Differences

This shows you the differences between two versions of the page.

--- assistants:pv-inverter-support [2018-06-22 18:03] – [Q1 - The system is locked to 53 Hz and does not resume] mvader
+++ assistants:pv-inverter-support [2023-10-10 11:47] (current) – [1. When to use] sloges
@@ Line 5: / Line 5: @@
 ===== 1. When to use =====
-Use this Assistant in Off-grid systems that have AC-Coupled solar power: a grid-tie PV inverter connected to the AC out of a Multi or Quattro inverter/charger.
+Use this Assistant in Off-grid systems that have AC-Coupled solar power: a grid-tie PV inverter connected to the AC out of an inverter inverter/charger.
-Also use this Assistant for systems connected to the grid, that for a particular reason are not setup as ESS and its Assistant.
+Compatible with Multis, Quattros as well as Inverters that have a VE.Bus connection.
-Usually all mains-connected systems do need the ESS Assistant, and in that case do not also install the PV Inverter Assistant.
+Also use this Assistant for systems connected to the grid, that for a particular reason are not setup as ESS and therefor not using the ESS Assistant. Usually all mains-connected systems do need the ESS Assistant, and in that case do not also install the PV Inverter Assistant as well.
 ===== 2. Summary of functionality =====
 When the system is in inverter mode, this Assistant controls the output power of the grid-tie inverter by changing the AC output frequency of the system. A mechanism commonly refered to as Frequency Shifting. It does so to regulate the charge process: limiting the output power of the Grid-tie inverter to proper manage the charge and also prevent overcharge of the batteries.
@@ Line 19: / Line 19: @@
 The Assistant will use the AC-output frequency to keep both the charge current and the charge voltage within limits.
-To prevent overshoots because of varying solar irradiance and/or load fluctuations, it will limit the charge current already before battery voltage has rised up to the absorption voltage. It will derate the maximum charge current from 100% at 13.5 / 27 / 54V to 10% at 14.4 / 28.8 / 57.6V. These thresholds are **not** related to the configured absorption voltage.
+To prevent DC and AC voltage overshoots because of varying solar irradiance and/or load fluctuations, it will limit the charge current already before battery voltage has rised up to the absorption voltage. It will derate the maximum charge current from 100% at 13.5 / 27 / 54V to 10% at 14.4 / 28.8 / 57.6V. These thresholds are **not** related to the configured absorption voltage.
 ===== 4. Related documentation =====
   * [[:ac_coupling:start]]
-  * [[:ac_coupling:start|factor 1.0 system design rule]]
   * [[ac_coupling:fronius|]]
   * [[ccgx:ccgx_fronius|]]
@@ Line 46: / Line 45: @@
   * the mentioned 53 Hz is the PV Inverter disconnect frequency as configured in the Assistant, default 53 Hz.
-===== 5. DISQUS =====
-~~DISQUS~~