Saw your Post, last eve, on the MNSolar Forum, but, now, even that Thread is missing (!).
I had wondered, if a simple HV PV Disconnect switch might do for your application.
For only two strings, a combiner or breaker is not required.
The following example of such a switch in NOT for outdoor use, so, if you must have this function, outdoors, this would probably not fit:IMO SI32-PEL64R-4 Enclosed True DC Solar Isolator | Northern Arizona Wind & Sun (solar-electric.com)
FWIW, HNY, Good Luck, Vic