Comparison of Small Residential Wind Turbines - Roof Mounted
- Roof Mounted Residential Wind Turbines.
Windterra ECO1200, 1.2kW Vertical Axis Wind Turbine
This is a vertical axis wind turbine and as such can handle the wind from multi-directions and speeds.
Windterra chose VWAT’s as they operate quieter than the conventional horizontal axis turbines. The ECO 1200 is slow revving (190RPM) and more acceptable of turbulent air prevalent in the built-up areas where buildings and trees disrupt air flow, which reduces noise.
The ECO 1200 has 3 blades designed for optimum performance in all wind speeds but particularly in lower wind speed range.
The turbine has been specifically designed for rooftop mounting incorporating fully adjustable roof pitch mountings.
Honeywell WT 6500 Gearless Blade – Tip Power System
This is a new concept in rooftop wind turbine power generation, where the power is not produced by a normal in-line generator. Instead the power is generated on the turbines blade tips (where the maximum speed is attained).
The turbine is of circular design of 5’7" diameter, with the blades running concentrically from a bearing in the centre to the tip. The tips carrying the magnets act as the rotor, with the rim being the stator. The very low cut-in speed is 2mph and the turbine operates up to 42 mph when it shuts down. It has a “Smart box" incorporating a power controller, inverter, wind direction, and speed control.
The unit can be mounted on the rooftop or on top of a mast, but has been specifically designed to operate on a rooftop, being able to operate in turbulent winds from different directions.
Cost is $6495 (£4144).
Swift RD 1.5kW Rooftop Turbine
This is a roof mounted turbine with 4 mounting kits available to ensure the turbine receives the optimum wind speeds and conditions with specifically designed mounting system with damping to reduce vibration.
It has a rated power output of 1.5kW at 450RPM and a cut-in speed of 8 mph. The rotor diameter of 6', and a dynamic brake shuts the system down in the case of over speeding.
It has a diffuser ring surrounding the blades, which reduces noise to 35dB (A), it carries a manufacturer’s warranty of 2 years, and it costs from $2400 (£1500) depending on outlet.
Below is a table showing some key criteria to use when choosing a roof mounted wind turbine, please click to enlarge.