Because wind speeds increase with height, a residential wind generator is mounted on a tower.
The tower also raises the generator above the air turbulence that can exist close to the ground
because of obstructions such as hills, buildings, and trees.
Tower Height
Your wind resource will be cleaner and stronger the higher you go. The taller your tower, the better your energy output. However,
taller towers will increase the cost your installation and may not be allowed in some areas. While you should install your system in the
tallest tower allowed, It is best to evaluate your overall energy and cost payback before investing in taller towers (see diagram at right,
top).
Types of Towers
The two most common types of towers are guyed and monopole. Both are available in various designs. Some can be tilted-down for
easy access while others require a crane for installation and service (see diagram at right, bottom).
Guyed towers are less expensive than monopole towers. However, because the guy radius must be one-half to three-quarters of the tower height, guyed towers require enough space to accommodate them.
Monopole towers are more expensive but they offer the consumer an easy way to perform maintenance. Monopole towers can be
lowered to the ground during hazardous weather such as hurricanes (see diagram on next page). Aluminum towers are prone to cracking
and should be avoided.
