Good morning,
Yesterday, we received a quote for a photovoltaic system. Our construction of the single-family house will start in October 2023 and is expected to be ready for occupancy in September 2024.
We have an annual electricity consumption of about 3000 kWh for our household, plus an unknown amount for the air-to-water heat pump (Weishaupt Biblock).
Our roof is oriented exactly south with a 25° pitch (gable roof). According to the calculation in the quote, the entire south roof is fully covered with modules (20 units), and the north roof is also equipped with 5 modules.
Attached you will find the details of the quote. The price is €20,900 net with battery storage and €15,900 net without storage.
What do you think of the offer? From what I understand in the discussions here on the forum, it is advisable to skip the battery storage. That would bring the cost to just under €16,000, which is a bit over €1,600 per kWp. That seems relatively expensive, doesn’t it?
Thank you very much in advance for your help.
Best regards,
Elias
Yesterday, we received a quote for a photovoltaic system. Our construction of the single-family house will start in October 2023 and is expected to be ready for occupancy in September 2024.
We have an annual electricity consumption of about 3000 kWh for our household, plus an unknown amount for the air-to-water heat pump (Weishaupt Biblock).
Our roof is oriented exactly south with a 25° pitch (gable roof). According to the calculation in the quote, the entire south roof is fully covered with modules (20 units), and the north roof is also equipped with 5 modules.
Attached you will find the details of the quote. The price is €20,900 net with battery storage and €15,900 net without storage.
What do you think of the offer? From what I understand in the discussions here on the forum, it is advisable to skip the battery storage. That would bring the cost to just under €16,000, which is a bit over €1,600 per kWp. That seems relatively expensive, doesn’t it?
Thank you very much in advance for your help.
Best regards,
Elias
D
Deliverer29 Apr 2022 17:34Snowy36 schrieb:
I don’t feel like filling up the entire roof…Why, what else would you do with it? ;-)Just for an electric car, you need 20-30 kWp if you want to charge it at 70-80% from the roof. A small battery in the basement won’t help with that at all.
Anyone who stops before all roofs are fully used will soon regret it. Because you can only consume (or store, for that matter) what you produce. And especially those who want to drive in winter or even heat their home need every, but really every available surface.
H
Hausbau 5529 Apr 2022 18:13I analyzed the yield per roof area separately and then allocated the solar panels accordingly. South (S) and southwest (SW) facing roofs provide a calculated yield of 1005 kWh/kWp. I fully covered these roofs and my garage (SW) with panels. In total, there are 36 modules with a capacity of 13.68 kWp. The northeast (NE) and northwest (NW) roofs would have produced less than 700 kWh/kWp, which was too low a yield for me.
Snowy36 schrieb:
But I am more interested in self-sufficiency, and that is why a storage system is better…. Self-sufficiency is exactly the main reason for installing a large photovoltaic system. Yes, a storage unit increases the degree of self-sufficiency, but only if there is something to charge the storage during the winter. Otherwise, it will just sit unused for several months, discharging and risking deep depletion.
Deliverer schrieb:
Why, what else would you do with it? ;-)
Just for an electric car, you need 20-30 kWp if you want to cover 70-80% of the charging from the roof. A small battery in the basement won’t help much with that.
Anyone who stops before all roofs are fully equipped will quickly regret it. Because you can only use (and, if you want, store) what you produce. And especially if you want to drive in winter or even heat your home, you need every single available surface.
Well, I don’t have around 40K lying around, and my electric car only has 30 kWh, and that will stay that way.
I ordered 9 kWp at €1400 per kWp, plus a 7.7 kWh battery for €530 per kWh (all net prices).
The garage is already completely full anyway, and I don’t really want that thing installed near my bedroom—feels like a woman’s thing (-:
We’re helping out a bit too, so maybe something else will be sorted during installation in the end.
D
Deliverer29 Apr 2022 18:48What many people don’t know: photovoltaic panels on the roof protect against harmful cosmic radiation! ;-)
Well, that’s fine. You can always retrofit later. And at €530 per kW, you definitely didn’t get overcharged. Still, I’d guess that starting from October, you might occasionally wish for a few more kW of capacity.
In any case, I wish you lots of fun with your system – even just 9 kW can be a lot of fun and sometimes even addictive! 🙂
Well, that’s fine. You can always retrofit later. And at €530 per kW, you definitely didn’t get overcharged. Still, I’d guess that starting from October, you might occasionally wish for a few more kW of capacity.
In any case, I wish you lots of fun with your system – even just 9 kW can be a lot of fun and sometimes even addictive! 🙂
N
Neubau202229 Apr 2022 18:50Snowy36 schrieb:
I don’t have around 40,000 lying around, and I have an electric car with only 30 kWh (18.6 miles) battery capacity, and that will stay that way.
I ordered 9 kWp with 1,400 € per kWp and a storage system of 7.7 kWh (4.8 miles) for 530 € per kWh (all net prices).
The garage is going to be completely full anyway, and I don’t really want to have that thing installed in my bedroom, feeling-wise … maybe a woman’s thing (-:
We are helping out too, so there might still be some discount when it’s installed in the end.Honestly, I don’t think the modules look ugly. We have 13.26 kWp and I think that will increase over time since only two sides of the roof are fully equipped.
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