Whether you're planning a van build, cabin, or full home backup system,
map out your system, test ideas, and know exactly what you need.
🖱️
Drag-and-Drop Canvas
Place, move, and connect components on a pan/zoom canvas with smart alignment guides. Click terminals to draw wires, drag bend points to reroute, and add text notes to document your design.
☀️
Real-Time Simulation
Run whole days at adjustable speed. Battery state of charge, PV output, and loads respond to time of day, cloud cover, and temperature, with hot panels producing less and cold mornings more.
🔌
Full AC Side
Grid input with scheduled outages, generators that burn real fuel, hybrid inverter/chargers that switch to battery when the grid drops, breaker panels, sub-panels, and transfer switches.
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Component Database
Pick from 200+ real models of panels, batteries, inverters, charge controllers, generators, and appliances from brands like Renogy, Victron, and EcoFlow. Selecting a model auto-fills all specs.
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Auto AWG Wire Sizing
Every wire is sized to the correct gauge for its current. Wire thickness scales visually with ampacity, from 22 AWG signal wires up to 4/0 AWG battery cables.
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Real Voltage Drop
Wires have actual resistance: long or undersized runs sag under load, loads brown out, and lost watts show up as extra draw at the source. Over-drop and overloaded wires light up with warnings.
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Realistic Protection
Fuses, fuse blocks, and breakers trip on real time-current curves: a small overload takes minutes, a dead short is instant. Reset breakers, replace fuses, and watch trips flash on the canvas.
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Wiring Checks
Reverse polarity, shorts, AC appliances on DC circuits, swapped line and neutral, PV string overvoltage, and mismatched battery banks are all caught and flagged on the offending component.
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Fast-Forward Forecast
Run your design through up to 7 simulated days in seconds. Get battery lows and when they hit, energy by source, generator hours and fuel burned, grid cost, and anything that tripped.
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System Summary Panel
Live totals for PV wattage, battery capacity (Ah & kWh), DC and AC daily load, estimated autonomy in days, and solar sufficiency rating.
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Community Gallery
Share your design to the public gallery, browse and search other people's builds, and open any of them straight in the builder. No account needed, just a name if you want one.
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Save & Export
Save your full design to a portable JSON file and reload it any time, or export the diagram as a PNG or SVG image in dark or printer-friendly light theme. No account, no cloud, no lock-in.
