lio45 6-7 m/s is apparently the year-round average wind speed at that location
You need to run your capacity factors.
It's not 6-7m/s constantly. It peaks and lulls.
The best way to see this in a small sample is on ventusky over 1mth. Because you can see real past wind data there. Log the speed twice a day there, drop in spreadsheet, then see how it fits into the turbine models power curve that you're looking at (not all turbines publish this, esp on consumer end).
Then run it against your turbine capacity (10kw, 50kw, etc).
TLDR: Average wind capacity factors range from 30-50%. It produces its rated power, 30-50% of the year.
So say a 10kw turbine at 50% capacity factor (very good). That's 5kw for 8,760hrs per year or 43,800kWh per year. At $0.05/kWh sell price to grid, that's $2,190/yr earnings.
Turbine cost $22k (from above)
Payback ~ 10yrs. (But excludes construction, foundation, hookups)
But now imagine that turbine cost $5k. Completely changes the game add makes wind a home run winner.
