Circuit breaker is just going to trip on and off, a cycle timer
No good for his needs
He needs to turn down the power use of the charge output when on limited line power
The only thing I can of is a large impedance between converter and batteries
Something to make the converter think the batteries are charged
It would need to be adjustable, and with stand heavy amp discharge, or removed from circuit, maybe a large varistat
The magnum probably does the job at the switching circuit , limiting the cycle to limit the amps
Yes I said converter, I know PT wants another combo inverter~chartger unit
We are taking about charging, and I did not want to add to the confusion
He wants to control power draw when charging from 15 amp circuits
But have more capability when using generator or campground power
Most of us solve this by multiple chargers or almost never using duplex power circuits and relying on generator power to charge batteries to the maximum we can achieve, this is what he was doing to immediately before the failure