Did you see the new placard here:With mixed systems this is the appropriate sticker to apply, it indicates that there is rapid shutdown but that the panels stay energized on the roof within the array boundary.
Typically a directory is applied that shows first responders which is which. PM me if you want one.
I have 3 arrays:
2021: 4 kW, rapid shutdown string inverter, I think mid circuit interruptors limit the voltage around 3 panels worth (which I think is around 120V)
2008: 2.5 kW, string inverter, so the array I think here is over 400V (this is the one might surprise a first responder)
2002: 10 kW, 48V inverter, the arrays is 48V nominal so