MoHHO, I am not intending to sell these, I just want to show how easy is to build them so that everyone can do this. Also this design might not be perfect, will need to do some testing.

Anyway, today I tested the output of this electrolyzer. I used distilled water with a teaspoon of KOH in one liter electrolyte ratio. The cells were arranged so that they formed five six-cell compartments in parallel. Two plates were left unused. This way I could reach the max amps (20) on my power supply at 15V, that is alot better, because with my previous design I had to step the voltage up till 27-29V to get the max amp flow. I am sure that with more electrolyte I could achieve the same amps at 12V or even less voltage. I measured the output and it was 2 litres in one and a half minutes at 20A 15V input power. That is 300W of power. I am sure that I could get the same amps at lower voltages with stronger electrolyte solution and if I can get the volts as low as say 10V then I will get the same ammount of gas using only 200W

There is a small issue of the foam problem. The spacing between the plates is so small (3mm) that the foam climbs very fast till the upper plate holes and gets in other cells via those holes. I must level the water about 30mm below the holes to solve this problem. I will try to use 4mm vinyl for spacers, maybe this will help to reduce the foam problem a bit

I did not measure the output of my previous cell so I am not able to compare the results, but it seems alot better. Maybe someone can tell me if my numbers are efficient? How much gas per how much imput power would be considered to be a good result?

Thanks,
Jetijs