As I mentioned: A typical camper van is borderline at 3300 kg already so you have 200 kg for cloths, food, water to drink, bedding, etc. It even matters whether or not you gained 10kg during winter or lost 10kg.
16kg equates to about 2 lithium ion 100WH batteries 1-2 bikes for bike tours 1 grill + extra gas for a barbecue
etc.
So you can decide between those or a conventional solar panel or you just pick panels that weight less then you can have both.