Heavy Duty Battery Box

Our heavy duty battery box allows you to turn a regular deep-cycle battery into a convenient portable power station, or create a dual-battery setup using the optional VSR. It is suitable for all deep-cycle batteries up to 330mm (l) x 180mm (w) x 240mm (h) in size.

Black Heavy Duty Battery Box with digital display, multiple power outlets, and sturdy handles for portable energy use, ideal for camping and 4x4 adventures.
Close-up of USB and dual 12V power ports with protective covers on a Heavy Duty Battery Box, part of innovative 4x4 camping power and LED lighting solutions for outdoor adventures.
Heavy Duty Battery Box open to reveal connected deep cycle battery with red and black cables, suitable for lithium batteries and portable power distribution in camping and 4x4 adventures.
Inside view of a Heavy Duty Battery Box showing internal wiring, fuse holders, and connection terminals designed for secure power distribution in camping and 4x4 outdoor setups.
Heavy duty battery box
Heavy duty battery box

Heavy Duty Battery Box

HKPBATTBOXB

Regular price$199.00
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Tax included. Shipping calculated at checkout.
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  • x Backordered, shipping soon

2 Year Replacement Warranty

Black Heavy Duty Battery Box with digital display, multiple power outlets, and sturdy handles for portable energy use, ideal for camping and 4x4 adventures.

Heavy Duty Battery Box

$199.00

Logo with 'Quick-Charge USB-A & USB-C Output' text and symbols on a black background
Digital display with a black border on a white background
Multiple port types allows you to connect a range of devices

Constructed of durable ABS plastic and meeting the UL 94V-0 standard for flammability of plastic products, this battery box is a high-quality unit that will last for many years. It contains two 12v outlets with 10A fuses, a dual USB (1x USB-C + 1x USB-A) outlet, four 50A Anderson-style outlets that can be used as outputs or inputs, and a 175A Anderson-style outlet which can be used as a jump-starter. Unlike most other models on the market, all Anderson-style ports are recessed into the body to minimise the possibility of damage, and the internal cabling uses heavy-gauge wire and quality connectors.

Create your own portable power station.

Our heavy duty battery box allows you to turn a regular deep-cycle battery into a convenient portable power station, or create a simple dual battery setup using either a DC-DC charger or our optional 50A Voltage-Sensitive Relay (VSR) and Dual Battery Wiring Kit. It is suitable for a range of battery types including AGM, Lithium, Wet, Gel and Calcium, and can handle batteries up to 330mm (l) x 180mm (w) x 240mm (h) in size.

The battery can be charged from a range of sources (including regulated solar panels) by simply plugging into one of the 50A Anderson-style ports. The battery’s charge status and voltage can be easily seen via the large digital display.

 Key features

  • Constructed from UL 94V-0 compliant fire-resistant ABS plastic
  • Multiple port types allows you to connect a range of devices
  • Easily connect a DC/DC charger or solar panel with regulator to charge the battery, or use the optional 50A Voltage-Sensitive Relay (VSR) and Dual Battery Wiring Kit to charge directly from crank battery
  • Can be used to jump start vehicles using our optional 175A Anderson jumper cable set
  • Can be used to run up to a 1500W Inverter using our optional Inverter cable kit
  • All ports are recessed into the body to reduce likelihood of damage
  • Easily see battery status with large digital display

Easy dual battery setup

Using a battery box combined with a VSR is the easiest way to create a dual battery setup in your vehicle.

The VSR acts as an isolator, allowing the auxiliary battery (inside the box) to charge directly from the crank battery while the car is running. When the ignition is switched off and battery voltage drops below 12.7V, the VSR automatically cuts the link between the auxiliary and crank batteries.

