Moving and Echoflow Delta pro's

Hello,

I will be moving soon from the Midwest to the SE, this will happen in June so it will be hot.
Using U-Pack shipping cubes. I have x2 Delta pro control units and x2 extra batteries.
I suspect the temp inside those shipping cubes is going to get pretty hot but no idea how hot.

Has anyone moved these things in the south before in shipping pods? They tell me batteries are no problem
but I could see the temps getting higher than the the max operating the manual says of 45c. Of course they wont

be operating and will be in original box's. Anyone know if this is taking a risk and what charge level should they be
under these conditions? If this is considered a risk I may have to get rid of them as I have no other way to move them.
Thanks for any info.

J