The op could have a Heart interface inverter charger combo
In that trade winds
He didn't say
As for recharge, several days too full top off
But they are probably damaged, and will not regain full capacity, and will need replacement before the should have
No offense, but unless there are health issues, or terribly inclement weather
Checking new batteries is a must do item every month for several months after install, until you get a feel for their needs, putting off cleaning the fans may have caused heat damage to the inverter-charger, you may have caused yourself much more expense, time and battery performance will tell