"Small water flow generator" is not a general-purpose device, and the specifications, models and parameters are not given, so it is impossible to answer.
The switching power supply in question has an input of 220V. Even though its operating voltage range reaches full voltage (85~265VAC), it cannot adapt to the voltage 50 V input. So it can't work.
You may wish to provide detailed parameters of the generator (a photo of the nameplate is also acceptable), as well as the voltage and wattage you require for the electricity, so that we can give you a more complete idea. plan.
You said "the hydroelectric generator generates 220 volts at its output". In fact, it can have tens of thousands of volts, like the one in the Three Gorges.
Since wind strength is usually at level 7 or 8, like wind at level 4 or 5, its strengthThis motor is not large, the speed of the motor will not be high, and the output voltage is proportional to the speed, so the voltage is generally not very high. The designs of different generators have different characteristics due to their different driving forces.