Sounds like you have got a good location there. I assume the 6ms is at 10m. So your wind speed at turbine height would be 6.3 say. This is a very good wind speed. Placing a turbine on a slope is good but you may want to investigate this further as it is often best not to place it at the crest of the hill, because the wind speed drops as the wind escapes the compression of the slope. Slightly down the slop may be better.

As to the output. No Proven owner I know has ever got anywhere near the output they predict, But then the perfect roughness conditions the outputs are predicated upon are very rare (the Isle of Lewis et al) but you will get a very good output at your site. If your site is open ground, without trees and hedgerows.

I am on course for an output of 3000 kWh a year or more. My wind speed is 5.7/5.9ms at 10m and the area is quite rough with some trees and houses around my turbine 6 kWh on a 15m mast.

Some else I know in Kent with the same turbine with 5.9/6ms at 10s has a record of 11,000 kWh in three plus years. He is set in open farm land but with a bank of large trees in the prevailing wind direction.

The Hockerton Housing Project have a 6kw Proven on a 25m guyed tower. The reckon they get about 5000 kWh a year. They have a wind speed of 4.5ms. So the tower height here is the important factor.

I would not be surprised if you could achieve 8000+ units a year.

In Scotland on some of the islands I am told through my ROC seller that some Provens have 30,000 kWh.

Hope this helps. Have look round the site as there is loads of other bits that can help you,

Stuart

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Stuart

what sort of information on the installation are you looking for?

There is a set of photos showing the process here: http://www.flickr.com/photos/caerdelyn/sets/1297165/

ted

Ted - my exam question is 'is there anything that you now know about the process of purchasing, installing and commissioning a turbine that you wish you knew at the outset'!

Best wishes and Happy New Year
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Simonridout

Hopefully this successful application will help others in National Parks or other sensitive areas.

The next step is to make a successful grant application. Any tips or advice will be greatly appreciated, including what to expect from the process, how long it takes, does it involve an inspection of my house?
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Simonridout

How easy was the grant process. How did they verify that you have an insulated house etc. I believe that this is a new requirment?
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Stuart

Money for the grant is allocated monthly, January's had run out, so I stayed up and applied a few minutes after midnight on the 1st of Feb, to be certain, however information from the telephone helpline suggests that the money lasts till mid month before running out.

The grant is basically a 'cashback' after completion of the installation, together with a certificate of completion from the installer and receipted invoices for the work.
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Simonridout

Let us know how you get on and do please post some pictures.

Good luck

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Stuart

Simon Ridout
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Simonridout

is this transformer dedicated just to your house or shared with neighbours?

It could be a 5kVA unit which means it is designed to only handle a sustained throughput of 21 Amps (5000/230). The fact that you have an 80 Amp fuse from the grid doesn't mean that you can actually use that much for other than short periods. (Fuses are there to protect the cables from melting.)

If the DNO thinks you will be exporting 26 Amps (6000/230) for extended periods then they will want to upgrade the transformer.

Can you find out what size the transformer is?

ted

The transformer only supplies my house, however it was undersized for when the farm was a working farm with high power demand for milking coolers etc. Therefore it was 'tapped up' to give 253 volts to maximise power output. This makes it sensitive to high input voltages, causing the windyboy inverter to trip out, unless there is a high load in the house.

I will report developments. The next step is to get the export meter fitted and sign up to sell the excess and ROCs.
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Simonridout

Do you have two 3000 inverters or one 6000?

It would be good to see some pics of your turbine.
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Stuart

JPEG and GIF image files are supported, photos will usually be JPEG. Don't forget to shrink the image to web resolution before uploading - I tend to resize mine to 320x240 or 640x480 pixels, or thereabouts.

Using the 'Attach' button on the preview page for a posting, you can browse to find a file on your local machine and then upload it.

Choose the appropriate file format from the drop down menu on the attachment upload form, and enter a brief description of the file, then hit 'Upload'.

Once it's uploaded, use the 'Return to display of content' link to get back to the preview page, where you can hit the 'Attach' button again if you want to upload a second file. Repeat as necessary.

Cheers
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Website Administrator

This should have been picked up by your installer when they made the enquiry to the utility company prior to quoting. They should have then included the cost of the transformer upgrade in the quote, so that it would only attract 5% VAT, and be included in the grant fundable works (even though with a Proven 6 you would have 'maxed out' on the grant"

When an installer carries out a site visit, prior to quoting, grid connection capacity is one of the things they should be looking at to make sure that your proposed installation is viable.
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Windy Miller

Investigation showed a blown capacitor, which is being replaced. A better over volt protection system is being fitted next week. In the mean time the turbine is free wheeling and in my first 3 months of operation I will have had 2 months of down time and only 200 KWH generated, all rather disappointing. While my high mains voltage, due to my transformer having been 'tapped up' makes my inverter shut down, I refuse to accept this as a cause of the problem, it would be no different from if there was a power cut during a period of high winds.

Has anyone else had problems of the turbine over volting when the inverter has disconnected and is trying to start up?
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Simonridout

High DC input voltage is not related to your high AC grid voltage. The two are completely seperate, so you are right to refuse to accept the connection between the 2. High DC voltage when the turbine is unloaded is a result of poor speed control. Other words on this at...

www.renew-reuse-recycle.com/showarticle.pl?id=944

Over-voltage on the grid is a seperate problem, yet one which also needs resolving, as it results in unnecessary downtime. Your utility company perhaps need re tap your supply transformer again so that your supply voltage is within 10% of 230V. If you are regularly tripping on G83/1 overvoltage, it sounds like your supply voltage is too high, even when not generating. Bear in mind that a few years ago, the UK nominal voltage reduced from 240 to 230 volts. If your supply was tapped to 240V + 10% (264 volts), its now way over the current maximum of 230 + 10% = 253 volts.

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Windy Miller

http://picasaweb.google.com/thornflatt/turbine
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Simonridout