I have a XPS dual bank 10/10 charger, vsr, battery switch, and two Optima Blue batteries. The charger's normally plugged in and the switch set to off so the banks can charge independently while garaged. I like to flip the switch and run the stereo while working on the boat. It's just over 1000 watts total & never crank it too loud in the garage - maybe 1/4, so ~20 amps @ 14V. The charger has "Tranfer On-Demand" so that supposedly all 20 amps are available to the stereo battery if the house battery is charged.
Will I damage the charger if I keep it plugged in while playing the stereo? Will a plugged-in charger act as a transformer & keep from draining the battery while the stereo's playing?
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Thread: On-board charger while playing?
05-22-2013, 11:24 PM #1
On-board charger while playing?89 Supra Saltare Restoration Project
05-22-2013, 11:27 PM #2Malo <--- Means--Evil or Mean One. This explains a lot.
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05-23-2013, 12:14 AM #3
A 1000 watt stereo might draw an average of 50 DC amps at full unclipped power. As you reduce power the amplifier efficiency will decline so 1/4th power would pull more than 12.5 amps. Keep this in mind. A 10 dB difference is interpreted as half as loud or twice as loud. A 10 dB reduction is 1/10th the power. So if you perceive the stereo to be playing at 1/4 volume you should not approach the full capacity of a 20 amp charger. On that basis it sounds safe enough. Make sure your batteries are fully topped off first. The moment you see the battery voltage begin to drop, you are running the charger too hard.
05-23-2013, 07:18 PM #4
Thanks guys - I'll be sure not to overwork the charger & unplug it if the eardrums get to feeling frisky...89 Supra Saltare Restoration Project