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--- electrical:12v:charging [2020/10/18 11:49]
frater_secessus [three stage charging] 4+ stages comment
+++ electrical:12v:charging [2020/10/18 11:54]
frater_secessus [bulk stage]
@@ Line 21: / Line 21: @@
 ===== three stage charging =====
-Three stage((some mfg claim 4 or more charging stages, including equalization or proprietary stages.  These three are the essentials.)) or "smart" chargers (whether [[electrical:solar:charge_controller|solar charge controllers]] or [[electrical:converter|converters]]) will follow a common pattern.  Battery manufacturers publish different specs for charging and a good charger will let the user configure the charging stages in accordance with that information.
+Three stage((some mfg claim 4 or more charging stages, including equalization or proprietary stages.  These three are the essentials.)) or "smart" chargers (whether [[electrical:solar:charge_controller|solar charge controllers]] or [[electrical:converter|converters]]) will follow a common pattern.  Battery manufacturers publish [[electrical:solar:charge_controller_setpoints|specs for charging]] and a good charger will let the user configure the charging stages in accordance with that information.  Less-expensive chargers may have presets for charging different battery types; if you get lucky one of the presets will match your manufacturer's charging recommendations.
 SternWake sums up smart charging:
-> "Bulk rate is maximum amps the charging source can supply until the absorption voltage is reached, at that point the amps required to hold the ABSV will taper. The longer the battery is held at ABSV, the more the amps required to hold ABSV will taper. At some point, either time, or the amps required to hold ABSV fall below a threshold and triggers float mode."((http://www.cheaprvliving.com/forums/Thread-Can-a-solar-panel-and-charge-controller-over-charge-a-battery?pid=96956#pid96956))
+> "Bulk rate is maximum amps the charging source can supply until the absorption voltage is reached, at that point the amps required to hold the ABSV((Vabs, absorption voltage)) will taper. The longer the battery is held at ABSV, the more the amps required to hold ABSV will taper. At some point, either time, or the amps required to hold ABSV fall below a threshold and triggers float mode."((http://www.cheaprvliving.com/forums/Thread-Can-a-solar-panel-and-charge-controller-over-charge-a-battery?pid=96956#pid96956))
@@ Line 31: / Line 31: @@
 ==== bulk stage ====
-The bulk stage is a fast and furious rush to get **maximum power returned to the battery bank**.  Since the stage by definition requires all the power the system can generate, this is when controllers typically get the most benefit from MPPT features.
+The bulk stage is a fast and furious rush to get **maximum power((or max //recommended// power)) returned to the battery bank**.  Since the stage by definition requires all the power the system can generate, this is when controllers typically get the most benefit from MPPT features.
 This stage **begins when charging starts** (as when the sun comes up) and **ends when the battery climbs to the acceptance voltage setpoint**, 14.8v in our T-105 example.

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