Hey, I'm Christoph, the person behind FusePlan. I built it because planning a home sub-distribution board on paper or in a spreadsheet means guessing whether a row of breakers actually fits, and I wanted an answer before buying anything. FusePlan drags real DIN-rail hardware (Hager, ABB, Schneider) onto a rail at its actual width, so if it fits on screen it fits in the enclosure. From there it builds a parts list, an auto-generated wiring schematic, and printable label strips for the panel door. It's free, runs entirely in the browser, and doesn't ask for an account or track anything. The only way it makes money is Amazon affiliate links on the parts list, so there's no premium tier waiting behind a paywall. It's still early beta. Some things, like buying the parts list directly, are still being built, and I'd rather ship it and hear what's missing than keep it private until it's "done." If you plan or wire panels yourself, or you're just curious how a browser tool handles DIN-rail math, I'd love to hear what you think. Happy to answer anything in the comments.

FusePlan

A free browser tool for planning electrical sub-distribution

A free browser tool for planning electrical sub-distribution