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--- ac_coupling:start [2020-06-18 16:13] – [2.4 Should you look at the total PV array, or the PV inverter rating?] marmour
+++ ac_coupling:start [2022-04-12 06:47] (current) – [1.1 What is AC-coupling?] bob
@@ Line 24: / Line 24: @@
   * Systems with only a grid-tied PV inverter will fail when there is a grid black-out. A micro-grid system will continue to operate, and even keep using solar power.
   * It is also possible to run a AC-coupled micro-grid on a generator
-  * Most brands of PV inverters can be used for these systems, they need to be setup to support frequency shifting, often called the island-mode or micro-grid mode. For SolarEdge settings, see [[venus-os:gx_solaredge|]]. For Fronius settings, see [[ac_coupling:fronius|AC-coupled PV with Fronius PV Inverters]].
+  * Most brands of PV inverters can be used for these systems, they need to be setup to support frequency shifting, often called the island-mode or micro-grid mode. For SolarEdge settings, see [[venus-os:gx_solaredge|]], for Fronius settings, see [[ac_coupling:fronius|AC-coupled PV with Fronius PV Inverters]] & for reading and controling ABB/Fimer inverters, see [[ccgx:abb_fimer|AC-coupled PV with ABB/Fimer PV Inverters]].
+  * To read out SMA inverters, see [[ccgx:ccgx_sma|AC-coupled PV with SMA PV Inverters]].
   * If power will be fed back into the grid an anti-islanding device may have to be added to the system, depending on local regulations.
@@ Line 71: / Line 72: @@
 ==== 3.1 Lead batteries ====
-kWp installed PV power requires approximately 5kWh of battery:
+kWp installed PV power requires approximately 5kWh of lead acid battery:
-  * 100 Ah accubank 48 Vdc
+  * 100 Ah at 48 Vdc
-  * 200 Ah accubank 24 Vdc
+  * 200 Ah at 24 Vdc
-  * 400 Ah accubank 12 Vdc
+  * 400 Ah at 12 Vdc
+Each additional 1 kWp of AC PV will require an additional proportional 5 kWh increase in lead acid battery storage.
 ==== 3.2 Lithium batteries ====
-,5 kWp installed PV power requires:
+,5 kWp installed AC PV power requires 4.8 kWh of battery storage:
-  * 100 Ah accubank 48 Vdc
+  * 100 Ah at 48 Vdc
-  * 200 Ah accubank 24 Vdc
+  * 200 Ah at 24 Vdc
-  * 400 Ah accubank 12 Vdc
+  * 400 Ah at 12 Vdc
+Each additional 1.5 kWp of AC PV will require an additional proportional 4.8 kWh increase in battery storage.
 ===== 4 Requirement of adding DC-Coupling - MPPT Solar Chargers =====
@@ Line 89: / Line 92: @@
 Reason: recover from deadlock situation of AC-Coupling only situation.
+There is no Factor 1.0 limit that applies for DC coupled PV through a Victron MPPT. Nor is there a specific minimum amount of battery storage capacity, though please follow battery manufacture specifications for maximum charge rates. A rule of thumb is C10 (10% of Ah capacity in A) for lead acid batteries, and C2 (50% of Ah capacity in A) for lithium batteries.
 ===== 5 Software configuration =====
 Multis and Quattros with factory settings will not shift the AC output frequency to regulate charge current. When setting up an AC Coupled system, install either the [[ess:start|ESS Assistant]] (for grid-connected systems) or the [[:assistants:pv-inverter-support]] (for off-grid systems).
+The Inverter RS will automatically shift frequency without any additional configuration required when a surplus/back-feed of AC is detected on the AC-output.
 Other options, __all deprecated__, are:
@@ Line 101: / Line 108: @@
 ===== Monitoring =====
-See [[ccgx:start|section 1.5 in the GX manual]].
+See [[https://www.victronenergy.com/media/pg/Cerbo_GX/en/installation.html#UUID-347e92f6-0d4b-eef5-9787-22fbcb9aa13c|Connecing a PV inverter section of the GX manual]].
 ===== DISQUS =====
 ~~DISQUS~~