I have 6x 12v 130Ah Victron Energy AGM´s in 3 pairs, so make 390A @ 24 volts. Most of the charging power is coming from the solar panels, but on the occasional dull day, I want to be able to charge with a generator. I quite like the Phoenix Smart IP43 24/25 charger, as it is compact and smart. But, in the description for this charger, a battery bank of 125-250Ah is recommended. How much of a problem is it to get it to charge 390Ah? Is it is a matter of time? Or can´t it just manage it?