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
A quick question for those here who are more experienced. How common is energy self-sufficiency with photovoltaic systems these days? For example, if the public electricity grid goes down, can you at least maintain emergency power for your own house with just a battery storage and the photovoltaic system, or do you need to plan for something additional?
kbt09 schrieb:
Is it then possible to at least cover the emergency power supply of your own house with storage and photovoltaics?Yes, it is possible! There are various manufacturers that offer this emergency power operation as an upgrade. For example, it is available from E3/DC. The battery can even be recharged during the day by solar power.
S
sergutsch23 Apr 2022 08:52kbt09 schrieb:
...or do you also have to plan for something there?An emergency power supply must be planned from the start, one that supports backup operation. Most standard ones do not have this capability. The few that do are somewhat more expensive.B
Benutzer20023 Apr 2022 09:03kbt09 schrieb:
How common is energy self-sufficiency as a standard feature in photovoltaic systems?It works with the right hardware. However, in my opinion, it is unnecessary for 99.9% of cases and will therefore remain a marginal phenomenon.I had the optional feature offered to me. It would have required an additional disconnect switch with otherwise identical hardware. The extra cost was around €1200 net, so I decided against it at the time. Seriously though, how often has the power gone out for more than one hour in the last 20 years? For me, it happened exactly twice: once for 2–3 hours during the day due to a fire at the substation—I was at work and wouldn’t have noticed it at home. The second time was many years ago when an excavator cut the underground cable in the street. That outage lasted about 3 days just before Christmas, but during that period, the photovoltaic system wouldn’t have provided enough power anyway for an independent emergency operation...
@Deliverer
I have a question. Currently, we are having issues with delivering our desired system. I need one with 3 strings because of the hip roof.
The panels will cover the south, west, and north sides. The roof has a 22° slope.
Now the electrician suggested using only one with 2 strings and combining the west and north sides. What is your general opinion on this, and if it is acceptable, what conditions should be considered?
Thank you
I have a question. Currently, we are having issues with delivering our desired system. I need one with 3 strings because of the hip roof.
The panels will cover the south, west, and north sides. The roof has a 22° slope.
Now the electrician suggested using only one with 2 strings and combining the west and north sides. What is your general opinion on this, and if it is acceptable, what conditions should be considered?
Thank you
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