Guides
Each guide answers one question well, then hands you to the tool that does the math for your rig.
Tool
Power planner
Size the battery, solar, charger, inverter, wires and fuses from what you run.
Tool
Wiring diagram tool
Drag parts, connect them and get wire gauge and fuse labels on every run.
Van electrical basics
The six parts every camper system has, how they connect, and a diagram to download.
Wire gauge and fuse chart
12 V and 24 V wire sizes and fuses by amps and run length, from the ABYC tables.
How many solar panels
What 200, 400 and 600 W of flat roof panels make in your state, month by month.
DC-DC charger sizing
20 A or 40 A, smart alternators, and what an hour of driving puts back.
Lithium conversion
Swapping lead-acid for lithium: what it costs and the three things that must change with it.
Best lithium battery for a van
Redodo and LiTime batteries by price per usable watt-hour, BMS current and cold-weather charging.
Power station vs built-in
When a Bluetti box beats a wired system, and when it costs you more.
Shore power and EV charging
30 A and 50 A plugs, what they really deliver, and charging an EV at the campground.
Boat house battery upgrade
Adding a lithium house bank beside your starting battery without cooking the alternator.