We are using PVsyst for simulation and compare the results with the real data. We see that energy values per hour are not the same, often the e.g. peak is moved +1 or +2 hours (yes, we already took away summer/winter time). Among other theories why that is so, we would like to know how PVsyst calculates the average of the hourly production.
1. Is there a calculation for values within an hour, or does PVsyst take all the values for 1:00pm from the sources (e.g. radiation at 1:00 from meteonorm) and calculate a value, assuming this will be the average of the coming hour?
2. Does PVsyst calculate values within the hour, and then generates an average of that? And here it would be interesting how this is done. I made an example (see figure):
all the values of that hour are put to the begin of the hour
all the values of that hour are put to the end of the hour (i.e. the begin of next hour)
the values for 1:00pm are taken +/-30min around that hour
something else 😀
Thanks, Steve
