The Tararua capacity factor compares with an average load factor of around 80% for coal, gas and nuclear. While lower than that, the achievements at Tararua illustrate that wind power can produce significant amounts of power. The wind farm produced 0.4% of New Zealand's electricity last year.
Output projections from wind farms in Britain further illustrate that wind power production is significant, even if the wind does not blow all the time. The average capacity factor for 38 UK wind farms with a combined capacity of 258 MW is 33.1%.
Calculations of "capacity equivalents" for wind plant allow comparisons with thermal power stations. Adding 1000 MW of wind around Tararua would be equivalent to 612 MW of thermal plant, states WindStats, while 1000 MW of UK wind plant at typical locations would produce the same energy as just under 400 MW of thermal plant