Progressive Dynamics - max current before overload

Great question. I have not seen an answer. I have also never read a issue of a smallish converter overloading and shutting down even with a large battery that needs significant charging.

Reality is that as you go below 50% the internal resistance of the battery is climbing fast so the demand does not increase as much as you may think. If you would to get 90% discharged you may not even get 45 amps into the batteries.

I can say my 35 amp WFCO will charge my 4x GC2 just fine from 50% and even less.