BlueWire

v0.500 — Marine Electrical Planner
⚠️ BlueWire is a planning aid only. Wire sizes, protection ratings and routing are provisional estimates. Always verify your design with a qualified marine/electrical engineer. Local regulations vary — ABYC E-11 guidelines apply for mobile installations. Use at your own risk. We accept no liability.
Drag components onto the canvas or load a Scenario.
Overview

🚢 Start your design

Drag components from the left panel onto the canvas, or click Scenarios to load a starter template.

Click any port directly to start drawing a wire — no need to activate a wire mode first.

P positive · N negative · S select · Esc cancel · Ctrl+scroll to zoom

P pos  ·  N neg  ·  S select  ·  F flip  ·  Esc cancel  ·  Del delete  ·  Ctrl+D duplicate  ·  Ctrl+A select all  ·  Left-drag: select  ·  Right-drag: pan  ·  Ctrl+scroll zoom

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Assembling BOM…

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📋 Load a starter scenario

Loads a pre-wired starting point. Current design will be replaced.

🔗 New busbar

🔋 Add battery

🔄 DC-DC Charger type

Choose the isolation type. This affects negative wire routing and wire sizing.

🔒 Isolated (galvanic)

Separate positive AND negative on both sides. Common for cross-voltage charging and galvanic isolation.

🔗 Non-isolated

Shared negative between input and output. Simpler wiring, same voltage bank-to-bank.

🎨 ABYC / ISO wire color guide

Red — DC positive
Black — DC negative
Yellow — DC neg (alt)
Green — bonding / earth
Brown — AC live / hot
Blue — AC neutral
Green — AC earth / PE
Purple — ignition / accessories
Pink — fuel sender
Grey — nav lights / tacho
Use marine-grade tinned copper throughout. Label terminations at both ends.

🔄 Battery switch topologies

How each switch type wires up. The currently-selected type is highlighted.

⚙ Pick your brands

We'll walk you through one category at a time, suggest brands that fit, and auto-match your placed components to real products in the catalog. You can change or skip any step.

💡 Battery charging guide

Charger sizing is based on the total battery bank capacity (Ah) and the chemistry's max safe charge rate (C-rate). The charger's current is shared across all batteries wired in parallel — a bigger bank can absorb a bigger charger.

Max safe charge rate by chemistry

Chemistry Max C-rate Recommended Per 100Ah bank
LiFePO40.5C0.25C (gentler — longer life)max 50A · rec 25A
AGM / Gel0.3C0.2–0.3C30A
Flooded lead-acid0.25C0.1–0.2C25A

Worked examples

Bulk-phase formula: time (h) ≈ Ah_to_refill ÷ chargerA

Notes
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☀️ Expand to solar array

Uses this panel's existing specs. Total panels = series × parallel strings.

☀️ Generate solar array?

You dropped a solar panel. Pick a preset and array shape; check which protections to include. Each panel becomes its own canvas node.

🔋 Create Battery Bank

Quick-add a parallel battery bank from this battery's specs.

⚠ Acknowledge warning

Acknowledging means you have reviewed this issue and accept the risk. Please verify all warnings and errors before building your electrical system. Incorrect wiring can cause fire or injury.

⚡ Positive wire — add protection?

This positive wire should be fused close to the power source.

📦 Add device to DIN slot

All devices are 2-pole (L+N). RCD must be in slot 1 to protect all circuits.

🔒 RCD

Earth leakage protection (30mA). Place in slot 1. L+N pass-through — no circuit output.

⚡ MCB

Overload + short-circuit. L+N circuit output on bottom. Needs RCD upstream.

🔒 RCBO

Combined MCB + RCD. Standalone protection per circuit. L+N output on bottom.

✕ Clear

Remove device from this slot.