ᐅ Photovoltaics – Questions About Taxes and Commercial Classification

Piotr1981 schrieb:

Hey,
You must be familiar with photovoltaic systems, right? How many kilowatts are you planning to install on your roof?

I’m also planning a solar power system, but I have to admit I’m a bit overwhelmed by it. Where is the best place to get information? A solar installer offered me the Ed3c system. Do I absolutely need a battery storage system that costs 9,600 euros?

Would the admin be so kind as to explain why I’m receiving another warning with the message “THIS IS THE FINAL WARNING”? I haven’t posted any links at all. You have to understand this...

I need to apologize. Although I didn’t post a link, I probably mentioned another forum too clearly.

I will try to answer as thoroughly as possible here to help the user.

1) The E3DC, like other battery storage systems for photovoltaic, may be nice, but is generally as unnecessary as a goiter! (unless you are building to KfW40+ standard)

2) Maximize the roof space efficiently! Don’t forget north-facing roofs if the pitch is below 30°.

Calculate the expected yields with a suitable tool.

Currently, prices per kWp installed on the roof are somewhat higher (due to supply and demand), but should definitely be around a net €1100-1200 per kWp maximum if done without a battery. If you install well over 10 kWp (don’t be afraid of that!), costs can drop to about €1000 or less.

There is NO 10 kWp limit, just a small threshold (proportional to the Renewable Energy Act) between 10.01 and 12 kWp, which is inconvenient; in that case, build 9.99 kWp. Up to about 35 kWp is fine, but then you need to limit the inverter to 30 kWp due to additional effort/cost.

I’m really afraid to mention the word PVG here, although this is neither advertising nor a link, but I like this forum and don’t want to get banned.

As said, more knowledge is available elsewhere.

superzapp schrieb:

I need to apologize. Although I didn’t post a link, I probably mentioned another forum too clearly.

So I’ll respond here as completely as possible to help the user.

1) The E3DC, like other battery storage systems for solar power, may be nice, but generally as unnecessary as a third wheel! (unless you’re building to KfW40+ standard)

2) Make full use of your roof! Don’t forget north-facing roofs if the roof pitch is under 30° (degrees).

Calculate the expected yields using a suitable tool.

Currently, the prices per kWp (kilowatt-peak) installed on the roof are somewhat higher (due to supply and demand). Without a battery, it should be around a net maximum of €1100-1200 per kWp (approximately $1200-$1300 per kWp). If you build significantly above 10 kWp (don’t be afraid!), costs can go down to about €1000 or less per kWp.

There is NO 10 kWp threshold, just a small step in the Renewable Energy Act between 10.01 and 12 kWp — which is inconvenient, so build 9.99 kWp instead. Up to about 35 kWp is fine, then adjust the inverter to limit output to 30 kWp because of the extra effort and costs involved.

I’m really afraid of mentioning the word PVG… although this is neither advertising nor a link, I like that forum and don’t want to be locked out.

As I said, more knowledge is available elsewhere.

No worries! I received the warning and still don’t know why?! I also can’t respond to it. Well. So it’s no fault of yours.

superzapp schrieb:

I need to apologize. Although I didn’t post a link, I probably mentioned another forum too clearly.

I’ll answer here as completely as possible to help the user.

1) The E3DC, like other battery storage systems for photovoltaic, might be nice, but they are usually as unnecessary as a goiter! (unless you are building to KfW40+ standard)

2) Use the roof space efficiently! Don’t forget north-facing roofs if the pitch is less than 30° (degrees).

Calculate the expected yields with an appropriate tool.

Currently, prices per kWp (kilowatt peak) for fully installed systems on the roof are somewhat higher (supply & demand), but without a battery they should be around €1100-1200 net per kWp at most. If your system is significantly over 10 kWp (don’t be afraid of that!), then prices can be around €1000 or less. There is NO 10 kWp limit, only a small threshold (proportional Renewable Energy Act).
Between 10.01 and 12 kWp is inconvenient, so build just under 10 kWp (e.g., 9.99). Up to about 35 kWp is okay, then the inverter is regulated down to 30 kWp because of additional effort and costs.

I’m really afraid to mention the word PVG here, even though it’s neither advertising nor a link, but I like the forum and don’t want to be banned.

As said, more knowledge elsewhere

I already have a quote.
€11,000 for 8.58 kWp (26 panels). East/South roof with 24° pitch. Do you know how much the panels weigh per square meter? The structural engineer said the roof can support up to 15 kg/m² (3.1 lbs/ft²).
Can you send me a private message?

In my opinion, a storage system only becomes cost-effective below 600€/kW capacity, and current storage systems are still well above that. That’s why we don’t have storage and will install it later when the costs have decreased.

I have a system with 19.4 kW because of the hip roof. So, I can’t fit that much on the roof.

And overall, I have produced 9.8 MWh since January.