Sailboat House Battery System
A complete marine electrical system with shore power inlet, inverter-charger, parallel battery bank, and distribution to critical boat systems.
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Open in editorThis marine electrical system provides reliable power at the dock and at anchor. A 30A shore power inlet connects to an inverter-charger that charges two 200Ah lithium batteries wired in parallel for 400Ah total capacity. The inverter-charger serves double duty — charging from shore power when docked and providing AC output from batteries when at anchor.
The dual battery bank feeds through a 200A main fuse to a DC fuse panel distributing power to three critical circuits: navigation lights, bilge pump, and cabin lights. The bilge pump circuit is particularly important — it's a safety-critical system that must always have power. This setup is standard for cruising sailboats in the 30-45 foot range.
Components
| Component | Qty | Key Spec |
|---|---|---|
| 30A Shore Power Inlet | 1 | 30A |
| 2000W Inverter-Charger | 1 | 2000W / 60A |
| 200Ah Lithium Battery | 2 | 200Ah each |
| 150A Main Fuse | 1 | 150A |
| DC Fuse Panel | 1 | 3 circuits |
| Navigation Lights | 1 | 3A |
| Bilge Pump | 1 | 8A |
| Cabin Lights | 1 | 5A |
