I had to buy a seperate Magnum ME-ARC controller to access all of the programming features of the Magnum inverter on my 2018 Palazzo 33.2 (to program the "Custom" settings for my Li batteries) as the Firefly controller does give access to many of the functions or menu options.
If you read your Magnum inverter/charger manual, the default setting for Wet/Flooded batteries may include an equalizing function (i.e. every 28 days, like on the GoPower solar controller)
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