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electrical:12v:multipoint_charging

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electrical:12v:multipoint_charging [2018/12/12 20:56]
frater_secessus [concurrent charging] 		electrical:12v:multipoint_charging [2020/03/18 13:45]
frater_secessus [why one source wins]
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   * **13.9v** a few miles down the road. Voltage is climbing but all three sources are still charging.   * **13.9v** a few miles down the road. Voltage is climbing but all three sources are still charging.
   * **14.1v** by the you get to a neighboring town.  **Alternator charging ceased at 14.0v**; it has plenty of current but no voltage "pressure" to force that current into the battery.  Your battery bank is now being charging only by solar (the two separate controllers).   * **14.1v** by the you get to a neighboring town.  **Alternator charging ceased at 14.0v**; it has plenty of current but no voltage "pressure" to force that current into the battery.  Your battery bank is now being charging only by solar (the two separate controllers).
-  * **14.6v** in the parking lot as you stop at an Oasis [[:water|water kiosk]].  **The Morningstar stopped contributing at 14.4v**((Absorption is the stage where the controller provides as much current as it takes to hold Vabs, 14.4 in the Morningstar's case.  **It takes zero current to hold 14.4v when the bank is 14.6v**, so the Morningstar just sits there.  It might drop into Float.)) so we are down to just the Xantrex.  +  * **14.6v** in the parking lot as you stop at an Oasis [[water:drinking|water kiosk]].  **The Morningstar stopped contributing at 14.4v**((Absorption is the stage where the controller provides as much current as it takes to hold Vabs, 14.4 in the Morningstar's case.  **It takes zero current to hold 14.4v when the bank is 14.6v**, so the Morningstar just sits there.  It might drop into Float.)) so we are down to just the Xantrex.  
   * **14.7v** on your way back to camp.  This is Absorption setpoint (Vabs) of the Xantrex, the highest setpoint of all three.  The Xantrex will continue the Absorption stage by itself until that stage is complete, then drop back to Float voltage (Vfloat).((where the Morningstar has probably been waiting, twiddling its thumbs))   * **14.7v** on your way back to camp.  This is Absorption setpoint (Vabs) of the Xantrex, the highest setpoint of all three.  The Xantrex will continue the Absorption stage by itself until that stage is complete, then drop back to Float voltage (Vfloat).((where the Morningstar has probably been waiting, twiddling its thumbs))
  
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 So how do we make them all charge all the time? So how do we make them all charge all the time?
  
-Barring heroic measures((exotic alternators/regulators, DC-DC chargers)) the alternator is going to stop contributing at some point during Bulk charging.  That is ok, the alternator provided a ton of current while it was charging.+Barring heroic measures((exotic alternators/regulators, [[electrical:12v:b2b|DC-DC chargers]])) the alternator is going to stop contributing at some point during Bulk charging.  That is ok, the alternator provided a ton of current while it was charging.
  
 But if you want to the charge controllers (and some [[electrical:converter|converters]]) can be convinced to stay roughly in sync and keep charging together.  This is done by **configuring the Absorption and Float setpoints on the controllers to be the same**.((including Absorption termination setpoints like time or current))  There will be short periods where one controller makes a change before the other, but for most of the time both will be contributing at the same time. But if you want to the charge controllers (and some [[electrical:converter|converters]]) can be convinced to stay roughly in sync and keep charging together.  This is done by **configuring the Absorption and Float setpoints on the controllers to be the same**.((including Absorption termination setpoints like time or current))  There will be short periods where one controller makes a change before the other, but for most of the time both will be contributing at the same time.
electrical/12v/multipoint_charging.txt ยท Last modified: 2024/03/29 18:55 by frater_secessus

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