We have installed 4x110A 12V Sonnenschein Prevailer batteries for household in 1991 and since then we used battery
chargers of different brands(110V and 220V) and back in Europe
we installed a Victron Phoenix 12/60 charger
in 1998. We lived onboard for a couple of years and the last few years we are using the sailboat for 3 month at least continuously. While sailing/on the hook solarpanels (2x55Amp) and a Air-X windgen. charging
enough for our purpose. Large coolboxes (usa build boat), not that big cooling
unit (draws ca. 3Amp - no freezing, just cooling) and as long as the white wine and the italian proseco are cool, the lady smiles.
I wonder if this life cycle of more then 18 years is exceptional for batteries.
So yes, I recommend by experience the gel type.