ruby_pvwatts
Provides a wrapper for NREL PVWatts v5 API. Currently only supports JSON format. Usage: You need to pass in an API Key, which is obtained from the NREL. Additionally, you'll need to include a hash of at least the required parameters. See http://developer.nrel.gov/docs/solar/pvwatts-v5/ for more information.
This is a work in progress and will have multiple updates coming soon.