VEVOR 12V 140A Split Charge Relay Kit vs REDARC SBI12 Battery Isolator

The REDARC SBI12 is the better-engineered unit: a microprocessor-controlled isolator with fault detection and LED status, proven in Australian off-road and marine use. The VEVOR kit carries more current (140A continuous, 160A intermittent) and ships as a complete kit with 6 m of cable and mounting hardware, which suits DIY installers wiring a second battery from scratch. Reviewers of the REDARC praise reliability and low standby draw; VEVOR owners report it works but note the plastic housing and generic instructions. Buy the REDARC for a long-term build; buy the VEVOR if you want everything in one box and a higher current ceiling.

• Choose the VEVOR split charge relay kit if you are wiring a dual-battery setup yourself and want the cable, terminals and relay in one package with headroom above 100A.
• Choose the REDARC SBI12 if you want a compact, microprocessor-controlled isolator with fault indication and a long track record in off-road and marine installs.