I run mine on all all the time.Never had a problem.I do have 2 large batteries and wouldn't recomend someone to run it on all unless they are truly confident they won't drain thier batteries.I know my batteries will not leave me straned.Most cases i would recomend run on 1 or 2 and save one for starting.After rereading your question,I run the boat on all at all times,never had a concern with my 496