Automatic dual-battery protection for 24V rigs that never touches your starting battery.
The REDARC Smart Start SBI (rdcSBI224) is a voltage-sensing battery isolator built for 24V vehicle and equipment systems. It watches your main battery and only bridges to the auxiliary bank once the primary is charged, then disconnects the moment voltage drops. That keeps your cranking battery intact while an alternator or charger tops up a second battery for winches, fridges, or work lighting. This is the 24V variant, so it suits the minority of trucks and machinery running 24V rather than the more common 12V setups.
- Voltage-sensitive relay connects and isolates automatically, no manual switch or driver input needed
- 200A continuous rating handles heavy auxiliary loads and high-output charging
- Sealed, compact housing for underhood or in-cab mounting near the batteries
Note: this is a passive isolator, not a DC-DC charger. If your auxiliary bank needs a specific charge profile, pair it with a unit from our DC-DC chargers. Browse related gear in dual battery systems.
| Specification | Detail |
|---|---|
| Type | Smart voltage-sensing battery isolator (SBI) |
| System Voltage | 24V |
| Continuous Current | 200A |
| Operation | Automatic connect / disconnect |
| Model | rdcSBI224 |
As an authorized REDARC dealer, it is backed by the full manufacturer warranty.
Presented by Overland Kitted
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