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[wholmgren]

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[spaceguy152]

Hi @wholmgren , Recently I was working with the GFS forecast function and was able to extract the data easily. One thing I noticed is that the data is not adjusted for the timezone. Is the raw data in UTC? Do we have to again convert the raw data to the required timezone?

[wholmgren]

@spaceguy152 please see #1237 and also search the pvlib python google group for related discussion. Please open a new discussion if you have further questions.

[spaceguy152]

Thank you.

[Kaesekopf]

I am just starting with python pvlib and the basic_chain function seemed a good way to get acquainted . However, one thing really wonders me. The PV-array is only described with the module_parameters argument, and there is no parameter or keyword to describe the size of the array.

Also the code suggests that only the dc- power of a single module is calculated, and when I run the function for a 250 W module and a 5kW inverter the AC output is never comes above 200W, again confirming by suspicion that only the DC output of a single module is calculated.

As a quick workaround I will make a local version of the basic_chain function with an array-inverter power ratio as additional output and a scaling of the DC output within the function. This will solve my problem for the moment, but I still have some questions:

• Am I overlooking something?
• Is this an intended feature, for example, the function is only intended to be used for so-called AC-modules (a single module connected to it's own micro-inverter). If so shouldn't this be in the documentation?
• If my suspicion is right, should this be an official issue?

[wholmgren]

@Kaesekopf please open a new discussion