Okay, that states a peak consumption of 110W, with 70W being ‘typical’. 8A at 12V gives 96A (the voltage would normally be above 12V so that gives some margin for error). 8A for 8 hrs = 64Ah, which is the total usable capacity of a 120Ah battery. As Loddon states above, that’s a very large draw; something like three times what you’d expect a fridge to use in 24 hours. To decide how large a battery bank you’d need to power the device you absolutely must do a power audit of all I your other items.
I believe your biggest problem will be in generating the power daily to replace what you use in each 24 hour period, particularly in the winter when even a large solar setup cannot be relied upon. If you’re intending to be based in a marina or other mooring with mains power then it won’t be as much of a worry.
Please come back with your audit calculations along with whether you’re planning on being marina based or continuously cruising.
@Tony Brooks has some information to assist you with carrying out an audit here:
http://www.tb-training.co.uk/MarineE05.html#The power audit