Installing A Second Battery For Car Audio
The only thing a second battery will help you with is parking lot listening time. Deciding to add an extra battery is dictated by the system and how it will be used and an alternator upgrade. A second battery can be installed anywhere in the car but it has to be in a place that allows it to connect to the alternator. The reasoning is pretty simple here.
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Two batteries wired in parallel can discharge much more amperage than what a single run of 10 - or a 300a fuse can handle.
Installing a second battery for car audio. After the vehicle is started the second battery becomes another load on an already overworked alternator. If youll be using isolator then insert the item right after the alternator in your diagram. To estimate the listening life of your battery or determine how much charging power your second battery should have use the following equation.
At your destination you throw the switch the other way disconnecting battery number two from the system and using it for power at the campsite. The ground wire is not required unless youre drawing more than 125A. November 03 2006 at 1152 AM IP Logged.
Here are the steps for installing a second battery in your car. Of course two batteries an amplifier some normal wires to connect the amplifier and the speakers. In this case youre typically going to get the best results by ditching your existing battery and putting in two matched batteries.
Second Batteries for High-Performance Audio. Personally i wont use less then 2ga power and ground wire and then just use a fuse before the isolator and then one after close to the battery. Depending on your system demands from my experience dual runs of 10 - from battery to battery is worthwhile.
10 X Battery capacity in Amp Hours Load Power in Watts Running time in hours. If you run it like you only had one bat the load would be the same. The components include two blue four gauge wires two red four gauge wires.
Basically it will provide you the additional capacity to run your stereo longer without starting the vehicle. A second battery to double the amount of power that you have stored can help solve the problem of headlights dimming or the car audio system not performing to its optimum. If you think about it its not that hard.
I would recommmend isolatorrelay in multi battery setup. Then from there battery 1 and 2. And make sure you get a good ground on the battery.
If your concern is listening to music you can easily calculate the current needs of your stereo. This would result in numbers that look like this. The aim of the extra power supply is to provide your campsite with readily available.
The second battery should be wired in parallel with the original battery and most car audio competition experts will suggest that you buy matched batteries instead of wiring a high performance battery into a configuration that includes an existing battery thats already old and tired. If you add a second battery the time will go up. The batteries should be the exact same brand group and age.
The cars chassis is equal to 4ga power wire. Here is a visual demonstration of the wiring configuration that goes in to adding a second car batteryincluding an ampand a lil something at the end for my. Then ground the isolator and run a ignition wire to it.
Your battery would charge at around 15 amps at most at 14-16 volts this is dependent on your regulator no real smart hardware needed. 10 x 70 300 233 hours. If your car audio system has an aftermarket amplifier and a correspondingly higher load the amount of time youll be able to run your stereo with the engine off will go down.
First off even if your second battery is substantially drained it will still only charge at the same rate. The second battery is usually placed in a dedicated space on a purpose-built tray in a vehicles engine bay or in the cabin or in the tray if its a ute or load space at the rear. To setup a car audio system with a second battery you must need the components for car audio system.
When your trucks running you flip the switch that connects the second battery to the system allowing it to be charged by the alternator. This is perfectly safe although its important to follow wiring and installation best practices. Customers often ask us if they need to add an extra battery or two when installing a large car audio system that includes multiple amps speakers and subwoofers.
Assuming you truthfully have 30 amps of overhead then this is not even a consideration. In the absence of this connection the battery drains in no time. Adding a second battery provides plenty of reserve amperage to the system and can also be placed very close to the amplifier.
The other way to add extra reserve battery capacity is to actually add a second battery. The auxiliary battery should be positioned on a purpose-built tray as pictured or a battery box. Finally 6 x 9 speakers for your car a pair.
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