Have had an idea some time and that was/is to use
engine waste heat since the thermostat is 92 degree. C
So i tested a small cell in straight tapwater today with different temperatures and measured the amp consume.
1. Tapwater at 16 degree.C used steady 0,48 amps and the output was not measured, but output was remembered for the next test.
2. Heated tapwater at over 90 C. to start with and about 75 at end of test. Amp was 0,42 and the gas output was close to doubled according to test number 1.
The bubbles looked also bigger with hot water.
Hot water reduce amps and give an higher gas output?...
This was interesting