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--- dc_coupling:using_bmv_soc_in_a_vebus_assistant_setup [2015-09-04 12:07] – martijncoster
+++ dc_coupling:using_bmv_soc_in_a_vebus_assistant_setup [2016-03-26 22:49] – wcsw
@@ Line 1: / Line 1: @@
+Using the BMV relay for AC load dump control. Looking through the relay settings I missed one control function that we can use for a high voltage, high SOC load dump function.
+Prior to the install of the BMV we had successfully tested the high battery load dumping with a Morningstar relay driver. We used the Morningstar relay to switch on a hotwater system element 1200W. By using 3 relays we could switch on 3 heating elements. Yesterday we successfully connected the BMV relay to close relay at 56.1. This activated a 48 volt DC powered relay and switched the AC power for the hotwater element.
+The control functions of relay close and relay open can be configured so that excess power when AC coupled will allow this function to be activated.
+Leigh Horton
 ====== Using BMV state of charge in an Assistant ======
 ===== Introduction =====
-This can be very useful for DC connected solar energy systems where the VE.Bus SOC is not accurate. The goal is to ignore AC in, unless the battery SOC measured via the BMV falls below 50%. Configure the BMV to close its relay when the SOC falls below 50%. [[http://www.victronenergy.com/battery-monitors/BMV-700#manual|For the BMV 700 read the manual section, 4.2.2 relay settings]]
+This can be very useful for DC connected solar energy systems where the VE.Bus SOC is not accurate. The goal is to ignore AC in, unless the battery SOC measured via the BMV falls below 50%. Configure the BMV to close its relay when the SOC falls below 50%. [[https://www.victronenergy.com/battery-monitors/BMV-700#manual|For the BMV 700 read the manual section, 4.2.2 relay settings]]
 Now the BMV will close the relay when the battery SOC is below 50% and this signal can be connected to Aux1 or the temperature input, for example, on the Multi.
@@ Line 16: / Line 20: @@
 The next step is to load 3 assistants in the Multi.
-st assistant "programmable relay" to give the condition when to set the General Flag OFF.
+st assistant "programmable relay" to give the condition when to set the General Flag ON.
   * Use General flag
   * Set Relay on
   * When auxiliary input 1 is open for 1 seconds
-nd assistant "programmable relay" to give the conditions when to set the General Flag ON
+nd assistant "programmable relay" to give the conditions when to set the General Flag OFF
   * Use General flag
   * Set Relay off