comments:
garype posted on r/vanlife4w
Do you already have a Van to add power to? If so, i recommend that you get one of these: https://www.amazon.com/dp/B0791RW8M2/ref=dp_iou_view_item?ie=UTF8&psc=1 Use it when camping on shore power and it will tell you how much power you use, then you can estimate how little you can live with.