Make the assumptions visible

Check the numbers.

Plan build loads, charging and autonomy assumptions · Budget water use and storage · Check dimensional bases · Work through payload limits · Inspect electrical/plumbing interfaces · Compare heating and cooling references

Sink and countertop inside a vintage camper — Photo: Connor Scott McManus · Pexels. Generic vintage-camper context; not pilot plumbing, tank capacity or drinking-water safety evidence.

Dimensions: inches ↔ millimeters

One inch is exactly25.4mm. Converting an overall dimension does not establish a cutout or clearance.

A simple energy-use scenario

Watts × hours = watt-hours. These are your assumptions, not a guarantee of a refrigerator’s daily consumption, battery autonomy or safe electrical design.