Differences

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--- ess:ess_mode_2_and_3 [2021-03-20 03:19] – guystewart
+++ ess:ess_mode_2_and_3 [2022-12-07 14:14] – [2.2 Accessing the control points] iburger
@@ Line 105: / Line 105: @@
   * com.victronenergy.settings /Settings/CGwacs/MaxDischargePower      (Maximum inverter power)
   * com.victronenergy.settings /Settings/SystemSetup/MaxChargeCurrent  (DVCC maximum charge current)
-  * com.victronenergy.settings /Settings/CGwacs/MaxFeedInPower         (Maximum system grid feed-in)
+  * com.victronenergy.settings /Settings/CGwacs/MaxFeedInPower         (Maximum system grid feed-in of excess power)
   * com.victronenergy.settings /Settings/CGwacs/OvervoltageFeedIn      (Feed-in excess DC-coupled PV)
   * com.victronenergy.settings /Settings/CGwacs/PreventFeedback        (Don't feed in excess AC-coupled PV)
@@ Line 161: / Line 161: @@
   * Register 68: Overvoltage feed-in limit for L3
+=== f) Power Setpoints acts as limit - Modbus-TCP register 71 ===
+When this register is set to 1, the Multi will feed in overvoltage up to the value in registers 37, 40 and 41. This is useful when powering loads with excess DC-coupled PV, while still keeping the batteries fully charged. The Power setpoints are then set to match the loads as normal, but the Multi will feed in only excess PV and not energy from the batteries.
+=== g) Overvoltage offset - Modbus-TCP register 72 ===
+When feeding excess DC-coupled PV to loads or into the grid, the Multi has two possible settings. It can either add a 1V offset to the solar charger charge voltage, or a 100mV offset. These values are for a 12V setup, and must be multiplied by 2 or 4 for a 24V or 48V setup respectively.
+The larger 1V setting is a legacy setting and is now discouraged. When using ESS mode 3 with the overvoltage feed-in feature, it is recommended that you set this register to 1, which will use the lower 100mV offset.
 ==== 3.3 Running software on the GX device and using DBus paths ====
@@ Line 266: / Line 273: @@
 (Length, 0xFF, ‘W’, 0x85, Lo(ValueA), Hi(ValueA), Lo(ValueB)*, Hi(ValueB)*, Checksum)
-ValueA is the contents of RAMID 128. In this example it is 0x0032 which indicates ESS with 2 extra RAMIDs.
+ValueA is the contents of RAMID 128. In this example it is 0x0032 which indicates AssistantID = 3 with 2 extra RAMIDs. (3 is the ID of HUB-4 which is the predecessor of the ESS assistant)
 //*) Please note  that you will get an extra ValueB. This is a feature of newer Multi firmware versions. Because the IDs range from 0..255 the Hi(ID) field would always be 0.
@@ Line 368: / Line 375: @@
   * Set register 37 to -1000
-===== DISQUS =====
-~~DISQUS~~