install a power inverter in the vehicle and hard wire to the battery (just be sure to shut it off when you're done).
or try these.
https://www.sealskincovers.com/index...arcovers.html?
https://www.carcoverusa.com/covercra...car-cover.php?
https://www.tarpsupply.com/car-covers.html?
http://hailblankets.com/about.php
you can also throw a thick comforter on the car before you put the cover on to increase thickness and resistance to larger hail stones.
if you can figure out how to arrange shipping (they wont ship out of Australia) via a courier or something, you can get one of these sent over. They are by far the best on the market.
http://www.coverworld.com.au/
Sent from my iPhone using Tapatalk