KickAss 12V Smart Battery Guard (VSR & LVD in One)

KickAss 12V Smart Battery Guard (VSR & LVD in One)

Support Page Battery Guard Manual

KickAss 12V Battery Guard

The KickAss Battery Guard can disconnect any non-essential loads from the battery (Low Voltage Disconnect). Or it can be set as a Voltage Sensitive Relay (VSR) and connect the main battery to the auxiliary battery. Fully customisable Bluetooth app, manual override switch, LED diagnostics mode.

Set As Low Voltage Disconnect or Voltage Sensitive Relay

Have the flexibility to set the battery guard to suit your needs. Set the Battery Guard as a Low Voltage Disconnect (LVD) or a Voltage Sensitive Relay (VSR). If upgrading your vehicle and no longer need a VSR, simply change the functionality via the app.

Battery Guard – Low Voltage Disconnect

Protect your battery from accidental over-discharge. Simply install the device onto your auxiliary battery, set the voltage, and once it reaches the threshold it will disconnect all loads—preventing battery damage.

Battery Guard – Voltage Sensitive Relay

Allows both your main and auxiliary batteries to charge at the same time from your alternator. Ideal for vehicles without smart alternators.

Fully Customisable Settings Within Bluetooth App

Control and configure all battery guard preferences via the Bluetooth app. Easily set the unit to operate as a VSR or LVD.

Set Cut-In/Out Voltages & Timeout

Manual override via app—great for emergencies. Set the delay before the guard disconnects below cut-out voltage. Ideal for high-load applications like inverters, where voltage may momentarily dip.

Manual Override Switch

Get full manual control via a dashboard-mounted override switch. Perfect for jump-starting your main battery from your auxiliary battery.

Please check your battery specifications before attempting to jump-start.

LED Diagnostics

Get status updates via LED pulses:

• 1 short green pulse every 4 seconds – Battery voltage is above cut-in; Battery Guard is engaged
• 1 short blue pulse every 4 seconds – Voltage is below cut-out; waiting for timeout before disconnect
• 1 short red pulse every 4 seconds – Voltage is below cut-out; Battery Guard is disengaged

100A Continuous Max Discharge

Supports up to 100A continuous discharge (300A peak). Suitable for all common 12V setups. Maximum inverter size: 1200W.

Easy Installation

Mounts directly to the battery terminal—no extra cabling or mounting hardware required.

Safe for High Temperature Use

Thoroughly tested for high-temperature environments.

Note: If used in a KickAss Battery Box as an LVD, the override switch must be used to resume charging after disconnect.

The KickAss Smart Battery Guard automatically isolates the starter battery from the auxiliary battery when no charge is detected, with default VSR cut-in at 13.2V and cut-out at 12.25V. It also protects the auxiliary battery from over-discharge with configurable LVD settings via Bluetooth.
This dual protection ensures your starter battery won’t be drained by auxiliary loads, while your auxiliary battery is safeguarded from deep discharge, extending battery life and reliability on all your adventures.

Yes, the KickAss Smart Battery Guard features Bluetooth 4.2 connectivity and is fully programmable via an iOS or Android app. You can view live battery voltage and control the relay status ON/OFF directly from the app.
This lets you easily customise voltage cut-in/out levels, check battery health in real-time, and manually override settings remotely, giving you full control and peace of mind from your phone.

Installation involves fitting the device’s positive clamp to the vehicle battery post and connecting the negative terminal wire to the battery negative. The package includes all necessary hardware, including an M8 bolt and washer, and a 2.8m remote override switch cable for easy dash mounting.
The straightforward clamp-on design means you can install it yourself or with an auto-electrician’s help, ensuring a secure fit and quick setup to protect your batteries without hassle.

The device has programmable voltage sensing relay (VSR) and low voltage disconnect (LVD) functions with recommended cut-out voltages (e.g., 12.6V for VSR and 11V for LVD) to prevent over-discharge. It also has a manual override and remote switch for safe user control.
These features protect both starter and auxiliary batteries from damage due to over-discharge or improper jump-starting, while allowing you to safely override settings when needed.

No, the KickAss Smart Battery Guard is not IP rated and is not suitable for areas where water ingress is possible.
However, its compact 0.34kg unit and robust design make it ideal for secure installation inside engine bays or protected compartments, ensuring reliable operation in typical vehicle environments.

The device operates on 8-18V DC systems (12V battery systems only), with a minimum standby current of 1mA, maximum continuous current of 100A, and cranking current capacity of 250-300A for less than 10 seconds.
These specs mean it can handle typical vehicle starting loads and continuous auxiliary loads efficiently, providing dependable battery management without draining your system.

The remote override switch connects via a quick plug with a 2.8m cable, allowing you to manually control the relay status from inside the vehicle cabin. It overrides automatic cut-in and cut-out settings to reconnect or disconnect batteries as needed.
This feature is perfect for jump-starting from the auxiliary battery or managing power flow conveniently without accessing the battery bay, enhancing safety and ease of use.

Yes, all voltage cut-in and cut-out settings for both VSR and LVD functions are fully configurable through the Bluetooth application, with recommended settings provided for AGM, GEL, WET, and CAL batteries.
This flexibility allows you to tailor battery protection to your specific battery chemistry and usage, maximising battery performance and lifespan on your off-grid adventures.