I started using a float charger I picked up at Harbor Freight.
I do not use the trickle charger type.
I have a Honda pioneer 500 SxS
I installed a dash board volt meter to show batter charge.
With machine running its around 14 to 14.5.
On the float charger it stays at 13.2.
If I let it sit with out the charger on after a few days the battery reads 11.3
I also carry a booster pack.