muddy4x4xfar Posted February 18, 2014 Share Posted February 18, 2014 hey all. Can anybody give me some clue on how to wire up an auxillary alternator up to the second battery? any help is much appreciated. cheers chris Quote Link to comment Share on other sites More sharing options...
Boydie Posted February 19, 2014 Share Posted February 19, 2014 Why not just use a Redarc ? Battery 1 (main gets chargedfrom the alternator) Battery 2 (Auxillary) then gets charged, Battery 1 will discharge to Battery 2 down to 12.8 volts and then the Redarc will switch off to cease to supply power to Battery 2 so you will always have enough charge to start. I've had one in my charging system now for over 2 years and never had a problem, the deep cell auxillary supplies power to a 40 litre fridge/freezer, 240 volt inverter, the winch and all other auxillary points such as fixed LED external tent lighting and the satellite phone. The main battery just handles starting, driving lights, engine, guages and radio. Quote Link to comment Share on other sites More sharing options...
ejparrott Posted February 19, 2014 Share Posted February 19, 2014 Main feed to second battery as normal, you need to install a second 'charge light' and wire this with a live feed from the battery to one side and the other to the connection on the alternator. You do NOT need to isolate the second alternator from the vehicle as some people will have you believe! Quote Link to comment Share on other sites More sharing options...
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