Materials ABS plastic (UL 94V-0 compliant)
Box dimensions 455mm (l) x 240mm (w) x 330mm (h)
Max. battery dimensions 330(L) x 180(W) x 240(H) mm Note: batteries longer than 324mm will sit at a slight angle inside the box. This will not affect performance.
Max. battery weight 35.0kg
Suitable battery types Any deep cycle (Lithium, AGM, Calcium, Wet, Gel)
Charge method via Anderson plug input or optional VSR
Ports 1 x dual USB output (1x USB-C + 1x USB-A) 2 x cigarette plug outputs 4 x 50A Anderson plug inputs/outputs 1 x 175A Anderson plug output
Cable gauge 3AWG (25mm2) to battery and 175A Anderson port 10AWG (6mm2) to 50A Anderson ports 14AWG (2.5mm2) to cig & USB ports
Ratings 200A isolator switch, 2x 50A auto-reset breakers (Anderson plugs), 1x 30A blade fuse (USB and Cig ports)
Operating temperature -10°C to 50°C
Weight 3.2kg
1x Heavy duty battery box
1x set bolts, brackets & Allen keys
1x Strap

*Our USB-C-equipped battery boxes are still on rollout. Our white battery boxes and boxes purchased from stockists may not have the USB-Cs installed if part of our older batches

  • 5 stars: 27 (82%)
  • 4 stars: 4 (12%)
  • 3 stars: 2 (6%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
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Alex A.
Installed in my camper trailer

Simple to install, well built, great option for DIY setups. Love it

S
Sam T.
Quality kit

Second battery box I have had from HardKorr and just as happy with this as I was first time around. Nothing wrong with first one, just needed a second one.

K
Ken S.
Highly Recommended: Great Build and Price Box with Added Features for Optimal Air Flow and Bug Pr...

Great box , much better than the cheap flimsy stuff , lve added a 20a dc dc mounted on top ( for air flow ) drilled 4 x 25mm vent holes high on the sides , with steel mesh to stop bugs entering

Running a 100ah lithium in it , found the volts readout is not accurate its around .5v out , rendering useless , but l have a direct link to the battery via its own monitor so it doesn’t matter , just something l noticed



Highly recommend this box , great build and price

J
Jono
Hard Korr 12V Set Up: Impressive Quality and Easy Installation for Smart Alternators

My current set up is my first 12V set up and I'm extremely glad I went with Hard Korr.
I deliberated for a long time as to whether I go with other brands and once I saw the construction of the other boxes, which my fellow campers use (namely Adventure Kings), I was glad I went with this one.
The fittings are well organised and the wiring inside is very neat. One of the workers at a Jaycar store actually commented on how impressed they were with the finish quality under the lid.
I use this with the VSR kit which was super easy to install. I have a 2011 NT Pajero and the VSR kit works perfectly with the "smart alternator".
Some people have raised a very good point with the isolation switch sticking out so it could be prone to breaking off.
I have mounted mine easily out of the way of potential damage so it's not an issue for me but I can see the concern.

K
Katie S.
Disappointed with Incorrect Shipment: Ordered Black Hard Korr Battery Box, Received White - Ruine...

Ordered Hard Korr Battery box, shipment arrived promptly in W.A, unfortunately we ordered a black box and received a white one. Disappointed as this was a Christmas gift for our son and we specifically ordered that colour.

R
Rachael
Exceptionally Crafted and Adored: A Testament to Quality

very well made, love it

R
Ricardo
Hardkorr: The Ultimate Power Solution for Unpowered Sites - Lights, Fridge, Shower, and Phone Cha...

Awesome product very highly recommended. Went to Moreton unpowered site and box did the job from running 80lt fridge, lights, shower and charging phones. Thank you Hardkorr.

J
Jake V.
Enhanced Australia's Best Battery Box with Redarc BCDC1225d - Unbeatable Power and Versatility!

Definitely Australia's best battery box! I went even further and added a Redarc BCDC1225d to mine along with a few extra fuses. Made the best even better! Coupled with the 200w portable solar panels and a 140AH battery am now ready for anything ? very highly recommended this product

P
PETER M.
Great Product, But Disappointing Digital Display: My Neglected Complaint

I really like the product, however the digital display has already failed on me. I discarded the original packaging straight away & between being to busy & to lazy to send it back i have not bothered to do anything about it

J
Jeremy G.
Unbeatable Battery Box: Superior Sturdiness, Enhanced Build Quality, Versatile Ports, Neat Wiring...

