In Europe, most purchase rates lie in a EUR60-100/MWh range, although the European average (inflated by some particularly high values) is EUR102/MWh. That average is quite a generous rate, adequate for a wind farm costing as much as EUR1800/kW to install at a site with a mean wind speed of 7 m/s, often found in windier countries but harder to achieve in central Europe.
Payments within a range of EUR70-80/MWh are adequate to support wind farms at sites with mean wind speeds around 7.5 m/s that cost EUR1500/kW to install - the average cost for a median sample of projects taken from a 4 GW database for 2009. A 7.5 m/s wind speed is fairly typical for many good wind farm sites in Europe, North America, and elsewhere. Germany, with relatively low wind speeds, needs a slightly higher rate given the installed cost of wind farms there. China manages with a lower rate as installed costs are lower.
The average European offshore tariff, according to the European Renewable Energy Foundation, is EUR129/MWh, which is well matched to offshore wind farms built at the average current cost, around EUR3400/kW, installed at sites with mean annual wind speeds around 8.5-9 m/s. The Ontario Power Authority is perhaps setting a challenge to its offshore developers by offering a lower rate of EUR119/MWh.