Quote:
Originally Posted by Astro
I am not using the contactor for reversing, it is just for isolating the battery pack from the controller, DC-DC converter etc.
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Per Mechman600's post, the battery bank is isolated from the controller by a DC contactor (I would add 'or a vacuum contactor').
The polarity is an issue when you are trying to break the flow of current, like during a short circuit of the battery or when the power electronics on the controller fails.