Marine battery isolator 2 bank11/4/2023 The 1/2/B is switching only the DC positive conductors and has nothing at all to do with DC negative. If I had a dime for every-time this question was asked, I’d not be writing this article. “But RC where does DC ground connect to on the 1/2/B?” A 1/2/B switch has just three terminals and four positions. One area of confusion we see fairly routinely is a boat-owner misidentifying the 1/2/B switches terminals. MHT Recommended Products Affiliate Disclaimerġ- Bank Isolation – The ability to isolate a battery bank from both loads and charge sources in the event of a bank or battery failure.Ģ- Cross-Connection Use – The ability to use either on-board battery bank as the sole use bank, meaning it serves as starting and house load bank in an emergency, This design criteria should always include #1.ģ- Ease of Use – A battery switching design is no good if the boat owner does not understand it. Many boat owners don’t have the luxury of starting from scratch and the existing switch can usually be re-used/re-purposed easier, and in a less costly way, than converting to an entirely new switch configuration. This article is only intended to showcase how the 1/2/BOTH switch can be used in an easier and often less confusing manner. Let me be clear on this point this is not our preferred method, it is simply a method. Preface: I’ve seen & read many on the internet suggest that “The 1/2/BOTH is RC/Rod’s/Compass Marine’s preferred switching method”.
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