I’ve been interested in the potential for micro-hydro for ages but never been able to find a suitable system that would work with the large head, small flow streams that many smallholdings would have. A couple of weeks ago I was working at the Royal Welsh Agricultural Show as part of my role with the Horticulture Wales project, imagine my surprise then when I saw this in the same tent as our stand!

It’s a 7kW system, put together by a really interesting not-for-profit group called The Green Valleys. They spend their time helping landowners to install micro-hydro and have a range of systems from 1.5kW  upwards.

There are a lot of challenges – the cost of pipes and grid connections amongst them – but the economics are really very interesting.

If you consider a turbine like this, and assuming your stream never dries out, here’s how much money you’d bring in from the Feed-In-Tariff:

7kW x 24 hours x 365 days x 20p per kWh = £12,264 / year

Not bad! And when you consider that a simple installation would start from £25k, it could be a fantastic investment.

And that’s before you even consider the environmental benefits that come from producing 61.3 MW of green electricity each year!