Electric Load Data Input Clarification

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lwkerber
Topic Author
New Member

27 Aug 2016 21:13 #4724 by lwkerber

Electric Load Data Input Clarification was created by lwkerber

I have an an extract from a utility for one year kWh energy in 15-minute time increments. The utility has a time of use and weekday/weekend rate schedule. I understand that:

The first data point is considered January 1 but for weekday/weekend, SAM assumes the first data point is considered a Monday. Correct?

SAM seems to expect data in kW, so I multiplied my 15-minute kWh data by four to approximate kW power before I loaded it. Monthly kWh and kW both looked fine on the "Input Time Series Load Data" screen, but when I did a "Create Report" the "Annual Total Demand" (kWh) was 4 times what the actual demand was in the load file. Peak power was fine.

What am I doing wrong? Is there an easier way to do it?

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Paul Gilman
Platinum Member

29 Aug 2016 21:05 #4725 by Paul Gilman

Replied by Paul Gilman on topic Electric Load Data Input Clarification

Hello,
Would you mind [url=mailto:sam.support@nrel.gov?subject=15-minute%20load%20data t=_self]emailing me[/url] the file with that load data so I can investigate?
Best regards,

Paul.
 

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lwkerber
Topic Author
New Member

31 Aug 2016 01:53 #4726 by lwkerber

Replied by lwkerber on topic Electric Load Data Input Clarification

Sure. What is your email?

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Paul Gilman
Platinum Member

31 Aug 2016 15:23 #4727 by Paul Gilman

Replied by Paul Gilman on topic Electric Load Data Input Clarification

Sorry -- the term "emailing me" in my reply above should be a link to email me. My email address is sam dot support at nrel dot gov.

Best regards,
Paul.

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Paul Gilman
Platinum Member

31 Aug 2016 16:33 #4728 by Paul Gilman

Replied by Paul Gilman on topic Electric Load Data Input Clarification

Hello,
There is a bug in the PV PDF report template for residential or commercial systems when you use sub-hourly load data. In your case, your file used 15-minute load data, and the report shows a total annual load value four times the correct value.
Here is a link to download a template that corrects the problem:
pv.samreport (82.5 KB)
Replace the template file in your SAM installation with this new template. In Windows, the file is in C:/SAM/2016.3.14/runtime/report. To find the file on a Mac, please see  this description of how to display the package contents.)
Thank you for pointing out this problem.
Best regards,

Paul.

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