I have a 65 ltr dual zone iron man fridge and it has a three stage voltage protection with the lowest being 10.5 volts or the like can't remember/find. Question is can I bypass this in some way to get the most from my second (deep cycle) battery? My dads engal you can turn it off all together meaning you can keep running the fridge untill the battery is dead, but mine the fridge stops at set voltage thus leaving considerable charge still in the battery. Any help appreciated.