Start from a ready-made template or drag components onto a blank canvas — each one appears as its own icon with a red (+) and black (−) connection point, just like the real thing. Wire matching terminals together and this tool sizes your battery bank, solar array, wire gauge, and fuses as you build, runs automatic safety checks on your layout, and exports a printable diagram, PNG, and full parts list.
This is a planning aid, not an engineering stamp. Verify wire gauge, fuse sizing, and battery/solar capacity against your actual components and local electrical code, and have the install checked by a qualified 12V/RV electrician if you're unsure. This tool is frequently updated for accuracy, with new components and other improvements added regularly to better guide your electrical planning.
Drag a component onto the canvas — each one lands as its own icon. Click Connect Wire, then click a red (+) or black (−) terminal and a matching terminal on another part to wire them. Drag any label to reposition it, or drag a wire itself to route it around other wires. Scroll to zoom, drag empty space to pan, drag the bottom edge to resize.
Parts & Materials List
Generated live from your diagram above. Quantities, gauges, and hardware counts are estimates for shopping and planning — confirm exact part numbers with your supplier. Print / Save PDF
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