Differences

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--- electrical:12v:alternator_details [2024/03/29 19:44]
frater_secessus [dual alternators]
+++ electrical:12v:alternator_details [2025/02/26 11:29] (current)
frater_secessus [Heavy duty / high output]
@@ Line 235: / Line 235: @@
   * temperature monitoring so maximal current can be extracted without overheating
   * RPM-based output limits
+  * slowly ramping up current to avoid belt slippage/damage
+  * shutoff when commanded by BMS
+  * CANBUS and other communication
   * etc
@@ Line 274: / Line 277: @@
 [[https://www.nationsstarteralternator.com/|Nations]] and similar alternator builders make alternators for specialty uses.
-Note that increasing alternator output may require upgrading stock chassis wiring:
+=== big three ===
+Note that increasing alternator output may require upgrading stock chassis wiring.  Often called "the Big Three":
+  - POS from alternator to starter battery
+  - NEG from starter battery to chassis
+  - NEG from chassis to engine block
 >> To run a [high output] alternator, ALL of your engine's factory high current cabling will need to be [sized] to support it, including engine and starting battery grounds, and alternator positive. -- MechEngrSGH((https://www.irv2.com/forums/f87/alternator-burn-out-from-lithium-batteries-558284-8.html#post6428559))
+In addition, the wiring from the starter batt or alternator to the house battery bank may require upsizing to actually get that current where you want it to go.
 ==== Idle optimized ====

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