PVWatts V1 user_poa Assign Array

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MDuarte
Topic Author

28 Feb 2017 20:18 #5185 by MDuarte

PVWatts V1 user_poa Assign Array was created by MDuarte

Good evening Paul,

I have yet another question regarding the usage of POA values, this time in PVWatts v1. I´ve enabled usage of POA values by setting "enable_user_poa" to 1, but this returns an error, asking me to assign values to the array variable "user_poa"

To do this I´m trying to use the vbassc_data_set_array Function, but I´m running into trouble there.
I have my POA values in the last column of my weather file, but don´t know how to use the set_array function to retrieve that column as an array, could you help me out with this?

I´m guessing it should look something like this:

vbassc_data_set_array p_data, "user_array", value, length

But I don´t know what values to assign to value or length.

Thank you (once again!) for any and all help,

Kindest regards,

Miguel Duarte

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Paul Gilman

28 Feb 2017 22:01 #5186 by Paul Gilman

Replied by Paul Gilman on topic PVWatts V1 user_poa Assign Array

Dear Miguel,

The

user_poa

array should be a single column of data with 8760 rows.

You will have to write code in VBA to extract the data from the weather file and read it into a VBA array, and then use the vbassc_data_set_array() function to set the value of the SSC input.

Best regards,
Paul.

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MDuarte
Topic Author

01 Mar 2017 19:04 #5187 by MDuarte

Replied by MDuarte on topic PVWatts V1 user_poa Assign Array

Dear Paul,

Just to clear one last thing, for the data_set_array function, the "value" shall be the name of the array I create, and length shall be 8760, correct?

Thank you so much for your time,
Kindest,

Miguel D.

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