No, i have never claimed to be an expert on solar or any power generation.Cephalotus wrote: ↑Mar 04, 2018 2:09 pm
I thoght you claim to be an expert on RE?
obviously a group of solar power plants will never reach its cumulated peak output for several reasons.
1: In times of high instalaltion rates quotes for max installed capacity is at the end of the year while maximum generation is during summer months which is not at the end at least on the northern hemnisphere (so it's not so valid here)
2. solar panels do not produce their peak output on hot sunny days because of the voltage degradation when hot
3. Not all solar plants are orientated in the same way. if you have solar power plant facing west and a solar power plant facing east you will never see their cumulated maximum rating
4. At least in Germany on most days some parts are always cloudy.
5. If you have a large country the sun will not reach its zenith at the same time on different places....
1). The 7+ GW was installed capacity at the end of 2017.
The 4.3 GW. Peak output were rare isolated events during Jan /Feb 2018..... our peak summer months.
2). Yes, and i believe that can be as much as 10% loss
3) Understood, but not all will be configured like that, and we are missing 40% !
4). Yes, the weather is probably the most relavent. Unlikey Australia will have 100% clear sky over the entire country.
So i am thinking that could be 10-20% loss.
5). Peak sun time should not be a factor in the calculation. The system takes localised sample output maximums, processes them into the total installed capacity in that post area, then combines them nationally on a common time base i believe.
These together with factors like actual panel calibration, cleanliness, decreasing output with panel age, wiring and inverter efficiency losses,...etc all add up to a major discrepancy between quoted installed capacity and actual maximum ouput capacity.......by about 40% on a National scale !
Even without the "weather" variable, an individual local installation likely wont get much more than 80% od its "nameplate" installed capacity at best !
https://www.solarquotes.com.au/blog/5-r ... -expected/
However, i have a suspicion that commercial solar farms are "underrated" on output relative to the actual panel capacity installed, thus disguising most of these efficiency losses, and enabling them to easily achieve the 100% output levels recorded as i posted above