I’m about to set up a second battery in the tray of my 2013 BT 50, after spending hours online looking at different set ups I still have a burning question, why can’t I just charge the battery directly from the alternator? Why can’t the alternator do the same for the AUX battery as it does for the starter battery?
I’m told that my alternator isn’t a ‘smart’ alternator as fitted to the newer model. No doubt I’ll need to have an isolator somewhere but the huge cost of a bc/dc or dc/dc charger seems over the top.
I just want to run an 80litre fridge (I know its too big but it’s what I have) and some lighting. I have a 130amp battery.
Just hoping to get some lived experience from the good people of this site.