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Economic evaluation & self-consumption
https://forum.pvsyst.com/viewtopic.php?f=25&t=4317
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Author:  TAu [ Wed Feb 27, 2019 8:12 am ]
Post subject:  Economic evaluation & self-consumption

Hello, I am trying simulate a situation where the "self-consumption" should be 100% and "sold energy to grid" should be near 0%. I have created a CSV-file of the daily user's needs and used that in the "self-consumption" of the Main parameters.

So why is the "self-consumption" in Economic evaluation 0 kWh/year and the "Sold energy to grid" basically all produced energy, and how do I change it? It messes up the Financial results, because PVSyst thinks I want to sell all the produced energy.

Thanks

Author:  AndrĂ© Mermoud [ Fri Mar 01, 2019 12:14 am ]
Post subject:  Re: Economic evaluation & self-consumption

Before analyzing the economic evaluation, please analyze first the energy output of your simulation.

I don't understand well what you have specified on your CSV file: with CSV reading, PVsyst only accepts hourly consumption values, not daily values.
If you want to create a PV system ensuring 100% self-consumption, it should be of sufficiently low power for never exceeding the User's needs, even by clear sky conditions.

Author:  TAu [ Mon Mar 04, 2019 8:34 am ]
Post subject:  Re: Economic evaluation & self-consumption

Quote:
Before analyzing the economic evaluation, please analyze first the energy output of your simulation.

I don't understand well what you have specified on your CSV file: with CSV reading, PVsyst only accepts hourly consumption values, not daily values.
If you want to create a PV system ensuring 100% self-consumption, it should be of sufficiently low power for never exceeding the User's needs, even by clear sky conditions.
Thanks, Andre.

I realized that the self-consumption has to be in hourly consumption values, like you said. I had the self-consumption in daily consumption values and that's why in the economic evaluation all the generated power was on the "sold energy to grid" row.

Author:  zafris [ Wed Mar 06, 2019 10:44 am ]
Post subject:  Re: Economic evaluation & self-consumption

Quote:
Quote:
Before analyzing the economic evaluation, please analyze first the energy output of your simulation.

I don't understand well what you have specified on your CSV file: with CSV reading, PVsyst only accepts hourly consumption values, not daily values.
If you want to create a PV system ensuring 100% self-consumption, it should be of sufficiently low power for never exceeding the User's needs, even by clear sky conditions.
Thanks, Andre.

I realized that the self-consumption has to be in hourly consumption values, like you said. I had the self-consumption in daily consumption values and that's why in the economic evaluation all the generated power was on the "sold energy to grid" row.
Thanks for the info, where can I find a file to make my owns calculations?

Best

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