Skip to content Skip to navigation

Get data from PVWatts


Error message

  • Deprecated function: Array and string offset access syntax with curly braces is deprecated in include_once() (line 3473 of /is/htdocs/wp1148320_ISA6Q7ZC2Y/drupal7/includes/
  • Deprecated function: The each() function is deprecated. This message will be suppressed on further calls in book_prev() (line 775 of /is/htdocs/wp1148320_ISA6Q7ZC2Y/drupal7/modules/book/book.module).

PVWatts uses the term "DC rating" for the more customary  term "kilowatt peak" (kWp). 

Go to and select your location. On the page beginning with "Station Identification" enter a DC Rating (kW) of 1 (one).

PVWatts system spec

Click 'calculate' and you get the results page. The right half of that page will look similar to this (with different values, obviously) :

PVWatts results

The value to use in PVCalc is the annual AC Energy (kWh) value, it is the annual AC energy produced per kWp (kilo Watt peak).

PVWatts PVCalc