Designed specifically for the Hard Korr Heavy Duty Battery Box, the Voltage-Sensitive Relay Kit from Hard Korr is perfect for creating a dual battery setup in your vehicle.
Manufactured using the highest quality materials, the inbuilt VSR acts as an isolator to allow the auxiliary battery to charge from the crank battery while your car is running.There’s no risk of draining your car battery either with the fully automatic operation cutting the link between the two batteries as soon as the ignition is switched off and the battery voltage drops below 12.7 volts.
Fitting neatly inside the Hard Korr battery box and with inbuilt surge protection, the Voltage-Sensitive Relay Kit from Hardkorr allows for a simple setup when you’re relying on battery power.
I have limited space in the engine bay and would like to install the VSR vertically or on it's side.
Richard - 2372(3 years ago)
G'day Richard,
I'm assuming you're planning to install the Battery Box on its side? You've asked the question on the VSR unit that mounts into the lid of the box. Hard Korr doesn't explicitly state that it must be used upright, however we'd recommend proceeding with caution if trying to mount the battery box on its side. They've been designed to use in the standard orientation, so if you were to install it vertically you might run into trouble with the case, as it could become damaged or warped over time. You'd also need to ensure the battery you put in the box can be used in another orientation.
Leece - Snowys(3 years ago)
Do I need to connect to a particular anderson plug?1 answer
There is no mention in the instructions which anderson plug the crank battery should be connected to? I assume it is the one which is connected to the mini vsr or would any work?
Paul - Fulham (3 years ago)
G'day Paul,
Yes, you'll need to connect the dual battery wiring kit Anderson plug (from the crank battery) to the plug you've fitted the VSR unit to.
Leece - Snowys(3 years ago)
Will this work on all vehicles?1 answer
I have a dual battery setup under my bonnet, just purchased the battery box and cables to run a third battery from engine bay to the rear of the vehicle. Is this mini VSR still going to work? Or do I need a dcdc unit.
Thomas - Wirrina Cove (3 years ago)
G'day Thomas,
As far as we know you should still be able to use a dual battery wiring kit and mini VSR to run the battery box as a third battery. I can't think of a reason that your current dual battery setup would interfere with the third battery, however it might be worth chatting through with the auto-electrician who wired up your second battery.
Leece - Snowys(3 years ago)
Does this work with Smart Alternators?1 answer
I Have Pajero Sport 2016 and want to install dual battery system, is VSR suitable or do I need a DCDC charger?
Alistair - Camira(3 years ago)
G'day Alistair,
Variable voltage alternators tend not to work effectively with the VSR units, so Hard Korr suggest using a DCDC charger instead.
Leece - Snowys(3 years ago)
Car connection1 answer
Do I need one of these if I just connect my 12v car accessories plug into the battery box If I change to a Anderson plug fitting, to just charge while driving, when car turned off, won’t car battery isolate, so no draw, as no 12v stuff works when car off?
Wade - Darwin (3 years ago)
Hi Wade,
Sorry, I'm a little confused by your question, so I'll do my best. The VSR isolates the battery box battery from the main vehicle battery so that there is no risk of flattening your crank battery. This will isolate one of the Anderson Ports for charging from your main battery. This unit cannot be charged from the internal 12V cig plug in your vehicle, it will need to be changed from your main battery using a Dual Battery Wiring Kit.
