Quote:
Originally Posted by mswhin63
I am currently working on an plug and isolation for my car, as we travel to dark sites why not use the juice from the alternator in car to charge the obs batteries. The alternator primarily only supplies the battery to top up or usually at night for the extra consumption of lights etc.
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You want a proper dual battery isolator. It will correctly charge the battery while you drive and not discharge the main battery if you choose to leave it in the car when you get to your obs site.