Construction costs are currently skyrocketing

Just received an offer for the photovoltaic system:

9.72kWp
3 roof sides occupied
405W modules
No storage
No wallbox

Exactly 20k gross including installation without scaffolding.

Similar for us. (BaWü)
Storage would cost about 10k€ on top.

I have to add that the buffer tank has a modulating electric heating element and the plan is for the photovoltaic system to mainly take over the heating function during the transitional period/summer, so the heat pump doesn't switch on and off so often. But that would actually be more of an argument to size the heat pump differently. hm, damn it but that's just how it is now :-/

Did the same installer also put that idea into your head? :p An electric heating element is just a backup for particularly terrible frost days when the heat pump can no longer manage. Why do you want to use an electric heater with a factor of 1:1 (heating element) (in reality there are losses) for heating when you have an electric heater with a factor of 1:3 - 1:5 (heat pump) (deliberately taking a wide range) available? Sorry @all this actually doesn't belong in the construction costs thread, we can also move to yours if you want and you have a link...

Similar here. (BaWü) Storage would cost about €10k on top.

already declined last year despite lower costs. The era of private PVs is over. It's all going to large projects, solar parks, etc. It no longer scales at 8-15 kWp. Still, I have a preparation on the roof – something will only go on there when it really pays off. And no – I will not, as an ideology-driven German, believe that I can save the world with photovoltaics while coal power plants are being built everywhere around the world. Better let those who have the money invest.

The time is coming again... especially in connection with [Wärmepumpe]....

It's just a question of what the electricity price will do in the medium term. With electricity prices double compared to before, the double photovoltaic price is certainly worth it. Especially if electric cars then drive up self-consumption in the summer in the medium term.

Really intense offer. 20K gross = net because it would probably only be installed in 2023?
You would have 24 modules and on 3 sides? Does that even make sense?

Yes, 2023. 24 modules, that is correct. It is a hipped roof with a pretty exact east/south/west orientation. Whether that makes sense, I have been wondering the whole time. Payback period somewhere between 13-15 years according to the calculation documents. Of course, there is a wide range possible.

3 roof sides with or without shade management? Anything special about the inverter? Sounds “expensive” to me initially as well but maybe already the new standard?

The inverter offered is a Sungrow SG 10 RT. Shade management is not explicitly listed. I will ask again. Thanks for the hint.

Similar with us. (BaWü)
Battery storage would cost about 10k€ on top.

Battery storage is exactly why it is not an issue for now. I hope (am waiting) for affordable wallboxes that can charge bidirectionally.

Did the same installer put the idea into your head? :p

That is exactly the case, but I will look for a conversation again tomorrow and ask for an “explanation” of the sizing.

The question is what the electricity price will do in the medium term. With double electricity prices compared to before, double the photovoltaic price certainly also makes sense. Especially if electric cars then boost self-consumption in summer in the medium term.

If only we knew that so precisely today ;-)
I once read that up to 70 cents/kWh !could! be possible by 2030. But it could just as well swing the other way – though not that drastically.