Today i build a water tower similar to the suggested here : http://wiki.industrial-craft.net/index.php?title=Water_Mill
But cause there aren't any switchcables, I left them out.
I've build 2 layers so far with copper cable, linked to an redstone powered (RP) LV transformer-> MV-Transformer(RP)->HV Transformer(RP)-> and back to LV again.
It all runs into a Batbox.
So by math of IC-Wiki its should produce 1,6 EU/t or less due to loss but measuring at the copper cables linking the water mills to the LV following happens:
As far as I can tell it does not affect the batbox, so theres no energy loss, but its a real pain in the *** for wiring.
It does produce energy.
Oh and before someone gets all smart about measurment of HV, its not an HV cable I measured on.
Sincerely Bierhamster