Dual Charging System
Perfect for vehicles with both solar panels and alternator charging. Charge while driving AND when parked.
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Open in editorThe dual charging system combines solar and alternator charging for maximum energy harvest. A 200W solar panel feeds through an MPPT controller, while the vehicle's alternator connects through a DC-DC charger. Both charge a 200Ah lithium house battery, which distributes power through a bus bar to lights and a fridge.
The DC-DC charger is essential — it isolates the house battery from the starter battery, prevents voltage drops, and provides a proper charging profile for lithium batteries. The bus bar serves as a central distribution point for the positive connections, keeping the wiring clean and organized. This is the most popular setup for serious van builds and overlanding rigs.
Components
| Component | Qty | Key Spec |
|---|---|---|
| 200W Solar Panel | 1 | 200W |
| MPPT Charge Controller | 1 | 30A |
| Engine Alternator | 1 | 120A |
| DC-DC Charger | 1 | 30A |
| 200Ah Lithium Battery | 1 | 200Ah |
| Positive Bus Bar | 1 | 250A |
| Lights | 1 | 5A |
| Fridge | 1 | 8A |
