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Hourly Generation Data

Shashank Sharma

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Hello Pvsyst,

My question is regarding the hourly generation (E-Grid) in .csv format which is generated from the Advance simulation < output file. From that CSV file I want to find out the generation data from 9:00 AM to 10:00 AM but I want to understand whether these provided hourly data of a particular hour is additional of previous hours or a separate generation data for a particular hour.

Example: In below table we can see that the percentage difference or percentage share of 6:00 to 10:00 AM, when I consider cumulative generation from 9 to 10 AM (Fig 1) the percentage is around 30% but when I consider only generation of 10AM (Fig 2)the % share is around 12%. So I want to know that for % share of 9 to 10 AM which one is correct (Fig 1 or 2).


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The hourly output files in PVsyst contain one line per hour, and the timestamp labels the beginning of the time interval. For example the hour labeled '10:00' is the hour from 10:00 to 11:00.

In the hourly output files no aggregation at all is performed, each line represents an individual hour.

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