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Old 03-05-2023, 01:08 PM   #12
Chuck v
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Join Date: Dec 2009
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Manual use of the 'emergency start switch' should be limited to short duration as noted several places above and for those RVs that do not have a shore power means to charge the chassis battery can be added as I did.


There is another battery interconnect system that exists in most rigs however that allows the engine alternator to charge all battery banks when the engine is running, and this system has a controller to ensure that the connection is only present when charge conditions are appropriate for the various banks. This capability is usually called a "BIRD" which is an acronym for Bidirectional Isolator Relay Delay and the controller has both delay times and threshold voltages to actuate and stay actuated. This is far different than the 'unattended' or manual emergency start switch.


Chuck
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