coastalconstruction
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whats the best way to get 12 volts from a 24 volt system ? can you tap 1 battery?
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12 volts from a 24 volt system
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Yes, but you should ideally recharge both batteries to the same condition after each use, like in when you get back home.coastalconstruction said:
How much power (=current drain) is needed?
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RE: Re: 12 volts from a 24 volt system
Bjorn is right: You can't rely on a 24V alternator to fully re-charge the battery that is being "tapped", since the current is split between the batteries. The one being tapped needs more than the other, so it will be undercharged, while the other will be overcharged. This is why the CUCV's have two 12V alternators (one for each battery - except the M1010 system, which is an entirely different story).
Bjorn is right: You can't rely on a 24V alternator to fully re-charge the battery that is being "tapped", since the current is split between the batteries. The one being tapped needs more than the other, so it will be undercharged, while the other will be overcharged. This is why the CUCV's have two 12V alternators (one for each battery - except the M1010 system, which is an entirely different story).
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RE: Re: 12 volts from a 24 volt system
Here's what I did using a battery equalizer and it works perfectly.
http://www.bunkerofdoom.com/mil/m35/vic4/index.html
Here's what I did using a battery equalizer and it works perfectly.
http://www.bunkerofdoom.com/mil/m35/vic4/index.html
Michael
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RE: Re: 12 volts from a 24 volt system
The best way is to get a solid state 24v to 12v converter. For small loads like a cell phone charger just tap the center post of the batteries.
The best way is to get a solid state 24v to 12v converter. For small loads like a cell phone charger just tap the center post of the batteries.
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Re: RE: Re: 12 volts from a 24 volt system
I like POL (point of load) type regulators to keep from adding a 12-volt circuit to the already existing wiring. For example, the CB in my deuce has its own little 24 to 12 volt regulator in a box, tapping the nearest available 24 vdc circuit.
Patrick, let's say that you are using the lower battery extensively, (current exceeding the equalizer capacity) and then shut down the engine/charging system, do you not risk ending up with two poorly charged batteries for the next time the engine is started, or am I missing something?OPCOM said:
I like POL (point of load) type regulators to keep from adding a 12-volt circuit to the already existing wiring. For example, the CB in my deuce has its own little 24 to 12 volt regulator in a box, tapping the nearest available 24 vdc circuit.