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--- electrical:solar:charge_controller_setpoints [2017/10/26 21:37]
frater_secessus [charging setpoints]
+++ electrical:solar:charge_controller_setpoints [2017/10/26 21:47]
frater_secessus [load setpoints]
@@ Line 4: / Line 4: @@
 ===== charging setpoints =====
-Most charging-related setpoints are //voltages//.
-  * Float voltage (Vfloat) - the voltage the battery bank is held at during [[electrical:12v:charging#float_stage|Float]].  Common setpoint in most configurable controllers.
+  * **Float voltage (Vfloat)** - the voltage the battery bank is held at during [[electrical:12v:charging#float_stage|Float]].  Common setpoint in most configurable controllers.
-  * Absorption voltage (Vabs) - the voltage the battery bank is held at during [[electrical:12v:charging#absorption_stage|Absorption]].  Common.
+  * **Absorption voltage (Vabs)** - the voltage the battery bank is held at during [[electrical:12v:charging#absorption_stage|Absorption]].  Common.
-  * Absorption duration - the amount of time Vabs will be held until dropping to Vfloat.  Somewhat common.
+  * **Absorption duration** - the amount of time Vabs will be held until dropping to Vfloat.  Somewhat common.
-  * Absorption termination current  - the amount of current (or percentage of capacity) Absorption must fall to before dropping to Vfloat.  Not common.
+  * **Absorption termination** - the amount of current (or percentage of capacity) Absorption must fall to before dropping to Vfloat.  Not common.
-  * Absorption restart - voltage (or duration) at which Absorption stage after failing to maintain Vfloat
+  * **Absorption restart** - voltage (or duration) at which Absorption stage after failing to maintain Vfloat
 ===== load setpoints =====
+Only present on controllers with LOAD outputs.
+  * **Low voltage disconnect (Vlvd)** - voltage at which the controller turns off loads to prevent excessive battery discharge.  Typically something like 12.1v (the voltage at 50% [[electrical:depth_of_discharge|depth of discharge]]).  Heavier loads that cause voltage sag may require setting a lower Vlvd so the voltage pops back up to 12.1v((or whatever)) when the load is removed.
+  * **Low voltage reconnect (Vlvr)** - the setpoint at which the load is turned back on after recovering from Vlvd cutoff.  Vlvr > Vlvd.  If Vlvr is set too close to Vlvd the loads may continually toggle on/off.

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