How long will stereo system run using a deep cycle battery?
Posted on May 23rd, 2010 by admin
I’m building an ice chest stereo and wondering about how long it would run on a deep cycle battery? It will have an aftermarket cd player powering 4 speakers. I was thinking about adding an amplifier and 12 inch subwoofer to the system but do not know about how long the battery would run it with that set up. I know there are many variables such as the music volume and the size of battery, but just an average guess would be fine. Thanks!
i have one in my camper if i just run the cd player and 4 speakers it will play 24 hours a day for days at any volume.i all so have a sub with 400 watt amp if i run that at a high volume its dead in about 4 or 5 hours. and thats with a BIG battery
May 23rd, 2010 at 8:53 am
i have one in my camper if i just run the cd player and 4 speakers it will play 24 hours a day for days at any volume.i all so have a sub with 400 watt amp if i run that at a high volume its dead in about 4 or 5 hours. and thats with a BIG battery
References :
May 23rd, 2010 at 9:03 am
If you have never dealt with deep cycle batteries, you may have run across the term “Amp Hours” abbreviated Ah. This term is used to express the storage capacity of deep cycle batteries. This is the maximum sustained amperage drawn from a fully charged battery over a certain time period to a point where the battery is at 100% DOD (depth of discharge), for all purposes dead! This amperage is then multiplied by the discharge period to give the battery its Ah rating. The period of time used to drain and measure the battery is usually 20 hours, although longer or shorter time periods may be used depending on the application.
As an example, a 200Ah (20 hr rate) battery can sustain a 10-Amp draw for 20 hours before reaching 100%DOD. 10 Amps X 20 hours = 200Ah. You may say that this same 200Ah battery should last 4 hours with a 50Amp draw, but this is not the case at all. The reason for this non-linearity is that the capacity of a battery actually decreases when the load increases.
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