Plan safe DC wiring on the go and sync with VoltPlan for full system design when you are back at your desk.
Android version coming soon
Plan safe 12V wiring for your camper van, RV, boat, or off-grid build. Wire sizes, fuse ratings, and solar layouts are calculated for you — so you get it right the first time.
Start Your Wiring DiagramNo signup required • Free 12V wiring diagram creator • Export anytime
Plan safe DC wiring on the go and sync with VoltPlan for full system design when you are back at your desk.
Android version coming soon
From blank canvas to finished wiring diagram in minutes
Pick a starting point for your RV, boat, or off-grid project.
Add components, connect wires, and size your cables.
Download your diagram or share a live link with your installer.
Plan your RV's 12V system online with our free wiring diagram creator. Design complete camper electrical systems with solar panels in series or parallel, battery banks, and shore power connections.
Start RV Wiring Diagram
Design basic 12 volt boat wiring diagrams with our free marine wiring diagram software. Create complete marine electrical systems with proper DC wiring, battery switches, and navigation electronics.
Start Boat Wiring Diagram
Design off-grid solar power systems with our 12V wiring diagram creator. Create solar panels in series diagrams, parallel configurations, and complete battery bank setups for cabins, tiny homes, and remote installations.
Start Solar DiagramEverything you need to design your electrical system online
Create complete RV wiring diagrams with our intuitive drag-and-drop interface. Design shore power connections, battery systems, and 12V distribution panels.
Marine wiring diagrams for boats of any size. Plan your basic 12 volt boat wiring diagram with the right marine-grade components, wire sizes, and fuse ratings.
Design solar panels in series diagrams or parallel configurations. Calculate optimal solar array sizing for your power needs.
Free online 12V wiring diagram creator with automatic wire sizing calculations and component validation.
Generate wiring diagrams programmatically with our open-source MCP server. Connect your AI assistant or automation tooling to VoltPlan via the Model Context Protocol.
View on GitHubDC electrical news for campers, boats, and off-grid builds
A weekly roundup of inverter releases, BMS firmware updates, battery cell news, and product launches from the DC-power world. Same folks who build VoltPlan, curating what matters for people wiring real systems.
Read The BusbarExpert guides on RV electrical system design, 12V wiring diagrams, marine wiring, solar panel configurations, and off-grid power systems.
Everything you need to know about DC-DC chargers for camper and boat electrical systems. Why they replaced split-charge relays, how to size them, and installation best practices.
We launched The Busbar, a weekly newsletter covering inverters, BMS firmware, battery cells, and product releases in the DC-power world. Here is what it is, who it is for, and how it fits alongside VoltPlan.
As an early adopter, you're not just a user — you're helping us build something amazing. Every suggestion, every piece of feedback makes VoltPlan better for everyone.
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