Over the ground. The wind expert at any presented locale is highly dependent on local topography and various aspects, and instantaneous wind pace and way vary far more commonly than hourly averages. 11223344556677889910101111121213131414151516161717181819192020212122222323242425252626272728282929303031310 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 ... https://ulbqbnd.wikiadvocate.com/5457669/reduce_your_monthly_bills_with_one_of_these_green_weather_suggestions