Hi Jeremy,
If there is a lot of flow and the velocity of flow is fast (>1.8m/s) then this could work fine.
You're right there is nothing about these new turbines on the Hallidays website just yet, it's all too new
Ultimately these turbines are not yet ready for market. The company in the process of raising investment, and as such is hoping to get a good understanding of just how much demand from folks there would be in both the US, EU and UK markets.
However it sounds like your friend could be a potential future customer, which is great!
Could you perhaps suggest a number in $ of what you would expect this kind of system to cost?
We have seen other types of 'Pico' sized hydro turbines that are selling at over $30k!
This new system will be a fair bit less costly than that.