Absolute awesome battery box. Whilst it is abit larger than a lot of other’s on the market. It makes up for it’s sturdyness, build quality, larger option of ports/plug ins, good quality and tidy wiring.
Would definitely recommend again and again.

C
Chris B.
Upgrade to a Durable and Reliable Box: The Perfect Solution for All Your Electrical Needs

I've had enough of those cheaper black plastic boxes. Flimsy and end up splitting - rubbish and not much cheaper than this box when you add all the Anderson plugs, circuit breakers etc. This box is fantastic and well worth the price. Can't recommend highly enough!!

E
Edgar M.
Exceptional Value: Highly Satisfied with the Box and Hard Korr Lifepo4 Battery Performance

Very happy with the box

Very well priced , the sale price,for what it offers.

So far no complaints as it has performed well with the Hard Korr lifepo4 battery.

I would buy another one if i needed too.

R
Richard
Greatbox: Recessed Switch, Accurate Volt Gauge, Perfect for a Beach Trip with 4x4 Wagon and Solar...

Greatbox, as some have said the switch needs to be recessed, i juat made sure it couldnt be knocked or damged, i found the volt gauge to be 0.5v higher then the multimeter showed, bought for a wk long trip on the beach, i connected it to the battery under my bonnet and had it sitting in the back of my 4x4 wagon, used there 200w solar blanket n kept both batterys charged, very happy with it, would deff recomend

S
Simon G.
Rave Review: High-Quality AGM Battery Box with Accurate Volt Meter & Redarc BCDC1220D Integration

Great box, agree that the volt meter is a bit optimistic, but it's like any gauge - 10%. I have a 120 amp AGM in mine it's a very tight fit but it fits. I've added a Redarc BCDC1220D to it. Great value, really well made and quality components inside. Highly recommend this box.

G
Gregory N.
The Box is Great, but the Mounting Strap Falls Short

The strap that comes with it for mounting are too short otherwise the box are all good

P
Paul O.
Top-notch Box Construction with Recessed Anderson Plugs and Clear Digital Display: Fast and Hassl...

solid box construction, recessed anderson plugs, clear digital display and well connected internal wiring. i did a fair bit of research on these boxes and this is the best ive come across. ive connected my dc dc charger under the lid so everything is concealed now. service and delivery were fast and pain free

R
Rex
Great Value Battery Box with Short Cables: A Review of the 105 Series Landcruiser Reticulation Ch...

Battery box is excellent value for money. Two issues I found; the supplied cables were not long enough to reticulate from the battery box in the rear of a 105 series landcruiser to a battery under the bonnet through the chassis rail, about 20-30cm short. Secondly, the supplied cable for the VSR attachment was not long enough inside the lid, this seems like a manufacturing issue as I had to remount the connection terminals.

B
Boner
The Perfect Match: The White Model - Ideal for Your Camper Interior with Abundance of Plugs for U...

The White model fits in well with my camper interior finish , Lots of plugs to run just about everything you need while camping

H
Huub B.
Hardkorr: Top-Quality, Impressive Battery Box with Excellent Connectivity and Build

Excellent product plenty of connections quality build got 1 battery box first was so impressed that i bought a second one thanks Hardkorr for a top quality product

D
Darren c.
HardKorr's Superior VSR: Effortlessly Powering My Fridge, Fuel Cell, Phone Charger, and Tool Char...

Very happy with my purchase,I run my fridge ,fuel cell,phone charger and tool charger all at once and the VSR works awesome recharging deep cycle battery whilst driving to next job, what a breeze.Thank you HardKorr, superior product.

M
Matt D.
Versatile Battery Box with Excellent Construction and Outlet Selection, Ideal for Jump Starting V...

