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--- multiplus_faq [2023-02-16 01:50] – guy_stewart
+++ multiplus_faq [2024-07-17 06:57] (current) – [4.1 PowerAssist] guy_stewart
@@ Line 193: / Line 193: @@
 ===== 4.1 PowerAssist =====
+{{::cleanshot_2024-07-17_at_14.54.43.jpg?600|}}
 The [[https://www.victronenergy.com/upload/documents/White-paper-Achieving-the-impossible-EN.pdf|PowerAssist feature]] can be extremely useful, however it restricts the minimum AC input current limit and this may exceed your generators ability to supply. The [[https://www.victronenergy.com/blog/2018/04/20/multiplus-quattro-inverter-chargers-improved-current-limits/|exact restriction varies between models - see here for the list.]]
 If you have a small generator and have trouble getting connected or staying connected, Disable PowerAssist to allow the device to reduce the AC input current limit.
+There is an additional configurable parameter of PowerAssist called "Boost factor"
+When the Multi is charging from the generator, and the current required exceeds the AC input current limit (due to a sudden additional load) then the Multi will switch to PowerAssist mode.
+At that moment the precise current needed is unknown. The Multi uses the "Assist current boost factor" setting as a multiple of the AC input current limit, and attempts to provide that much additional current.
+In some cases this multiple is either too high, or too low. This would most likely present as the generator unable to stay connected, or fluctuations to the frequency and voltage.
+The fastest way to diagnose if setting may be interfering with your specific generator and load operation is to disable power assist entirely. If that resolves the issue, then try reducing the Assist current boost factor down until it works reliably and still getting the benefit of the feature without the interference. The optimal value for this will depend on the size of the inverter, the size of the generator, and the size of the load.
 ====== 5. Generator control in 3 phase and parallel systems ======