June 9, 20206 yr comment_3936 Hello dear PVSol team, I have a few questions! Which results are more precise when applying feed-in control. should the minute values be activated for <10 kWp PV systems? Is there a specific diffuse radiation model that gives better results in this case? Thanks in advance and best regards! Report
June 9, 20206 yr comment_3939 I am not sure about diffused radiation model but it is a good pratice to activate minute values when DC/AC ratio is above 1,15 and with batteries. It almost takes forever for the simulation but still Report
June 9, 20206 yr Author comment_3940 Thanks for your reply Vishnu! the DC/AC ratio is always around 1.0! Report
June 10, 20206 yr comment_3950 Hi K24, as Vishnu pointed out, the activation of minute values is most of all important if you have sizing factors of above 115 %, or if you have battery systems or electrical appliances that are involved. If your DC/AC ratio is about 1, and you just want to analyse the feed in, you might be well off with hourly values. But I would always recommend to compare the results at least once. Just simulate your PV system with hourly values, save the results somewehre, and then simulate the same system with one-minute values. Then you'll directly see the differences for your specific case. Our recommendation for the diffuse model is Hofmann (disclaimer: that is me), but we don't recommend it just like that, we have scientific evidence that it performs best under nearly all conditions (especially when using one-minute resolution). See more on diffuse irradiation models here: https://help.valentin-software.com/pvsol/2020/calculation/irradiation/diffuse-irradiation/ Kind regards, Martin Report
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