Small Wind Energy: Definitions

German Wind Energy Association (BWE):

The German Wind Energy Association defines small wind turbines
as wind turbines up to 100 kW of rated power. However, they are small
only in comparison to the very large turbines. For domestic purposes a
turbine up to 30 kW is more realistic. This is also where the Renewable
Energy Sources Act [EEG] sees the limits for “House Service Connections
as the Most Economical Point of Connection.”

British Wind Energy Association (BWEA):

The British Wind Energy Association [BWEA] regards small wind systems
as those with an output of up to 50 kW. It further differentiates between
“small wind” (more than 20 kW) and “micro wind” systems
(up to 20 kW).

IEC-NORM 61400-2:2006

Another definition is put forward by the standard IEC-NORM 61400-
2:2006 (“Design requirements for small wind turbines”). Accordingly,
small wind turbines include all plants where the swept rotor area is
smaller than 200 square meters at 350 W/m2. This results in a maximum
output of 70 kW.