There's a
BIG difference between 'can' and 'should'
As I made clear previously, while using small low current panels at too high a voltage can't damage a battery, it's poor design and
VERY wasteful.
Optimization is important to get the best performance at the lowest cost.
My point all along, is that unless your panels are particularly large, and your battery particularly small, then you don't need a regulator - and shouldn't have one (it's just wasting money and energy for no positive result).