Dual Battery Systems Sunshine Coast Auto Electrician
Harmac Auto Electrics is a Sunshine Coast Auto Electrician company who maintain a large supply of dual battery systems for use in a wide range of vehicles.
It doesn’t matter whether you drive a car, 4WD, trailer, caravan, or other vehicle, we have a battery system that fits.
Going off-road often means needing more power to run accessories such as a winch, freezer, or even a phone charger. You may also want the peace of mind that comes with having backup power in case your battery decides to die on you in a remote location, where it’s impossible for you to contact anyone to come and help.
In these situations, and many others, it may be a dual battery system that saves the day.
Staying Cool At All Times
The average 4WD traveller usually comes equipped with a fridge, which is the perfect place to store your food and beer. While a cold beer is always a bonus, it’s imperative that your food be kept cool so that it does not spoil.
Rather than keeping your vehicle running overnight to power things, you should put the controls in the hands of a deep-cycle battery. As long as that battery remains charged, you can connect your fridge and keep everything cool inside.
How do they work?
With a dual battery system in place, you can ensure that your deep-cycle battery always remains charged, and all without discharging the starting battery in your vehicle.
The ways in which this can be achieved are numerous, starting with a manual rotary switch to mini-computerised electronic devices. Back before electronic dual battery isolators arrived, it was a solenoid device, which is still commonly used today, that was put into action.
Function of the Isolator
The purpose of the isolator is to ensure that the deep-cycle battery is disconnected from the starting battery when the deep-cycle unit is being used to keep the fridge cool. It must maintain that dosconnection when the engine is started, at least until the starting battery is fully charged. When that is complete the current then flows to charge the deep-cycle battery.
The newest electronic devices are even more advanced, as they are able to monitor both batteries and adjust the rate based on the age and condition of the battery. There are even some isolators that can allow the starting battery and the deep-cycle battery to work together to produce more starting power in the event of a drop in voltage in the starting battery.
That set-up does well when cranking loads are small, but you may be out of luck if you are looking at a dead-flat battery in a large-capacity diesel engine, as the power boost may not be enough. In that type of situation, you are left with a dead engine and a warm fridge.
You can get an isolator that will override the dual connection, this preventing the loss of power in the deep-cycle battery if it does not have enough remaining power to be used in a dual-battery start-up.
The one thing that should be clear by now is that if you love to get out into the wild in your vehicle, you need some type of battery backup in place so that getting stranded becomes a non-factor.
Do It Right
The correct isolator is important, but equally so is the dual-battery installation. In an ideal world, the second battery would go right into the engine bay, but modern vehicles leave little to no space for such a set-up. There is also a lot of heat in that engine bay, and we all know that batteries, particularly the absorbed glass mat variety, are not fond of those high temperatures.
It’s usually quite easy to add a deep-cycle battery or power pack to the back of your vehicle, although it’s important that correct cable size is used to connect to the starting battery, as failing to do so can result in a voltage drop. It’s also possible to get a protective case for your deep-cycle battery that can be stored inside your vehicle.
Things get a little trickier with modern 4WD’s, as a simple isolator is not enough for the job. If you have a newer vehicle, you will need a purpose-designed auxiliary battery DC-DC charger.
The best quality materials need to be used for all connections. Improper connections or poor quality pieces will only lead to problems.
Here at Harmac Auto Electrics, our professional technicians can install your dual battery system quickly and efficiently, so that you never need to worry about power again.
Call us today for COMPETITIVE PRICES and GREAT LOCAL SERVICE
For all your auto electrical problems, please call Mark on 0409 343 050.