12V wiring diagram tool
Design safe DC electrical systems for your camper van, sailboat, RV, or off-grid cabin. Drag-and-drop editor with real-time safety validation catches fire hazards before they happen.
Battery Bank
Two batteries wired in parallel with solar charging and inverter
Full Off-Grid Cabin Power
Complete off-grid cabin system with dual solar, large battery bank, 2000W inverter, and well pump
Off-Grid Cabin Basic
Simple solar-powered cabin system with lights, fridge, and USB charging
Dual Charging System
Solar and alternator charging with bus bar distribution
RV Basic Electrical
Simple RV electrical system with shore power charging, master disconnect and DC fuse panel
RV Solar Upgrade
Add solar panels and a lithium battery upgrade to your RV
Sailboat House Battery System
Marine house battery bank with shore power charging and DC distribution
Sailboat Solar Refit
Add solar charging to an existing sailboat with basic marine loads
Simple Solar Setup
Basic solar charging system with battery and one load
Small Van Setup
Complete camper van system with solar, multiple loads, and AC inverter
Multi-Panel Solar Array
Three solar panels in parallel with dual battery bank and bus bar distribution
Solar Starter Kit
The simplest possible solar setup with one panel and one load
Full Van Build
Complete van electrical system with solar, alternator charging, battery monitor, and full distribution
Split Charge Relay Setup
Charge a leisure battery from your engine alternator while driving
Design electrical systems with confidence
Drag & drop editor
Build wiring diagrams visually with 18 component types — batteries, solar panels, fuses, inverters, and more.
Real-time safety validation
17 safety rules check for fire hazards, undersized wires, missing fuses, and design flaws as you build.
AI-powered recommendations
Get intelligent suggestions to improve your electrical system design based on best practices.
Built for your community
Whether you're converting a van, refitting a sailboat, or wiring an off-grid cabin, No-Sparks speaks your language.
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