kjs55

Operating PVsyst V6.12 It is uncertain whether the negative energy values correlate with the randomized dates / times when the systems is not operational. It appears that summing the 8760 hourly energy values (both positive and negative) in Excel yields the same annual value as what is reflected in the PVsyst output report. I would have expected energy production to be zero during the times when the system is not operating (not negative). Please advise as to whether this is a bug or not.