Hello all !

Can someone help me ?

I'm trying to simulate a PEM water electrolyser in COMSOL.

But I get this error.

No potential condition found. Problem may have infinitely many solutions.

- Node: Water Electrolyzer (we)

I think that is because I haven't defined a ground potential (a reference potential) in one of the electrodes,

But, which, how I can do this, and what value ?

Thanks for help,