The Hourly PV Performance Data

• About The Hourly PV Performance Data
  
  • Format
  • Example


• Saving The Hourly PV Performance Data To a Text File
  
  • In MS Internet Explorer™
  • In Netscape, Opera, Mozilla or Safari

The values reported for AC power in the PVWATTS Hourly Performance Data Output are associated with the preceding
hour; i.e., the hour ending at the time indicated. Time is reported as Local Standard Time (LST). Daylight Savings Time
(DST) is not used.

The Hourly PV Perfromance Data output has the following format:

• Header:
  • Title
  
  
  • Site information:
    1. Site location: city and state.
    2. Latitdue, longitide and elevation (meters) of site
• Data:
  • Column Headings
  
  
  • Data:
    1. Date-Time Stamp: Year^*, Month, Day, Hour (LST)
    2. AC Power in Watts

                                                                                                     
  ^*NOTE: Year is TMY2 Year; i.e., the year from which the
                associated month's data, determined to be
                "meteorologically typical" for the site, was taken.
                                                                                                     

Example PVWATTS Hourly Performance Data Output, Header and Data:

PVWATTS: Hourly PV Performance Data DODGE_CITY, KS     37.77° N     99.97° W     787 m Array Type: Fixed Tilt     Array Tilt : 37.8°     Array Azimuth: 180.0°     AC Rating: 4.0 kW Month, Day, Hour, AC Power (W) 1971, 1, 1, 01:00, 0 1971, 1, 1, 02:00, 0 1971, 1, 1, 03:00, 0 1971, 1, 1, 04:00, 0 1971, 1, 1, 05:00, 0 1971, 1, 1, 06:00, 0 1971, 1, 1, 07:00, 0 1971, 1, 1, 08:00, 0 1971, 1, 1, 09:00, 848 1971, 1, 1, 10:00, 1949 1971, 1, 1, 11:00, 1994 1971, 1, 1, 12:00, 2927 1971, 1, 1, 13:00, 3222 1971, 1, 1, 14:00, 3143 1971, 1, 1, 15:00, 1323 1971, 1, 1, 16:00, 1582 1971, 1, 1, 17:00, 412 1971, 1, 1, 18:00, 0 1971, 1, 1, 19:00, 0 1971, 1, 1, 20:00, 0 1971, 1, 1, 21:00, 0 1971, 1, 1, 22:00, 0 1971, 1, 1, 23:00, 0 1971, 1, 1, 24:00, 0 1971, 1, 2, 01:00, 0 1971, 1, 2, 02:00, 0 1971, 1, 2, 03:00, 0

The output seen in the previous windw, PVWATTS: Hourly PV Performance Data, exist only in your browser window.
In order to save it to your harddrive you will need to do the following:

• In MS Internet Explorer™:
  1. Make the window containing the hourly output active,
     either by clicking on it or by selecting it from the Window menu.
  
  
  2. From the browser's File menu choose Save As.
  
  
  3. Change to file name, if desired.
  
  
  4. Indicate where you wish to have the file saved.
  
  
  5. Select file format Plain Text.
  
  
  6. Click Save.
  
  


• In Netscape, Opera, Mozilla or Safari:
  1. Make the window containing the hourly output active,
     either by clicking on it or by selecting it from the Window menu.
  
  
  2. In the Edit menu, click Select All.
  
  
  3. Next, select Copy from the Edit menu.
  
  
  4. Open a new plain text document in your favorite text editor.
  
  
  5. Select Paste from the Edit menu.
  
  
  6. Ssave the new text file to your hard drive, giving it an appropriate name.
  
  

The new file can be opened in a text editor, and, with a little editting, imported into MS Excel™.

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