Got it! Thanks.Its like a split charger but more powerful so charges the leisure batteries more when you are driving.
My solar charges all batteries and its working good when its bright or sunny
But on days like this where its cloudy etc i get very little from the solar and if using the heating etc at night i struggle for power.
Fed up with it so next van im investing in proper kit so i never have to worry about power.
Im going to check what the split is on my charger,as between leisure and vehicle. I think it does leisure first then vehicle,but will check handbook when visiting storage site.