If you scroll down in the Amazon advert, it appears that the reason for rejecting EVs could be the proximity to the 12V battery. They're looking to connect the device directly to the battery.Sorry, I didn't see that. It was just the first Amazon-preferred that I came across as an example.
I have no clue as to why it is not recommended for an EV. Perhaps that ultrasonic frequency range is also used for something in an EV? But then the USA FCC usually does a good job of isolating specific frequency ranges.
This is the one I have in my shed and also used in a prior ICE. It's no longer on Amazon USA (?) but still Amazon UK.
Triple Action Rodent Repellent ✮ GM-X Mouse Rat Repellent Ultrasonic - Patented Deep Repel Technology in Walls and Ceilings - Indoor, Garden, Back Yard Pest Control Mice : Amazon.co.uk: Garden & Outdoors
Great prices on your favourite Gardening brands, and free delivery on eligible orders.www.amazon.co.uk
"Not suggested using in the Electric or Hybrid Electric Vehicles, or vehicles with battery pack located in the rear."
