ᐅ Accept an offer for a 16 kWp photovoltaic system at this time?
Created on: 14 Dec 2022 20:27
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Pitiglianio
I need your opinion on the following offer for a photovoltaic system.
Gable roof with a 23-degree pitch, fully covered on both sides with a total of 40 modules, approximately 16-17 kWp, depending on the modules available at that time.
Southwest orientation, no shading.
No battery storage.
Includes all installation work, scaffolding, connection, and registration: 28,000 net.
House details: Single-family home, 135 sqm (1,452 sq ft), KfW 55 standard, air-to-water heat pump, controlled ventilation system, 3 occupants, aquarium, possible electric car in 2 years. Estimated annual electricity consumption: 8,000 kWh.
Gable roof with a 23-degree pitch, fully covered on both sides with a total of 40 modules, approximately 16-17 kWp, depending on the modules available at that time.
Southwest orientation, no shading.
No battery storage.
Includes all installation work, scaffolding, connection, and registration: 28,000 net.
House details: Single-family home, 135 sqm (1,452 sq ft), KfW 55 standard, air-to-water heat pump, controlled ventilation system, 3 occupants, aquarium, possible electric car in 2 years. Estimated annual electricity consumption: 8,000 kWh.
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Marvinius29 Dec 2022 16:43i_b_n_a_n schrieb:
Please do not take the size suggested by @xMisterDx seriously. It is completely wrong. With the proposed size, an estimated 10-30% of the electricity needed for a heat pump would still come from the roof even in December and January. There are certainly other opinions, which assume an almost complete failure of photovoltaic production especially in December and January.
KingJulien29 Dec 2022 18:20What does that have to do with opinion?
There is the weather and system size, both are facts and completely independent of opinion.
There is the weather and system size, both are facts and completely independent of opinion.
So my system produced 480 kWh in December 2020, 273 kWh in 2021, and 187 kWh in 2022.
The values for January were 179 kWh in 2021 and 387 kWh in 2022.
That is definitely better than nothing, although of course significantly less than the total consumption during the same period. And yes, weather has a strong impact on the yield. When it snows and stays cold afterwards, the panels are covered, and sometimes there is no production for 2-3 weeks.
The values for January were 179 kWh in 2021 and 387 kWh in 2022.
That is definitely better than nothing, although of course significantly less than the total consumption during the same period. And yes, weather has a strong impact on the yield. When it snows and stays cold afterwards, the panels are covered, and sometimes there is no production for 2-3 weeks.
halmi schrieb:
When the panels are completely covered with snow, it’s game over because nothing happens anymore.I also get an error message from SolarEdge: "Snow on the system".