Differences

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--- electrical:12v:lvd [2017/05/28 16:49]
frater_secessus [common LVD setpoints]
+++ electrical:12v:lvd [2018/06/23 16:37]
frater_secessus [common LVD setpoints]
@@ Line 1: / Line 1: @@
 ====== Low Voltage Disconnect (LVD) ======
-A low voltage disconnect is used to stop loads from dragging a battery bank below a given voltage.
+A low voltage disconnect is used to stop loads from dragging a battery bank below a given voltage (Vlvd).
-In most installations all loads go through the LVD except the [[electrical:inverter|inverter]], due to the heavy current draw.  The inverter will have its own internal LVD.
+The simplest way to implement an LVD is to wire all loads go through the LOAD output of the charge controller, and set the controller's Vlvd.  If system load is heavier than the LOAD output can provide, one may use:
+  * a stand-alone LVD with higher current rating (more expensive)
+  * or run loads off a [[electrical:12v:relay|relay]] triggered by the LVD (less expensive)
+ except the [[electrical:inverter|inverter]], due to the heavy current draw.  The inverter will have its own internal LVD.
 ===== common LVD setpoints =====
@@ Line 13: / Line 17: @@
 {{ :electrical:12v:ladutycycles.png?direct |}}
-The sweet spot appears to be 40% DoD, about 12.3v.
+The sweet spot appears to be 20-40% DoD, depending on manufacturer.

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