We have 2 X 80 watt panels also, but just 1 inhouse battery and 2 for tug, we find it okay but person who installed panels said we should look at getting another battery for van, we have led lights and 140 litre compressor fridge, only gas to stove/oven, what about you...............
2 batts in tug, 2 batts in van, led lights and a full size fridge, gas only to stove same as yours, 2 waters tanks with seperate filling one for drinking the other for showers.
when you get the 2nd batt for the van I have been told to replace them both at the same time, as the original one will pull down the new one, not being an electric expert I did as advised.