs are currently skyrocketing

2022-08-25 13:05:31

And how do you consume the 30,000 kWh/a that a 30 kWp system produces? You probably feed about 25,000 kWh into the grid at 6,x cents/kWh. I mean, that makes me happy, solar energy hardly gets cheaper for the public. But financially, that's not worth it for you, is it?

Probably less now. But on the less productive roof sides electricity is generated when you need it most. So in the afternoons/evenings. So it’s not that stupid to equip those sides as well. Just get information in the expert forum. At that size you should have an electric car and a battery. My 13.26 kWp system will be connected to the grid on 08/30. I’m curious myself how it will be :cool: It’s definitely worth it. The price back then was about €1,030/net per kWp (full-black, power optimizer, etc.).

2022-08-25 13:12:33

We do have underfloor cooling and are quite satisfied with it so far, but only because it cost us little/no extra charge :)

That was also the consideration. 2k wouldn't be exactly a small surcharge, but still somewhat reasonable, and combined with geothermal energy, I find the concept quite neat. But 4k is definitely another level, especially since I also think we'd only want to run it during really hot times. Currently, the idea is to observe first and maybe retrofit later, which is why I'm asking if anyone knows what such a retrofit would cost. What exactly does the air conditioning preparation include? Of course, it's a bit late now to make major changes to the plans, because upstairs in the hallway, for example, we no longer have any possibility for a drilling at the exterior wall, as it's a large pane of glass ;)

2022-08-25 13:13:31

And your electric car will then be charged daily with 50 kWh in the summer, so for 250-300 km? ;) And how big is your storage? 20 kWh? You fill that up with a 30 kWp system in 4-5 hours in July... and then?

I don't want to discourage you, and your solar installer has probably calculated everything perfectly. If you enjoy it, great! But financially worthwhile? No way.

PS: Especially not at the prices currently being asked.

2022-08-25 13:15:51

That was basically the consideration as well. 2k wouldn't be hardly an extra cost but still somewhat reasonable, and in combination with geothermal energy, I find the concept pretty clean. But 4k is then a whole different ballgame, especially because I also think that we would only want to run it in really hot times. Currently, the plan is to first observe and maybe retrofit later, hence the question if anyone knows what such a retrofit would cost.
What exactly does the air conditioning preparation include? Of course, it's a bit late now to make major changes to the plans, because in the upstairs hallway, for example, there’s no possibility for a drilling on the exterior wall anymore, it’s a large pane of glass ;)

They manage that with the brine-water heat pump as well. It cost an extra €4,200. The reason was that digital room temperature controllers are needed for that and that the extra cost is high. I’m curious to see.

2022-08-25 13:17:27

That was also the consideration. 2k wouldn’t be much of an extra cost now but still somewhat within reason, and in combination with geothermal energy I find the concept pretty neat. But 4k is then quite a different magnitude, especially because I also tend to think that we would only want to run it during really hot times. Currently the idea is to first see how it goes and maybe retrofit later, which is why the question is whether anyone knows what such a retrofit costs. What exactly does the air conditioning preparation involve? It’s obviously a bit late now to make big changes to the plans, because, for example, in the upstairs hallway we no longer have any possibility for drilling on the exterior wall, that’s a big pane of glass ;)

I imagine it would be very unpleasant to walk on a 15°C cold floor in the height of summer because the house is being cooled above it.

2022-08-25 13:17:41

And your electric car will then be charged daily with 50 kWh in summer, so for 250-300 km? ;)
And how big is your storage? 20 kWh? You fill it up in 4-5 hours in July with a 30 kWp system... and then?

I don't want to discourage you and your solar installer probably calculated everything very well. If you enjoy it, great!
But financially worth it? No way.

Somehow I have the feeling that you only read what you want to read. I never wrote that I want to do it. Only that I could on the roof. It is not even planned to expand it, as I don’t yet know how well I manage with the 13.26 kWp. So calm down a bit and please read more carefully.

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Construction costs are currently skyrocketing

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