Fuchur
2022-12-30 13:18:17
- #1
About 1cm of snow is still okay, then it's over
Accept offer for 16kwp photovoltaic at this time?
- Erstellt am 2022-12-14 20:27:47
Bausparfuchs
2022-12-31 18:02:41
- #2
A photovoltaic system does not produce 10 - 30 percent in December/January as is often spread here by some uninformed people. That is completely unrealistic.
My system produced about 700 kWh of electricity in August 2022. In December 2023, which is ending today, it was only 30 kWh (4%). Anyone expecting electricity for the heat pump will be disappointed. No matter how large the system is, more than 5 percent of the nominal capacity does not come out.
With snow or frost on the system, nothing works at all.
My system produced about 700 kWh of electricity in August 2022. In December 2023, which is ending today, it was only 30 kWh (4%). Anyone expecting electricity for the heat pump will be disappointed. No matter how large the system is, more than 5 percent of the nominal capacity does not come out.
With snow or frost on the system, nothing works at all.
Fuchur
2022-12-31 18:30:14
- #3
I don't understand your entire percentage calculation...
30% of what? And who claims that? My yield forecast assumes 1.7% in December and 2.5% in January. Of course, this is based on the annual production. The expectation assumes that the modules are not covered, so snow periods are excluded. My real values are listed above, anyone can calculate it, though it is of little use, because, as I said, the winter weather strongly influences this. I also have never seen anyone claim to be completely self-sufficient with a heat pump in winter. But having or buying 400 kWh per month is also a contribution to the bigger picture.
Whatever 4% means to you. 4% of August? What kind of calculation is that when everyone knows August is not the highest-yielding month.
That is complete nonsense. In good weather, I easily have >20% in December, and I don't even have a south-facing system, and part of the area is shaded until noon. I can gladly provide logged data on that.
That has long been disproven as well. Frost almost doesn't matter, a thin layer of snow up to about 1 cm still works quite well, then it drops off.
The main thing is to just claim something...
A photovoltaic system does not produce 10 - 30 percent in December/January as some ignorant people here claim. That is completely unrealistic.
30% of what? And who claims that? My yield forecast assumes 1.7% in December and 2.5% in January. Of course, this is based on the annual production. The expectation assumes that the modules are not covered, so snow periods are excluded. My real values are listed above, anyone can calculate it, though it is of little use, because, as I said, the winter weather strongly influences this. I also have never seen anyone claim to be completely self-sufficient with a heat pump in winter. But having or buying 400 kWh per month is also a contribution to the bigger picture.
My system produced about 700 kWh of electricity in August 2022. In December 2023, which is ending today, it was only 30 kWh (4%).
Whatever 4% means to you. 4% of August? What kind of calculation is that when everyone knows August is not the highest-yielding month.
No matter how big the system is, more than 5 percent of the nominal power does not come out.
That is complete nonsense. In good weather, I easily have >20% in December, and I don't even have a south-facing system, and part of the area is shaded until noon. I can gladly provide logged data on that.
With snow or frost on the system, nothing works.
That has long been disproven as well. Frost almost doesn't matter, a thin layer of snow up to about 1 cm still works quite well, then it drops off.
The main thing is to just claim something...
kbt09
2022-12-31 18:38:26
- #4
Even my small balcony power plant with 600 watts has already generated 12 kWh this December. And we also had snow and the sun was so low that for the short time, even 1 or 2 hours, the south module was always half covered by the house opposite. But this is getting better day by day now. 12 kWh is of course really more of a symbol, but I am looking forward to the sun rising again now.
By the way, I have only been operating this balcony power plant since mid-November. In half of November, it already generated 13 kWh. And I am very curious to see how the individual months will develop.
By the way, I have only been operating this balcony power plant since mid-November. In half of November, it already generated 13 kWh. And I am very curious to see how the individual months will develop.
DaGoodness
2022-12-31 20:41:52
- #5
So my 10 kWp system produced exactly 294 kWh in December. I consumed 1150 kWh. That means I generated 25% of my December consumption myself. Just because you didn’t get more (for whatever reasons), you can’t just transfer your experience to all other systems.A photovoltaic system does not produce 10 - 30 percent in December / January as is spread by some ignorant people here. That is completely unrealistic. My system produced about 700 kWh of electricity in August 2022. In December 2023, which is ending today, it was only 30 kWh (4%). Anyone expecting electricity for the heat pump will be disappointed. No matter how large the system is, more than 5 percent of the rated capacity does not come out. When there is snow or frost on the system, nothing works.
i_b_n_a_n
2022-12-31 20:52:24
- #6
My system is of course not representative. In addition, I use it to charge my fully electric vehicle with an average of about 1200km per month (December was a bit more), which naturally improves the self-consumption rate significantly. I have not yet recorded the figures for the separate heat pump electricity in the table... My system has only 6.5KWp, but is winter-advantageously oriented exactly 45° to the south. The intended system of the original poster will achieve different (worse) winter values. But the 1290KWp per installed KWp is more than I and the solar installer had expected ;-)
