AXIS Q6045-E Blackout When Below -30

I have 9 of these in field and when temperature goes below -30 or if windchill goes to -45 to -50 then i get the black screen with insufficient power to run ptz message type of response. I know the problem is the poe switch cant supply enough power to run ptz video and heater at once. I have spoken to tech support but didn't get a fix for it. I reboot unit but only works for while. I wish unit had an option to accept 24 volts becuase power can be supplied quite easily. I am thinking about closing the air vents somehow for winter then outside air intake will be reduced,or insulating the plastic outside dome to reduce heat loss.I am using poe switch provided with unit and cameras are in close proximity to poe injector. Any ideas ot others experience this issue?

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