Dissolve the sugar and citric acid together in the water, mash the banana thoroughly and add it. Add the yeast, fill everything into a tall container (e.g. plastic bottle) and let it ferment for 2 weeks at 20-25 ° C. Screw on and shake once a day, otherwise always leave it open.
At the end of the fermentation time, strain the banana wine and store it well chilled in a glass bottle.