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--- drafts:using_bmv_soc_in_a_vebus_assistant_setup [2015-04-03 01:02] – created anco
+++ 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: @@
-Ignore AC-in dependent on BMV SOC Value
+====== Using BMV state of charge in an Assistant ======
-The logic is easy when it is shown how it works ;-)
+===== Introduction =====
-This can be very useful for either DC connected solarenergy systems where the VE-bus SOC is not accurately. Goal is for example to ignore AC in unless battery SOC measured via BMV falls below 50%. For this to happen we need a simple two wires between BMV relay and aux1 on the multi. Configure the BMV to close its relay when SOC falls below 50% For BMV 700 read manual 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 battery SOC is below 50% this signal can be connected to Aux1 or temp input for example on the multi.
+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.
-Next thing to do is to load 3 assistants in the multi.
+===== Wiring =====
+For this to happen we need two wires between the BMV relay and Aux1 on the Multi:
-st assistant "programmable relay" to give condition when to set the General Flag of.
+{{ :drafts:bmvplusmulti-soc.png?nolink |}}
-Use General flag
-Set Relay off
-When auxiliary input 1 is open for 0 seconds
-nd assistant "programmable relay" to give conditions when to set the General Flag on
+==== Load and configure the Assistants ====
-Use General flag
-Set Relay on
+The next step is to load 3 assistants in the Multi.
-When auxiliary input 1 is closed for 0 seconds
+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 OFF
+  * Use General flag
+  * Set Relay off
+  * When auxiliary input 1 is closed for 0 seconds
 rd assistant "general flag user"
-Use general flag to ignore AC input 1
+  * Use general flag to ignore AC input 1
+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.
-With these three assistants used together ac input 1 will be ignored when the BMV closes its relay.
-For those people who do not want to use Hub 2 assistants they can use above three assistant plus at bottom position assistant "Inverter support" By doing this you will have also AC connected solar taken care of and still using your BMV SOC as the deciding factor to accept grid or not.
+===== DISQUS =====
+~~DISQUS~~