Four important things you need to know before doing a wind study:
- Choose a well-tested and accurate wind sensor with 1% or better accuracy (3 % to 5% error is standard for most weather stations). 3% error may lead to 10% loss in income and 5% anemometer error to 1/6th of your income.
Do not confuse resolution with accuracy. Some manufacturer’s only state resolution which has relevance to accuracy. Ask yourself, if wind speed resolution of 0.1mph is relevant, when my real wind speed due to anemometer error can be anywhere below or above by ±0.45mph (±3% at 15mph)?
- Always record air temperature and wind direction (if possible air pressure and humidity). Omitting these can create another 1/6th hole in your profits!
Air density plays a large role in how much electricity you can produce and is effected by temperature, height above sea level, atmospheric pressure and humidity. It is not all only about wind measurement accuracy!
- Do not use meteorological air pressure in weather reports and forecast, as it is not your real air pressure. See our Equivalent sea-level pressure calculator to see the difference. Know your height above sea level
- Follow anemometer placement rules and contact us if you have questions.