I love the energy and persistence of these "makers." After all this effort, 3-D printing parts and building a storage tank on his roof, he was able to store the equivalent of an AA battery worth of power on his roof. (15:11)
But, as he says at 16:39, "better understanding involves learning and doing."
All the water splashing off his waterwheel is wasted energy - he would've been better to use a Francis turbine: "The Francis turbine is also called a radial flow turbine, since water flows from the outer circumference towards the centre of runner. Inward flow water turbines have a better mechanical arrangement...as the water swirls inward, it accelerates, and transfers energy to the turbine." https://en.m.wikipedia.org/wiki/Water_turbine
Or a Pelton wheel - "The Pelton wheel extracts energy from the impulse of moving water, as opposed to water's dead weight like the traditional overshot water wheel." https://en.m.wikipedia.org/wiki/Pelton_wheel
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