RV Battery Isolator 12V 140A VSR Relay, Automatic Battery Splitter Charger
Keep your 12V power system reliable on every adventure with the RV Battery Isolator 12V 140A VSR Relay. This automatic battery splitter protects your starting battery while ensuring auxiliary loads get charged when the engine is running. It automatically combines two batteries during charging and isolates them when not charging, so you never have to choose between a ready-to-start engine and a fully powered camper, boat, or leisure setup. Built for rugged environments, it’s ideal for camper vans, 4x4s, leisure vehicles, and marine applications. You’ll enjoy minimal voltage drop compared with diode-based isolators, thanks to a design that avoids the common 0.6V loss. The robust glass fiber reinforced nylon enclosure, IP67 protection, and ISO8846 ignition protection make this unit reliable in engine compartments and harsh outdoor conditions. A built-in LED indicates when the VSR engages, and you can choose surface or panel mounting for flexible installation. An optional Storage Mode helps eliminate standby power draw when the engine is off, preserving battery life for extended off-grid use.
Benefits & Tips
- Effortless dual-battery management: let the device automatically connect batteries during charging and isolate them when not charging, keeping the starter battery safe while maximizing auxiliary power.
- Reliable for off-road and marine use: designed for camper vans, boats, and leisure vehicles, with ignition protection and waterproof housing to stand up to engine compartments and wet environments.
- Flexible installation and low idle draw: surface or panel mounting options, M6 terminals, and a low standby power draw (10 mA) make setup clean and efficient. Storage Mode provides zero power consumption when the engine is off.
Product specifications
- Brand Name: NONE
- Model Name: 25100
- Origin: Mainland China
- Special Features: automobile battery Isolation
- Material: Nylon
- Color: Black
- Nominal Voltage: DC 12V
- Combine Voltage: DC 13.3V
- Open Voltage: DC 12.8V
- Continuous Rating: DC 125A
- Intermittent Rating: DC 140A
- Power Consumption: 10mA (Standby) / 330mA (Engage) / 0mA (Storage)
- Terminal Studs: M6(1/4”)
- Waterproof Level: IP67
- Enclosure: Glass Fiber reinforced Nylon
- Meets ISO8846 Ignition Protection
- LED indication: built-in (ON when VSR engages)
- Mounting: Surface or panel mount options
- Storage Mode: Optional
Package includes:
- 1 x Smart Battery Isolator
Warnings / Reminders
- Note: This kit does not include 70A-rated cable. Use appropriately sized wiring for your dual-battery installation to handle up to 140A intermittent/125A continuous.
- Designed for 12V systems and engine compartments; ensure proper installation and ventilation. If unsure, consult a qualified automotive electrician.
- Storage Mode is optional and helps minimize power draw when the engine is off—enable it to maximize off-grid battery life.
All electronic and mechanical equipment, devices and machines sold by InterCyprus to EU countries are CE certified and carry a two year warranty.
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