If a renewable energy source hasa calculated 10kw potencial (constant), will i be able to make 10kw form it ?

Question

if i mount a permanent magnet generator to work with this water flow, will i be able to harness these 10kw or will there be losses leading to considerable lower output from the generator?

Answer 1

10 kW is a rate of energy flow per unit time, either being used or generated. It is not a potential.

Perhaps you are stating that a water flow has the potential of generating 10 kW of power? If that is so, then a water turbine and generator will be able to utilize most of that. There will be losses in the turbine and in the generator. Perhaps 10 percent in each, perhaps more, depending on the speed of the water flow, and the turbine design.

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Answer 2

in case of water based energy source one can harness full potential as long as the flow remains above required limit for rated energy output. It is assumed that 10 kW is calculated at output point. thereafter there will be distribution losses as usual depending on length and type of conductors.