






KickAss Quick Connect Dual Sensing VSR
Pickup available at Acacia Ridge Store
Usually ready in 1 hour
1 Year Warranty
This product is covered by a 1 Year Limited Warranty.
Description
The KICKASS team have done it again! A new design in Voltage Sensitive Relays unlike anything currently on the market!
This product is a unique dual-sensing VSR for charging an auxiliary battery system while ensuring that your vehicles starter battery is isolated when there is no charge from the alternator. Quick connect Anderson-style plugs allow for easy installation, no hard wiring! Side molded mounting points allow flexibility for installation whether it be under the bonnet or anywhere else in your 4WD, caravan or camper. The units are also water resistant and can even be used for marine applications
The dual sensing function intelligently detects the charge of both the auxiliary and cranking batteries and allows for current to flow back in the case where the starting battery is low, or when an external charger is connected to the auxiliary battery such as AC or Solar
The VSR is also fitted with an override switch for those sticky situations when you're cranking battery has been discharged and you need to transfer charge back from your auxiliary battery.
The Basics on How It Works.
When the vehicle's engine is running, the alternator will charge the start Battery. Once the start battery has reached 13.2V the VSR will connect the start and auxiliary batteries, enabling them to charge simultaneously
When the vehicle's engine is not running, the alternator is no longer charging, so the start battery voltage will drop. Once the start battery voltage is below 12.8V, the VSR will disconnect from the auxiliary battery. This means the auxiliary battery can NOT drain the start battery
Key Features:
- >Easy connection via input and output Anderson style plugs
- Charge your auxiliary battery without the risk of discharging Start Battery
- Protect electronics on auxiliary battery circuit from engine start up spikes
- Fully automatic operation
- Override Switch (Engages Relay regardless of sense voltage)
- Indication Light Wire (Active when VSR is engaged)
- Override Wire (Activated by + Positive Ignition Feed)
- Dual Sensing (Senses voltage of start and auxiliary batteries)
Specifications
SPECIFICATIONS |
Current Rating | 140A Max for 5 second, 50A Continuous |
Voltage System | 12V DC |
Dual Sense Cut In Voltage (Connect Voltage) |
13.20V with 15 second delay |
Dual Sense Cut Out Voltage (Disconnect Voltage) |
12.80V with 15 second delay |
LED Operation | On - Battery is Connected Off - Battery is Disconnected |
Operating Temperature | 0°C - 50°C |
Net Weight | 0.35kg |
Housing Dimensions | 110mm x 102mm x 50mm |
Mounting Hole to Mounting Hole Diameter | L - 49mm / W - 95mm |
Warranty | 2 Years |
User Manual and Support
KickAss has warehouses located on both the East and West Coast of Australia. Express orders are dispatched same business day if ordered before 12pm AEST. Standard orders are dispatched within 2-3 business days. Deliveries are made during business hours, Monday to Friday.
At KickAss, we take full control of our product journey - from concept to creation - by designing, engineering, and manufacturing our own batteries and 12V accessories in our wholly owned facilities located in Australia, China, and the USA. This end-to-end approach allows us to maintain strict quality standards, drive innovation, and deliver unbeatable value. By owning our production facilities, we ensure every product that carries the KickAss name is built tough, tested rigorously, and ready for off-grid adventure.
Change your mind? No worries, our quick & easy online or in-store returns process has you covered. Learn more.
See why our customers are all in—these reviews speak for themselves!

Our experts are ready to power you up!
Need a hand installing your KickAss gear? Find approved installers in your local area.