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--- electrical:12v:alternator [2021/05/20 12:50]
frater_secessus [voltage-sensing relays]
+++ electrical:12v:alternator [2021/06/16 16:35]
frater_secessus [Alternator charging]
@@ Line 12: / Line 12: @@
 In a dual-battery system((starter battery and house battery)) some of the alternator output is used to charge the house batteries when the engine is running.  When the engine is not running **the house battery is electrically isolated** from the starter battery to keep from draining it and leaving you stranded.  So the devices that handle the isolating/combining duties are called //battery isolators//.  There are several different types.
+Normally only the POS((+, positive)) wire is used to route power with an isolator;  the NEG side is the chassis ground.  If no chassis ground is available a NEG wire will need to be run also.

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