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--- drafts:using_bmv_soc_in_a_vebus_assistant_setup [2015-04-07 12:20] – john_r
+++ dc_coupling:using_bmv_soc_in_a_vebus_assistant_setup [2019-01-22 10:16] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
-====== BMV state of charge with a VE.Bus assistant ======
+====== 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%. For this to happen we need two wires between the BMV relay and Aux1 on the Multi. 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 (force Inverter mode), 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.
-==== Load assistants ====
+===== Wiring =====
+For this to happen we need two wires between the BMV relay and Aux1 on the Multi:
+{{ :drafts:bmvplusmulti-soc.png?nolink |}}
+==== Load and configure the Assistants ====
 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 off
+  * Set Relay on
-  * When auxiliary input 1 is open for 0 seconds
+  * 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 on
+  * Set Relay off
   * When auxiliary input 1 is closed for 0 seconds
@@ Line 24: / Line 29: @@
   * Use general flag to ignore AC input 1
-With these three assistants used together AC input 1 will be ignored when the BMV closes its relay.
+With these three assistants used together AC input 1 will be used (not ignored) when the BMV closes its relay.
+{{ :dc_coupling:program-relay.png?nolink |}}
+===== Related info  =====
+==== 1. Using ESS instead of above ====
+For many applications, ESS will be a better solution than above explained configuration.
+[[ess:start|]]
+==== 2. Adding the PV Inverter Assistant ====
+For those people who do not want to use the ESS Assistant, but want to add AC-Coupled PV on the output of the Multi, they can use the above three assistants, plus at the bottom position add the "PV Inverter support" Assistant. By doing this you will have also AC connected solar taken care of and still be using your BMV SOC as the deciding factor to accept grid energy or not. This will also work well in case there is AC connected solar and DC connected solar energy.
-For those people who do not want to use Hub 2 assistants (AC out connected solar energy) they can use the above three assistants, plus at bottom position assistant "Inverter support". By doing this you will have also AC connected solar taken care of and still be using your BMV SOC as the deciding factor to accept grid energy or not. This will also work well in case there is AC connected solar and DC connected solar energy.
-{{:drafts:ignore_acin_on_bmvrelais.png|}}
+===== DISQUS =====
 ~~DISQUS~~