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post #1 of Old 09-27-2008 Thread Starter
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Switching battery banks with engine running

This is basically an alternator question. I have the typical battery switch OFF, 1, BOTH, 2. This is a mechanical switch designed to make contact with the BOTH position while still making contact with Bat 1 or Bat 2. So the question is will the alternator be damaged if I switch from Bat 1 to BOTH and then to Bat 2?? The alternator will always see a battery when doing this but there may be change in voltage from one battery to the other and also when in the BOTH position. I called Balmar and could not get a straight ans....they recommended a dual batter isolator. I still want to know if the alternator will be damaged and if so why? Thanks for your help
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