Heavy Duty Dual Battery Isolator Kit 300 Amp With 1000 Amp Peak Voltage Sensitive Relay VSR For 12 Volt Systems Works With All Battery Types Including Lithium LiFePO4 Inverter Rig And Accessory Power

Heavy-Duty 300A Dual Battery Isolator Kit with VSR for 12V
✔️ 300A peak, 13.3V in, 12.8V out, IP65 sealed, includes full kit

This compact, high-capacity dual battery isolator is designed to keep your main starting battery charged while feeding power to auxiliary systems. It’s ideal for off-road rigs, campers, and 12V setups where reliable separation between batteries is critical.

✅ 300A continuous output with 1000A peak for heavy-duty systems
✅ VSR engages at 13.3V and disconnects at 12.8V to protect the start battery
✅ IP65 sealed enclosure for dusty, wet, off-road environments
✅ Compatible with all battery types, including LiFePO4 lithium packs
✅ Includes full kit: isolator, 20 ft (6 m) red power cable, 2 ft (61 cm) black ground cable, terminals, lugs, heat shrink, insulated ring terminal, and 6x 8 in zip ties
✅ Compact, under-hood friendly size for easy install

💡 What is a heavy-duty dual battery isolator used for in a 12V electrical system?

It's a handy way to keep the starting battery charged while powering auxiliary loads. It helps split power safely and efficiently between batteries so heavy accessories won’t drain the main starter battery.

- Handy for keeping the starting battery charged when you run inverters or accessories
- Helps prevent deep discharge of the primary battery by isolating auxiliary batteries
- Works with LiFePO4 and other chemistries for flexible power setups
- Great for off-road, camping, boats, and work trucks that rely on a stable power split
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