Battery Power & Charging
With 480Ah of Rolls batteries, and arguably any make, the bulk charge stops at a voltage, is set correctly given the battery temp, when the battery is 80% charged (see Rolls data). Then the required charge is 20% of 480 or 96Ah. This is some 12A for another 6hr. or 6A for 12.
The absorption charge is time limited on the Victron, depending on initial voltage read. So no matter the Ah of the battery once it reaches the absorption voltage it will only charge at that rate for a specific period. To override this I am setting the float voltage to the same level as absorption on the basis that it is not easy to get 12A for 6hr on most days. If this seems to evaporated water then I'll reduce it a level calculated by my temp adjustment figures.
Created by • Last edit by on 03 Aug 2018