Battery box is great, well constructed and with good selection of outlets. Yet to test the jump start function, but guess it's sucess will be based on the type of battery in the box ! The mini VSR won't suit my car alternator type !

B
Brice
The Ultimate Battery Box: Sturdy, Efficient, and Compatible with VSR and DCDC Charger for Seamles...

Best battery box I have ever owned. Nice and sturdy. Fits and handles my 120ah agm with ease. The vsr in it is a bonus. Works as a plug and play system with my dcdc charger perfectly. If you are looking for a battery box look no further and buy this one. You won’t regret it!

S
Steve
Brilliant and Cool Plug and Play Battery Box - Easy Setup and Highly Recommended!

Great battery box! easy to set up and use - looks cool and the "plug and play" nature of it is brilliant.

Highly recommend!

A
Andrew D.
The Excellent Box: Charge All Your Gadgets On the Go, with a Few Improvements Needed

The box is excellent makes charging ALL THE GADGETS WE NOW TAKE AWAY WITH US. BEING ABLE TO TAKE OUR FRIDGE NOW IS GREAT. TWO IMROVEMents I CAN THINK OFF, THE RED SWITCH STICKS OUT A LOT it's ONLY A MATTER OF TIME BEFORE I BREAK IT. ALSO, I DIDNT BUY A LITHIUM BATTERY SO ITS SUPER HEAVY. THE CARRY STRAPS COULD BE THICKER. Apart from that, the unit is strong. The strap going around the outside is reassuring.

P
Phill O.
Effortless Installation and Reliable Performance: A Month with the Battery Box, Perfect for Novic...

I've had the battery box installed for a month now and couldn't be happier with it. Easy to install and use, even for someone with zero 12v experience. Solid construction and fits a large (130ah) battery. Would advise you check your battery dimensions first though, I didn't but got lucky... just.

M
Michael W.
Versatile and Durable Battery Box with USB and Cigarette Sockets - Perfect for Off-Grid Applications

Seems to be a very sturdy, well put together battery box. Having 2 x usb and 2 x cigarette sockets means this should be great for most off grid scenarios.

Highly recommended.

J
Justin R.
Ultimate Battery Box: Versatile, Heavy-Duty, and Leak-Proof - The Perfect Power Solution!

Awesome battery box, does everything you could want from cigarette lighter ports to usb charging. Also has Anderson plug outlet/inlets and an option for jump starting. Heavy duty construction which I love cos I've had batterys leak under the bonnet and peel paint, won't happen again. Highly recommended this battery box it won't dissapoint.

A
Alan
Highly Recommended Battery Box: Quality Construction, Flexible Connectivity, and Excellent Value ...

Very happy with this battery box. Solid construction, plenty of connections for my purpose and looks to be quality wiring and fittings. I have installed a lithium battery and a DC-DC charger in the box for a completely portable, plug in dual battery setup in my car and it is excellent. Would highly recommend this battery box over the cheapies for quality, rugged construction and flexible connectivity. Good value

J
Jen
Review: A Satisfactory First Encounter with a Battery Box, Despite Optimistic Charge Gauge

I've had this box for a couple of months now and whilst the charge gauge is, as others have commented, woefully optimistic, it does the job. My only other 'whinge' is I couldn't fit the VSR under the wires so God bless gaffer tape.

This was my first experience with a battery box and I'm happy with it.

M
Matt
Efficient 120ah Lithium Battery Box with VSR for Reliable Charging and Convenient Switch Control

I'm very happy with this battery box. I've got a 120ah lithium in it connected to my alternator for charging using the built in VSR. It works just as it's should. It cuts in very shortly after I start my ute and cuts out at 12.7v. You do have to make sure that the battery box switch is in the on position for it to charge which isn't a problem as long as you are aware of it. As the display lights up from your car battery even in the off position it is NOT charging your second battery unless the switch is on. I didn't pick up on this until the second day ( not too smart ). I use the 175amp Anderson plug output for my 1500watt inverter which works great. I have already shown a couple of friends who will now be getting them as well.

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