(Watching the Olympics)
uh huh...... yup - just watching

Sadly - there is no product accredited for hydro. Or installer. But - as Ted says - its kW x hours per day x 19.9p - assuming that you make power 24/7/365 - which is unlikely in most small / pico / micro hydro installs.
Please tell us more.
Hopefully i will be in a position to tell you more in the next few days,
wish me luck
