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acceptable deviation from PV Sol simulation results


Vishnu
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I have been working on PV Sol quite for sometime designing and simulating PV systems. We try to convince the customer based on the PV Sol simulation results. But simulation is something which we do making many assumptions and the actual results might vary. the question is, as we are talking about a system which has to last for the next 20-25 years and there are many dynamic parameters involved, what is the acceptable deviation in system performance ( annaul generation, specific yield, ) from the simlated results?

do you have any idea if there are any regulations on the market in Germany for this ?

P.S: Let us assume that we don't have any new objects casting shadow on our system in the future and there is timely inspection and maintenance performed

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Hello Vishnu,

I'm not sure I understand your question(s) correctly.

I am not aware of any regulations due to the simulation deviation in Germany. If you are looking for simulation accuracy, there was a test from NREL (a bit older, https://www.valentin-software.com/en/references/pvsol-software-test) and a comparison of simulation results with measurement data from two different PV systems, which we published in a German PV magazine (https://www.valentin-software.com/sites/default/files/fachartikel_vertraege_bei_verschattungen_18-06-pvd-valentin.pdf).

Kind regards,

Marcel

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