If you’re looking to get a dual battery system in your vehicle or you’re towing a caravan or camper trailer, chances are you have probably heard all about Anderson plugs. Put simply, an Anderson plug is a specialised plug we use to connect devices that use high-current circuits.

Sizes & Colours

Anderson plugs come in a range of sizes and colours, the most common being the grey and the red 50-amp ones. You can get up to a 350-amp. The bigger the current, the bigger the Anderson plug we need.

A red Anderson plug will only fit into a red Anderson plug. We can’t connect, basically, a red and a grey. The only real reason you’ll have the different colours is so that you always remember to connect the right accessory into the right accessory on your caravan circuit or car.

When to Use an Anderson Plug

Charging Circuits

The Anderson plug is designed to handle a high, continuous load, so this makes it ideal to use in charging circuits. The most common use that we install Anderson plugs for is charging the auxiliary battery in your caravan or camper trailer when driving.

It’s fitted to the rear of the vehicle like this one here. This is the ideal alternative to running a charge feed through your 12-pin plug. Too much current charging through a 12-pin plug can cause the pins to melt as they’re not large enough to handle the current from most modern alternators. Having an Anderson plugs means you can safely pass more charge through to your caravan’s battery charge system, keeping the caravan batteries charged up while you travel to your next destination.

Solar Panel Connection

Another common use for Anderson plugs is to connect a solar panel via a regulator to top up your batteries. We often fit these to four-wheel drives and caravans with dual battery systems in an easy to access location so they could easily top up their auxiliary batteries via the solar panel without having to run your vehicle.

Powering ESC (Electronic Stability Control)

We’ll also regularly fit another Anderson plug to your tow bar if you’ve got a caravan that requires power to ESC, which is electronic stability control. Although your ESC can be run through a 12-pin if necessary, we recommend using an Anderson plug because it’s a more secure connection when driving, and ease of disconnection if you’re going off-road. It’s common practice to use a red Anderson plug for ESC and a grey one for your charge feed on the back of your car so you can easily identify them.

12 Volt Accessory Power Alternative

Due to their secure locking design, Anderson plugs also make great alternatives for powering high-draw 12-volt accessories such as fridges and air compressors. Anderson plugs are much more robust and hold a more secure connection than the standard 12-volt cigarette socket. They’re particularly good for those of us who like to venture off the beaten track.

I hope this video has given you a bit more information about what Anderson plugs are and why we recommend installing them as part of a dual battery system in your four-wheel drive, caravan, or camper trailer.

If you have any further questions about Anderson plugs, give us a call on 1300 227 353, contact us online or comment below.