Quote:
Originally Posted by Lushy
Just put somesort of daul battery management system in the circiut close to the first battry.
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This is a simple DIY solution I am using for mine:
It switches the 2nd battery on to the alternator after about 6minutes, to give the main battery some time to charge by itself for a while. It disconnects the 2nd battery from the main battery and alternator automatically.
The "solonoid" is a 12v Cole Hersee heavyduty relay.
Even less complicated, but no timing function. Use pushbutton to switch ON, auto switch OFF when ignition OFF: