Start With the Use Case
Before choosing batteries, cabinets or a bed layout, define how the van will actually be used. A weekend camper has different power, water and storage requirements than a full-time off-grid build. Write down the number of travelers, typical trip length, climate, cooking style, bathroom needs, work-from-van needs and how often shore power will be available.
Choose the Van Around the Layout
Mercedes-Benz Sprinter, Ford Transit and Ram ProMaster are common US conversion platforms, but each has different interior dimensions, roof heights, payload ratings and service considerations. Measure the exact vehicle you own or plan to buy rather than designing from generic internet dimensions.
Plan the Build Sequence
A practical sequence is: inspect and clean the shell, address rust or damage, finalize the floor plan, plan wiring and plumbing routes, cut exterior openings, install ventilation and windows, insulate, rough-in electrical and plumbing, close walls and ceiling, build cabinetry, install fixtures, test every system, then finish trim and organization. The exact order changes by design, but hidden systems should be tested before they become difficult to access.
Treat Electrical and Water as Systems
The electrical system should start with a load list and an energy estimate, not with a battery purchase. Plumbing should start with tank location, service access and winterization strategy, not with fittings. Thinking in systems prevents components from competing for the same physical space.
Document the Build
Keep a simple build book with cable sizes, fuse locations, plumbing routes, model numbers, receipts and photos taken before panels are closed. That documentation is valuable for troubleshooting, resale and future upgrades.
What to Learn Next
The most useful next topics are van conversion cost, electrical planning, solar, plumbing, insulation and layout. Those guides are linked below so you can plan one subsystem at a time without losing the overall sequence.
Turn the research into a build plan
The free guides on this site explain individual decisions. The Van Conversion Manual is designed to keep the major systems organized in one complete digital reference for the project.