Should I go ahead and shut the panel breaker off if temps below -11?

[sunbelt57]

I have a Classic 150 Lite with a VFX3648 Outback inverter (see attach below)
According to the classic sizing tool, my system will go into hypervoc at -11. Its supposed to get down to -20 or so in a day or two. Should I just go ahead and shut the breakers off at the panel or will the Classic 150 Lite do that for me? Or can I sit there and watch the input voltage gauge on the local status app and go out there and shut it off if it looks like its going too high?

[ClassicCrazy]

The voltage would be high when there is no load on the system like when the sun first is out or I think when the Classic is sweeping and you won't see that happen . That is when there is Voc ( open circuit voltage) . I am assuming you are talking about F temps and not C.
So to be safe turn your PV breaker off if it is going to be that cold at night . The other thing you could do if accessible and possible you could disconnect one pv panel from each series string and then you would be within the safe range ( if two pv in series would be high enough voltage to charge - run calculator with just two in series )
Larry

[sunbelt57]

I waited till around 10:30 to turn the panels back on. I wasn't sure about the temp - my infared thermometer was all over the place and the weather app said -25, so I flipped it on and WOW it started pegging (current limit reached @ 70A). Almost 5kW in the last 1.5 hours.

[Weldman]

Don't worry you can't hurt it, mine went down to -40°F went over hyper VOC. All it did was started clipping till I shut one breaker down then remedy the problem.