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Omega Electrical and Audio Help / Re: Fitting second battery...
« on: 28 February 2014, 09:05:02 »
Are you sure that you need such an enormous current feed to the boot battery? Granted you might need a heavy load from battery No. 2, but not to charge it, surely?
Ok, assuming that you really do, why not feed your alternator to each battery via a 200 Amp Schottky diode. "Schottky, because they have a low forward voltage drop of around 0.2 volt, "diode" because you want current to feed to each battery only and effectively have them isolated from each other - i.e. current cannot flow from either battery to the other. I wish I knew how to draw diagrams on here.....
The minimal voltage drop due to the diodes should not affect even today's clever regulators on the alternator and it is fully automatic - no need to remember to switch anything!
Ron.
P.S. Don't forget to use a grown-up cable to the boot battery if you really do need that heavy a current feed.
Ok, assuming that you really do, why not feed your alternator to each battery via a 200 Amp Schottky diode. "Schottky, because they have a low forward voltage drop of around 0.2 volt, "diode" because you want current to feed to each battery only and effectively have them isolated from each other - i.e. current cannot flow from either battery to the other. I wish I knew how to draw diagrams on here.....
The minimal voltage drop due to the diodes should not affect even today's clever regulators on the alternator and it is fully automatic - no need to remember to switch anything!
Ron.
P.S. Don't forget to use a grown-up cable to the boot battery if you really do need that heavy a current feed.