A dual battery system gives your 4WD the freedom to power fridges, lights and tools without draining your start battery. Here’s how it works:
- One battery cranks your engine (starter battery)
- The second battery powers your accessories (deep cycle)
- A DC-DC charger or isolator manages flow between the two
- AGM Deep Cycle: Good balance of cost, durability and performance
- Lithium: Lightweight, long life, fast charge, but needs proper BMS
- Flooded: Works well if accessible for regular checks
A dual setup is essential for extended off-grid touring.
RedPoint helps design systems that suit your budget and gear – no guesswork.
