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After several studies, options and solutions I cam to the conclusion that a hybrid way is the way.
A Bluetti powerbank with multiple sources and exits that can be charged from 2 solar panels and later also from a small 220V hydro turbine, meanwhile acting as an intermediary / cache for all electrical consumption.
The compact size and multiple devices all in one is the best solution.
During the sunny days, charging from solar, during night and cloudy days,, from the river.
And is easy to install, maintain, carry (remember that I have to carry on my backpack all the material like 8km).
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I don't know much about water generators, but I know they need water in motion to run and generate electricity. I think you should find a place in the river where the water flows at a higher speed. This will allow you to get a smaller generator. 1L/s sounds a lot but perhaps is not enough. You better measure the water flow pressure gauge accurately before making any purchase. That will save you a lot of time, trials and failures, and if the water flow is not enough, you can always build a water channel to drive the water in a different path and speed, like in old mills.