CTEK's Zafir 45. Club offer

Mahseve

Hi. I know similar questions will have been asked before, but being a newbie and non-tech, humour me.

The CTEK charger, club offer, looks good value for money, but I've read somewhere that a van battery needs an occasional boost to 14v+, other thatn car use. Will this charger cover all the needs? The description states " CTEK's Zafir model is suitable
for charging all types of 12V lead-acid battery with a capacity of up to 90Ah and for maintaining batteries up to 120Ah".

I have a 100 Ah, does this mean it won't charge it? Sorry to sound stupid. but it's not difficult for me to.