FAQs - Our Products

What are the main turbine sizes THAT Proven Energy manufactureS?

3.2kW, 6kW and 15kW

What heights are they?

The Proven 7 is available on an 11m mast, the Proven 11 is available on a 15m mast and the Proven 35 is also available on a 15m mast. Please see 'Our Products' page for further information on towers. Alternatives are available but we recommend you talk this through with your installer. The higher the tower height is, the more wind there is available thus maximising investment and increasing carbon reduction.

What are the turbines made of?

The turbines are all made of the same materials with only a few small exceptions. The blades on the Proven 7 turbines are polypropylene whereas the Proven 11 and Proven 35 blades are thermoplastic glass composite. The towers are all galvanised steel and the covers are polypropylene or hardened polypropylene. The blades of the Proven 7 will soon be made from thermoplastic glass composite to standardise the product range. One huge advantage of Proven blade materials is that they are almost entirely erosion proof - so they are able to survive in sandstorms and hailstorms where others have disintegrated!

Why do the turbines look the way they do?

The turbines are downwind so that our flexible blades can fold down in severe storms, while still running and producing, without hitting the tower. This design is the result of extensive research and testing over many years, and has the advantage of nullifying the destructive bending stresses in normal wind turbine blades.

Will turbulent wind affect my turbine?

Proven wind turbines are very unusual in that they can operate in turbulent sites that would destroy other turbine designs, this is because of our flexible self governing blade system. In a turbulent site some power loss is inevitable - so choosing a Proven Energy turbine will ensure power loss is minimised.

Why are Proven Turbines made so robust?

Surviving storms is hard work for a wind turbine- many other designs are destroyed by stormy weather. From our beginnings in 1980 Proven Energy has strived to make wind turbines that will survive no matter what the weather and Scotland has been a great base for erratic weather testing! The Proven Energy design is the result of inspiration, innovation, severe testing and over twenty seven years of development. Your investment in clean renewable energy should be enduring, an investment made not just for you, but for our children too.

What is the warranty offered?

We offer a market leading five year warranty on all of our wind turbines.

How does the turbine cope with a 1-Ph or 3-Ph site?

It doesn’t matter if the site is 1-Ph or 3-Ph as we will split the output over three Phases instead of one if it is 3-Ph. This is easy to do and incurs no extra costs.

What is the Proven QA procedure?

Every turbine is checked before leaving Proven Energy. We are working towards ISO9001 and IEC61400-2 (the new international standard for small-scale wind turbines), which will help to further ensure the quality of our turbines.