But consumption has more to do with what size battery you need. Solar will charge whatever batteries you have (slower or faster). Even if I had dual 6 volts (so lots of capacity) I personally would not go to bigger/heavier panels.
I love my 200 watt Zamp, even though it does weigh 49 lbs. I've gotten used to the weight. I do have two 6-volt golf cart batteries to store the solar power. I decided I wanted to buy a suitcase once for the next dozen years or so, so I bought the largest suitcase that was available.